Composites Science and Technology最新文献_第3页

A study on the thermo-mechanical dynamic response characteristics of unidirectional CF/PEEK composite laminates under high strain rates

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-29 DOI: 10.1016/j.compscitech.2025.111162

Zhenbo Wu , Tian Zhao , Ziheng Qiu , Boang Su , Jingze Yi , Ying Li

This study systematically investigates the high-velocity impact behavior of CF/PEEK composite laminates along both the longitudinal and thickness directions using a combined theoretical, numerical, and experimental approach. Within the framework of the second law of thermodynamics, the inevitability of temperature rise and the irreversibility of stiffness degradation during impact processes were rigorously established, laying a fundamental foundation for investigating the thermo-mechanical response of semi-crystalline thermoplastic composites. The mechanisms and underlying causes of heat generation during impact were derived and validated, offering valuable insights into energy dissipation, damage evolution, and the interaction between thermal and mechanical phenomena. The finite element analysis (FEA), based on the proposed progressive damage-based heat generation theory, accurately captured both the temperature rise and stress distribution within the unidirectional CF/PEEK composite laminate specimens, demonstrating a strong correlation with the experimental data. The analysis revealed that impacts along the longitudinal direction primarily induce interfacial failure, fiber breakage, and shear cracking, whereas impacts along the transverse and thickness directions lead to inter-fiber failure (IFF), with cracks propagating at a 55° angle. This behavior is attributed to the anisotropic nature of unidirectional composites, which influences the shear stress distribution and governs the crack propagation direction. In both impact scenarios, extensive plastic deformation and brittle fracture were observed, further confirming the conversion of mechanical energy into thermal energy. These findings provide valuable insights for the structural design and optimization of composite materials subjected to extreme mechanical and thermal loading conditions.

{"title":"A study on the thermo-mechanical dynamic response characteristics of unidirectional CF/PEEK composite laminates under high strain rates","authors":"Zhenbo Wu , Tian Zhao , Ziheng Qiu , Boang Su , Jingze Yi , Ying Li","doi":"10.1016/j.compscitech.2025.111162","DOIUrl":"10.1016/j.compscitech.2025.111162","url":null,"abstract":"<div><div>This study systematically investigates the high-velocity impact behavior of CF/PEEK composite laminates along both the longitudinal and thickness directions using a combined theoretical, numerical, and experimental approach. Within the framework of the second law of thermodynamics, the inevitability of temperature rise and the irreversibility of stiffness degradation during impact processes were rigorously established, laying a fundamental foundation for investigating the thermo-mechanical response of semi-crystalline thermoplastic composites. The mechanisms and underlying causes of heat generation during impact were derived and validated, offering valuable insights into energy dissipation, damage evolution, and the interaction between thermal and mechanical phenomena. The finite element analysis (FEA), based on the proposed progressive damage-based heat generation theory, accurately captured both the temperature rise and stress distribution within the unidirectional CF/PEEK composite laminate specimens, demonstrating a strong correlation with the experimental data. The analysis revealed that impacts along the longitudinal direction primarily induce interfacial failure, fiber breakage, and shear cracking, whereas impacts along the transverse and thickness directions lead to inter-fiber failure (IFF), with cracks propagating at a 55° angle. This behavior is attributed to the anisotropic nature of unidirectional composites, which influences the shear stress distribution and governs the crack propagation direction. In both impact scenarios, extensive plastic deformation and brittle fracture were observed, further confirming the conversion of mechanical energy into thermal energy. These findings provide valuable insights for the structural design and optimization of composite materials subjected to extreme mechanical and thermal loading conditions.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"266 ","pages":"Article 111162"},"PeriodicalIF":8.3,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Curcumin encapsulated zeolitic imidazolate frameworks modified polyetheretherketone promotes osteogenic capacity through immunomodulation

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-26 DOI: 10.1016/j.compscitech.2025.111164

Sihan Ma , Heyi Gong , Duo Sun , Xin Fang , Xiao Han , Yue Liu , Yadi Su , Junqi Wang , Yu Wang , Jinghui Zhao

Controlling the immune response and enhancing osteogenesis are essential for the long-term success of biomaterial implantation. Although polyetheretherketone (PEEK) is widely used in orthopedic implants, its inherent bioinertness and poor osteogenic capacity limit its use in clinical applications. In this study, curcumin (CCM) and zeolitic imidazolate frameworks-8 nanoparticles (ZIF-8 NPs) were introduced onto PEEK substrate to obtain the SPEEK-CCM@ZIF-8 (SPZC) system, which enhances osseointegration through early immunomodulation. SPEEK-CCM@ZIF-8 induces macrophage polarization towards M2 phenotype to reduce inflammation, promotes osteogenic differentiation capacity of bone marrow mesenchymal stem cells (BMSCs), and enhances the osseointegration and osteogenic capacity of PEEK implants. In vivo evaluation further confirmed the enhanced osteointegration effect of SPZC. Our results suggest that the CCM@ZIF-8 coating confers good osteogenic capacity to PEEK and that SPZC will have great potential as an implant.

{"title":"Curcumin encapsulated zeolitic imidazolate frameworks modified polyetheretherketone promotes osteogenic capacity through immunomodulation","authors":"Sihan Ma , Heyi Gong , Duo Sun , Xin Fang , Xiao Han , Yue Liu , Yadi Su , Junqi Wang , Yu Wang , Jinghui Zhao","doi":"10.1016/j.compscitech.2025.111164","DOIUrl":"10.1016/j.compscitech.2025.111164","url":null,"abstract":"<div><div>Controlling the immune response and enhancing osteogenesis are essential for the long-term success of biomaterial implantation. Although polyetheretherketone (PEEK) is widely used in orthopedic implants, its inherent bioinertness and poor osteogenic capacity limit its use in clinical applications. In this study, curcumin (CCM) and zeolitic imidazolate frameworks-8 nanoparticles (ZIF-8 NPs) were introduced onto PEEK substrate to obtain the SPEEK-CCM@ZIF-8 (SPZC) system, which enhances osseointegration through early immunomodulation. SPEEK-CCM@ZIF-8 induces macrophage polarization towards M2 phenotype to reduce inflammation, promotes osteogenic differentiation capacity of bone marrow mesenchymal stem cells (BMSCs), and enhances the osseointegration and osteogenic capacity of PEEK implants. In vivo evaluation further confirmed the enhanced osteointegration effect of SPZC. Our results suggest that the CCM@ZIF-8 coating confers good osteogenic capacity to PEEK and that SPZC will have great potential as an implant.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"266 ","pages":"Article 111164"},"PeriodicalIF":8.3,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143735175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of the effect of microstructural defects on the performance and fracture mechanism of adhesive single lap joints

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-25 DOI: 10.1016/j.compscitech.2025.111166

Kai Pang , Zewen Gu , Jianqiao Ye , Xiaonan Hou

Adhesive joints offer advantages over traditional joining methods due to their lightweight nature, reduced stress concentration, and ease of manufacturing. Their mechanical performance is influenced by various factors, including defects, which can significantly affect the performance of the joints. However, research focusing on fracture mechanisms of adhesive joints influenced by defects at microscale is still limited. This study conducts both experimental and numerical investigations into the effect of microstructural defects on the performance and fracture mechanism of multi-type adhesive single lap joints (SLJ). The adherend materials are aluminium alloy (Al) and polyphthalamide (PPA), bonded with an epoxy adhesive. Mechanical properties of the adhesive, adherends and SLJs, obtained through experimental studies, are employed to calibrate the microparameters in Discrete Element Method (DEM) models for numerical analysis. The developed DEM models can predict the performance and capture the microstructural fracture mechanisms of multi-type SLJs, through realistically incorporating different types of microstructural defects, including the interfacial and adhesive defects. Finally, the influencing mechanisms of microstructural defects on the performance and fracture mechanisms of multi-type SLJs with different interfacial adhesion are investigated, including joint strength, microscale crack initiation, coalescence, and propagation.

{"title":"Analysis of the effect of microstructural defects on the performance and fracture mechanism of adhesive single lap joints","authors":"Kai Pang , Zewen Gu , Jianqiao Ye , Xiaonan Hou","doi":"10.1016/j.compscitech.2025.111166","DOIUrl":"10.1016/j.compscitech.2025.111166","url":null,"abstract":"<div><div>Adhesive joints offer advantages over traditional joining methods due to their lightweight nature, reduced stress concentration, and ease of manufacturing. Their mechanical performance is influenced by various factors, including defects, which can significantly affect the performance of the joints. However, research focusing on fracture mechanisms of adhesive joints influenced by defects at microscale is still limited. This study conducts both experimental and numerical investigations into the effect of microstructural defects on the performance and fracture mechanism of multi-type adhesive single lap joints (SLJ). The adherend materials are aluminium alloy (Al) and polyphthalamide (PPA), bonded with an epoxy adhesive. Mechanical properties of the adhesive, adherends and SLJs, obtained through experimental studies, are employed to calibrate the microparameters in Discrete Element Method (DEM) models for numerical analysis. The developed DEM models can predict the performance and capture the microstructural fracture mechanisms of multi-type SLJs, through realistically incorporating different types of microstructural defects, including the interfacial and adhesive defects. Finally, the influencing mechanisms of microstructural defects on the performance and fracture mechanisms of multi-type SLJs with different interfacial adhesion are investigated, including joint strength, microscale crack initiation, coalescence, and propagation.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"266 ","pages":"Article 111166"},"PeriodicalIF":8.3,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Size effect and damage mechanism of Double–Double open-hole composite laminates

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-25 DOI: 10.1016/j.compscitech.2025.111158

Xiang Li , Xinglin Lv , Tianyu Jiang , Qinpei Zhao , Weixiong Rao , Yan Li , Jie Zhi , Bin Yang

Double–Double (DD) laminates are emerging as a promising lay-up design, which employs

[\pm Φ, \pm Ψ]

as a basic unit to replace the traditional method of using discrete

0^{o}

,

\pm 4 5^{o}

, and

9 0^{o}

layers (called QUAD laminates). This novel design offers several advantages, including simplified manufacturing processes, greater design flexibility, and significant potential for weight reduction. While DD laminates have gained increasing attention in recent years, their mechanical behavior in configurations with open holes, a common feature in practical applications, remains insufficiently studied. This paper aims to investigate the effect of open holes on the failure behavior and strength of DD laminates. To this end, we first present an experimental campaign on four groups of open-hole tensile specimens, including QUAD laminates with quasi-isotropic (QI) and soft (with more than 50%

\pm 4 5^{o}

layers) lay-ups, as well as their DD laminate counterparts designed to maintain equivalent in-plane stiffness. Subsequently, progressive damage analysis and strength predictions were performed based on smeared crack modeling and finite fracture mechanics, respectively. Results show that QUAD_QI, serving as a baseline, presents a conventional size effect: the notched strength decreases as the hole diameter increases when the diameter-to-width is kept constant. In contrast, DD laminates demonstrate an inverse size effect, where their strength ultimately exceeds that of the corresponding QUAD laminates when the hole diameter is the largest. This phenomenon is closely tied to the evolution of damage mechanism as the geometric size changes, in which different roles of sub-critical damage events in the final failure of QUAD and DD laminates were discovered.

{"title":"Size effect and damage mechanism of Double–Double open-hole composite laminates","authors":"Xiang Li , Xinglin Lv , Tianyu Jiang , Qinpei Zhao , Weixiong Rao , Yan Li , Jie Zhi , Bin Yang","doi":"10.1016/j.compscitech.2025.111158","DOIUrl":"10.1016/j.compscitech.2025.111158","url":null,"abstract":"<div><div>Double–Double (DD) laminates are emerging as a promising lay-up design, which employs <span><math><mrow><mo>[</mo><mo>±</mo><mi>Φ</mi><mo>,</mo><mo>±</mo><mi>Ψ</mi><mo>]</mo></mrow></math></span> as a basic unit to replace the traditional method of using discrete <span><math><msup><mrow><mn>0</mn></mrow><mrow><mi>o</mi></mrow></msup></math></span>, <span><math><mrow><mo>±</mo><mn>4</mn><msup><mrow><mn>5</mn></mrow><mrow><mi>o</mi></mrow></msup></mrow></math></span>, and <span><math><mrow><mn>9</mn><msup><mrow><mn>0</mn></mrow><mrow><mi>o</mi></mrow></msup></mrow></math></span> layers (called QUAD laminates). This novel design offers several advantages, including simplified manufacturing processes, greater design flexibility, and significant potential for weight reduction. While DD laminates have gained increasing attention in recent years, their mechanical behavior in configurations with open holes, a common feature in practical applications, remains insufficiently studied. This paper aims to investigate the effect of open holes on the failure behavior and strength of DD laminates. To this end, we first present an experimental campaign on four groups of open-hole tensile specimens, including QUAD laminates with quasi-isotropic (QI) and soft (with more than 50% <span><math><mrow><mo>±</mo><mn>4</mn><msup><mrow><mn>5</mn></mrow><mrow><mi>o</mi></mrow></msup></mrow></math></span> layers) lay-ups, as well as their DD laminate counterparts designed to maintain equivalent in-plane stiffness. Subsequently, progressive damage analysis and strength predictions were performed based on smeared crack modeling and finite fracture mechanics, respectively. Results show that QUAD_QI, serving as a baseline, presents a conventional size effect: the notched strength decreases as the hole diameter increases when the diameter-to-width is kept constant. In contrast, DD laminates demonstrate an inverse size effect, where their strength ultimately exceeds that of the corresponding QUAD laminates when the hole diameter is the largest. This phenomenon is closely tied to the evolution of damage mechanism as the geometric size changes, in which different roles of sub-critical damage events in the final failure of QUAD and DD laminates were discovered.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"266 ","pages":"Article 111158"},"PeriodicalIF":8.3,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multiscale enhancements in Z-pin reinforcement performance through curing parameters

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-25 DOI: 10.1016/j.compscitech.2025.111157

Jisiyuan Cheng , Yingjie Xu , Weihong Zhang , Weiwei Liu

Z-pinning is employed by composite laminates to enhance interlaminar performances. Z-pinned composites are then cured to obtain a vastly enhanced interlaminar fracture toughness. However, rare research has focused on the curing effects on the mechanical performances of Z-pinned laminates. This paper presents a multiscale experimental and simulation investigation of the curing effects on the individual Z-pin bridging behaviors and the mode Ⅰ interlaminar fracture of multi-pinned laminates by changing holding temperatures and times of cure. The results reveal that a low holding temperature for a long time decreases the cure-induced Z-pin/composite interfacial cracks, thus generating larger Z-pin energy dissipation and a better specimen's load-carrying capacity. Compared with 403 K for 150 min, the Z-pin energy dissipation and interlaminar fracture toughness increased by 32.22 % and 38.82 % by holding at 383 K for 200 min. Mesoscale and macroscale models were developed to predict the cure-induced Z-pin interfacial conditions, Z-pin bridging behaviors, and reinforcement efficiency. Combining the experiments and numerical illustration, this paper presents the possibility of optimizing the Z-pinning performances through the curing profiles.

{"title":"Multiscale enhancements in Z-pin reinforcement performance through curing parameters","authors":"Jisiyuan Cheng , Yingjie Xu , Weihong Zhang , Weiwei Liu","doi":"10.1016/j.compscitech.2025.111157","DOIUrl":"10.1016/j.compscitech.2025.111157","url":null,"abstract":"<div><div>Z-pinning is employed by composite laminates to enhance interlaminar performances. Z-pinned composites are then cured to obtain a vastly enhanced interlaminar fracture toughness. However, rare research has focused on the curing effects on the mechanical performances of Z-pinned laminates. This paper presents a multiscale experimental and simulation investigation of the curing effects on the individual Z-pin bridging behaviors and the mode Ⅰ interlaminar fracture of multi-pinned laminates by changing holding temperatures and times of cure. The results reveal that a low holding temperature for a long time decreases the cure-induced Z-pin/composite interfacial cracks, thus generating larger Z-pin energy dissipation and a better specimen's load-carrying capacity. Compared with 403 K for 150 min, the Z-pin energy dissipation and interlaminar fracture toughness increased by 32.22 % and 38.82 % by holding at 383 K for 200 min. Mesoscale and macroscale models were developed to predict the cure-induced Z-pin interfacial conditions, Z-pin bridging behaviors, and reinforcement efficiency. Combining the experiments and numerical illustration, this paper presents the possibility of optimizing the Z-pinning performances through the curing profiles.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"266 ","pages":"Article 111157"},"PeriodicalIF":8.3,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultra-high interfacial strength of glass fiber/epoxy composites via semi-interpenetrating networks modified rigid-flexible structures

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-21 DOI: 10.1016/j.compscitech.2025.111161

Yuhao Wang , Dedong Zhang , Hanfu Shi , Chenchao Niu , Chenxi Huyan , Dong Liu , Fei Chen , Liqun Zhang

Interface is one of the key factors to determine mechanical properties of glass fiber reinforced polymers (GFRPs), and relates to the efficient transfer and dispersion of stress from polymer to glass fibers. Fabricating rigid-flexible structures on glass fibers is a strategy to establish robust interfaces in GFRPs. However, the rigid components that consist of nanoparticles usually suffers from agglomerating during the process of GFRPs production, leading to low interfacial strength. In this work, we designed novel rigid-flexible structures on glass fibers by sizing method, and focused on preventing rigid components of rigid-flexible structures from agglomerating. Semi-interpenetrating polymer networks (semi-IPNs) as flexible components of rigid-flexible structures could anchor cellulose nanofibers as rigid components by hydrogen bonding to prevent cellulose nanofibers from agglomerating, thus strengthen the penetration of glass fiber and matrix resin. The uniformly dispersed cellulose nanofibers could deflect cracks and improve modulus to balance modulus difference between glass fibers and matrix resin. As a result, interfacial shear strength (IFSS) and transverse fiber bundle tension (TFBT) strength of GFRPs improved from 36.43 MPa to 48.60 MPa, from 34.43 MPa to 49.39 MPa, respectively. This work provides a promising strategy to strengthen the interfacial strength of GFRPs.

{"title":"Ultra-high interfacial strength of glass fiber/epoxy composites via semi-interpenetrating networks modified rigid-flexible structures","authors":"Yuhao Wang , Dedong Zhang , Hanfu Shi , Chenchao Niu , Chenxi Huyan , Dong Liu , Fei Chen , Liqun Zhang","doi":"10.1016/j.compscitech.2025.111161","DOIUrl":"10.1016/j.compscitech.2025.111161","url":null,"abstract":"<div><div>Interface is one of the key factors to determine mechanical properties of glass fiber reinforced polymers (GFRPs), and relates to the efficient transfer and dispersion of stress from polymer to glass fibers. Fabricating rigid-flexible structures on glass fibers is a strategy to establish robust interfaces in GFRPs. However, the rigid components that consist of nanoparticles usually suffers from agglomerating during the process of GFRPs production, leading to low interfacial strength. In this work, we designed novel rigid-flexible structures on glass fibers by sizing method, and focused on preventing rigid components of rigid-flexible structures from agglomerating. Semi-interpenetrating polymer networks (semi-IPNs) as flexible components of rigid-flexible structures could anchor cellulose nanofibers as rigid components by hydrogen bonding to prevent cellulose nanofibers from agglomerating, thus strengthen the penetration of glass fiber and matrix resin. The uniformly dispersed cellulose nanofibers could deflect cracks and improve modulus to balance modulus difference between glass fibers and matrix resin. As a result, interfacial shear strength (IFSS) and transverse fiber bundle tension (TFBT) strength of GFRPs improved from 36.43 MPa to 48.60 MPa, from 34.43 MPa to 49.39 MPa, respectively. This work provides a promising strategy to strengthen the interfacial strength of GFRPs.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"265 ","pages":"Article 111161"},"PeriodicalIF":8.3,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel strategy for designing high-performance self-healing polysiloxane-polyurea composites enhanced by dopamine-grafted cellulose nanofibers and Zn2+

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-20 DOI: 10.1016/j.compscitech.2025.111159

Nan Sun , Xi Ma , Bitun Wang , Jie Zheng , Xihua Wang , Zhiguo Li , Zengtao Chen , Yang Liu

Inspired by natural mussels, a novel dopamine-grafted cellulose nanofiber (DA-CNF) functional filler and Zn²⁺ were incorporated into polysiloxane-polyurea to create advanced composites for Internet of Things applications. Through experimental characterization, molecular dynamics (MD) simulations and finite element (FE) analysis, we thoroughly investigated the mechanism by which DA-CNF and Zn²⁺ improve the mechanical and self-healing properties of the polymer. The innovative synergistic effect of extra-added dynamic hydrogen bonds and metal ion coordination bonds between the filler and matrix simultaneously enhanced mechanical strength and self-healing efficiency, overcoming the traditional trade-off problem in conventional polymers. The results showed that the tensile strength and healing efficiency of DA-CNF/PU@Zn²⁺ were 198.89 % and 104.77 % of the value of the control sample, respectively. This performance significantly surpasses that of previously reported self-healing polydimethylsiloxane-based materials. In the EMI shielding tests for Internet of Things applications, the conductive composite film fabricated with DA-CNF/PU@Zn²⁺ and silver nanowires (AgNWs) effectively addresses the issues of resource waste and device stability. These findings offer a new strategy for designing high-performance self-healing composite materials with significant potential for applications in electronics, aerospace, automotive and wearable devices.

{"title":"A novel strategy for designing high-performance self-healing polysiloxane-polyurea composites enhanced by dopamine-grafted cellulose nanofibers and Zn2+","authors":"Nan Sun , Xi Ma , Bitun Wang , Jie Zheng , Xihua Wang , Zhiguo Li , Zengtao Chen , Yang Liu","doi":"10.1016/j.compscitech.2025.111159","DOIUrl":"10.1016/j.compscitech.2025.111159","url":null,"abstract":"<div><div>Inspired by natural mussels, a novel dopamine-grafted cellulose nanofiber (DA-CNF) functional filler and Zn<sup>2+</sup> were incorporated into polysiloxane-polyurea to create advanced composites for Internet of Things applications. Through experimental characterization, molecular dynamics (MD) simulations and finite element (FE) analysis, we thoroughly investigated the mechanism by which DA-CNF and Zn<sup>2+</sup> improve the mechanical and self-healing properties of the polymer. The innovative synergistic effect of extra-added dynamic hydrogen bonds and metal ion coordination bonds between the filler and matrix simultaneously enhanced mechanical strength and self-healing efficiency, overcoming the traditional trade-off problem in conventional polymers. The results showed that the tensile strength and healing efficiency of DA-CNF/PU@Zn<sup>2+</sup> were 198.89 % and 104.77 % of the value of the control sample, respectively. This performance significantly surpasses that of previously reported self-healing polydimethylsiloxane-based materials. In the EMI shielding tests for Internet of Things applications, the conductive composite film fabricated with DA-CNF/PU@Zn<sup>2+</sup> and silver nanowires (AgNWs) effectively addresses the issues of resource waste and device stability. These findings offer a new strategy for designing high-performance self-healing composite materials with significant potential for applications in electronics, aerospace, automotive and wearable devices.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"266 ","pages":"Article 111159"},"PeriodicalIF":8.3,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143714783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-scale semantic segmentation for fiber identification and 3D reconstruction of unidirectional composite

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-20 DOI: 10.1016/j.compscitech.2025.111160

Peng Zhang , Xun Zhou , Ruoxi Liang , Jiangfeng Li , Keke Tang , Yan Li

The accurate identification and reconstruction of fiber architectures from X-ray computed tomography (CT) images is crucial for understanding the microstructural characteristics of fiber-reinforced composites. However, achieving reliable segmentation remains challenging due to imaging artifacts, apparent fiber contacts, and complex fiber distributions. This study presents a multi-scale feature enhanced semantic segmentation framework for fiber identification and three-dimensional reconstruction in unidirectional composites. A hybrid labeling strategy is developed to establish high-quality training datasets by combining watershed-based initial segmentation with strategic manual refinement, significantly reducing the manual annotation workload while maintaining label accuracy. This framework features a multi-scale semantic segmentation network incorporating an attention-based fusion mechanism, enabling the simultaneous capture of local fiber details and global structural patterns while effectively handling abnormal fiber adhesion in fiber imaging. To ensure structural continuity in three-dimensional visualization, an enhanced voxel-based reconstruction method is proposed, featuring adaptive z-axis interpolation and systematic refinement processes. Evaluated on a publicly available micro-CT dataset of unidirectional composites, the framework achieves superior performance with a mean Intersection over Union of 93.6 % and Dice coefficient of 96.7 %, outperforming existing methods such as U-Net and DeepLabV3+ in both segmentation accuracy and efficiency. The methodology demonstrates robust capability in handling varying fiber densities and complex spatial arrangements, providing a reliable foundation for subsequent microstructural analysis and finite element modeling of composite materials.

{"title":"Multi-scale semantic segmentation for fiber identification and 3D reconstruction of unidirectional composite","authors":"Peng Zhang , Xun Zhou , Ruoxi Liang , Jiangfeng Li , Keke Tang , Yan Li","doi":"10.1016/j.compscitech.2025.111160","DOIUrl":"10.1016/j.compscitech.2025.111160","url":null,"abstract":"<div><div>The accurate identification and reconstruction of fiber architectures from X-ray computed tomography (CT) images is crucial for understanding the microstructural characteristics of fiber-reinforced composites. However, achieving reliable segmentation remains challenging due to imaging artifacts, apparent fiber contacts, and complex fiber distributions. This study presents a multi-scale feature enhanced semantic segmentation framework for fiber identification and three-dimensional reconstruction in unidirectional composites. A hybrid labeling strategy is developed to establish high-quality training datasets by combining watershed-based initial segmentation with strategic manual refinement, significantly reducing the manual annotation workload while maintaining label accuracy. This framework features a multi-scale semantic segmentation network incorporating an attention-based fusion mechanism, enabling the simultaneous capture of local fiber details and global structural patterns while effectively handling abnormal fiber adhesion in fiber imaging. To ensure structural continuity in three-dimensional visualization, an enhanced voxel-based reconstruction method is proposed, featuring adaptive <em>z</em>-axis interpolation and systematic refinement processes. Evaluated on a publicly available micro-CT dataset of unidirectional composites, the framework achieves superior performance with a mean Intersection over Union of 93.6 % and Dice coefficient of 96.7 %, outperforming existing methods such as U-Net and DeepLabV3+ in both segmentation accuracy and efficiency. The methodology demonstrates robust capability in handling varying fiber densities and complex spatial arrangements, providing a reliable foundation for subsequent microstructural analysis and finite element modeling of composite materials.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"265 ","pages":"Article 111160"},"PeriodicalIF":8.3,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Molecular simulation of interaction mechanism between wollastonite and stearic acid and use of modified wollastonite powder as filler in polyamide 6 and polypropylene

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-18 DOI: 10.1016/j.compscitech.2025.111152

Chang Shu, Caili Wang

The physical and chemical properties of wollastonite were optimized by dry modification using stearic acid, and the influence of the stearic acid dosage on the modification effect was explored. The surface functional groups of the modified and unmodified wollastonite powder were characterized using infrared spectroscopy, and a molecular simulation was employed to evaluate the micromechanism of the stearic acid-modified wollastonite. The surface of the wollastonite is most active when a single hydroxyl group is bound to its surface and the hydroxyl group does not attract the atoms of wollastonite itself. A C–O–Ca bond is formed between the stearic acid and wollastonite, and in terms of the activation index, the optimal stearic acid dosage is 1.5 %. Composite materials were prepared by filling polyamide 6 (PA6) and polypropylene (PP) with the unmodified and modified wollastonite powders, and the impact strength, tensile strength, bending strength, and other indicators of the composite materials were tested. The PA6 and PP samples filled with unmodified wollastonite showed improved rigidity but lower toughness compared to the pure PA6 and PP samples. In contrast, using the modified wollastonite as a filler simultaneously improved both the rigidity and toughness of the PA6 and PP samples.

{"title":"Molecular simulation of interaction mechanism between wollastonite and stearic acid and use of modified wollastonite powder as filler in polyamide 6 and polypropylene","authors":"Chang Shu, Caili Wang","doi":"10.1016/j.compscitech.2025.111152","DOIUrl":"10.1016/j.compscitech.2025.111152","url":null,"abstract":"<div><div>The physical and chemical properties of wollastonite were optimized by dry modification using stearic acid, and the influence of the stearic acid dosage on the modification effect was explored. The surface functional groups of the modified and unmodified wollastonite powder were characterized using infrared spectroscopy, and a molecular simulation was employed to evaluate the micromechanism of the stearic acid-modified wollastonite. The surface of the wollastonite is most active when a single hydroxyl group is bound to its surface and the hydroxyl group does not attract the atoms of wollastonite itself. A C–<em>O</em>–Ca bond is formed between the stearic acid and wollastonite, and in terms of the activation index, the optimal stearic acid dosage is 1.5 %. Composite materials were prepared by filling polyamide 6 (PA6) and polypropylene (PP) with the unmodified and modified wollastonite powders, and the impact strength, tensile strength, bending strength, and other indicators of the composite materials were tested. The PA6 and PP samples filled with unmodified wollastonite showed improved rigidity but lower toughness compared to the pure PA6 and PP samples. In contrast, using the modified wollastonite as a filler simultaneously improved both the rigidity and toughness of the PA6 and PP samples.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"265 ","pages":"Article 111152"},"PeriodicalIF":8.3,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bio-inspired inorganic-organic structure synergistic interfacial modification for enhancing mechanical and electromagnetic interference shielding properties of carbon fiber/epoxy composites

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology

Pub Date : 2025-03-17 DOI: 10.1016/j.compscitech.2025.111156

Rong Liu , Jie Chen , Wei Zhao , Lihao Sun , Ye Li , Yonglin Yang , Zhigang Liu

Carbon fiber reinforced polymer composites (CFRPs) are in huge demand in aerospace and navigation to reduce fuel consumption, but the weak mechanical and electromagnetic (EM) shielding properties remain pressing issues. Inspired by the bio-adhesion of mussels in nature, we self-polymerized organic polydopamine (PDA) layer on the carbon fiber (CF) surface as a versatile platform and successfully introduced inorganic Co₃O₄ nanosheets into the PDA-coated CF (PCF) surface via self-assembly process to enhance the interfacial bonding and electrical conductivity between the fiber and epoxy. The results showed that Co₃O₄-PDA-CF/EP outperformed unmodified CF/EP in flexural strength, interlaminar shear strength (ILSS), interfacial shear strength (IFSS), and electromagnetic interference (EMI) shielding properties, with enhancements of 59.4 %, 76.1 %, 131.5 %, and 61.1 %, respectively. Notably, the main fracture mechanism of composites gradually transfers from interfacial failure to cohesive failure. Briefly, the work provides experimental validation for developing high-performance multifunctional CFRPs and show potential application prospects in aircraft and other fields.

{"title":"Bio-inspired inorganic-organic structure synergistic interfacial modification for enhancing mechanical and electromagnetic interference shielding properties of carbon fiber/epoxy composites","authors":"Rong Liu , Jie Chen , Wei Zhao , Lihao Sun , Ye Li , Yonglin Yang , Zhigang Liu","doi":"10.1016/j.compscitech.2025.111156","DOIUrl":"10.1016/j.compscitech.2025.111156","url":null,"abstract":"<div><div>Carbon fiber reinforced polymer composites (CFRPs) are in huge demand in aerospace and navigation to reduce fuel consumption, but the weak mechanical and electromagnetic (EM) shielding properties remain pressing issues. Inspired by the bio-adhesion of mussels in nature, we self-polymerized organic polydopamine (PDA) layer on the carbon fiber (CF) surface as a versatile platform and successfully introduced inorganic Co<sub>3</sub>O<sub>4</sub> nanosheets into the PDA-coated CF (PCF) surface via self-assembly process to enhance the interfacial bonding and electrical conductivity between the fiber and epoxy. The results showed that Co<sub>3</sub>O<sub>4</sub>-PDA-CF/EP outperformed unmodified CF/EP in flexural strength, interlaminar shear strength (ILSS), interfacial shear strength (IFSS), and electromagnetic interference (EMI) shielding properties, with enhancements of 59.4 %, 76.1 %, 131.5 %, and 61.1 %, respectively. Notably, the main fracture mechanism of composites gradually transfers from interfacial failure to cohesive failure. Briefly, the work provides experimental validation for developing high-performance multifunctional CFRPs and show potential application prospects in aircraft and other fields.</div></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"265 ","pages":"Article 111156"},"PeriodicalIF":8.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0