Composite Structures最新文献

英文中文

Integrated design of intelligent structures for composite laminates with embedded MFCs: Theoretical modeling and experimental study

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2025-02-06 DOI: 10.1016/j.compstruct.2025.118913

Yu Zhang , Wei Sun , Hui Zhang , Hongwei Ma , Dongxu Du , Kunpeng Xu , Hui Li

This work presents a design of intelligent structures for integrated composite laminate (ICL) with embedded MFCs. Considering the piezoelectric effect of MFCs, a semi-analytical dynamic model is established by combining the first-order shear deformation theory and the Lagrange equation. Furthermore, the preparation method of the ICL specimen with embedded MFCs is summarized, and an experimental system capable of active control testing is constructed. The maximum errors between the natural frequencies obtained by the semi-analytical method and those from finite element results and experimental results are 0.58% and 4.18%, respectively, and the vibration response results are in good agreement. Under the given control parameters, the vibration response after control is reduced by about 44.4%. The accuracy of the proposed modeling method and the effectiveness of the active control system are verified. Finally, the effects of fiber distribution and angle on the natural characteristics and damping performance of the structure are investigated, the influence law of skin thickness change on the active control effect is revealed, and the control performance of the active control system under complex excitation conditions is verified. The findings provide a new technical approach for vibration suppression of composite laminate structures.

{"title":"Integrated design of intelligent structures for composite laminates with embedded MFCs: Theoretical modeling and experimental study","authors":"Yu Zhang , Wei Sun , Hui Zhang , Hongwei Ma , Dongxu Du , Kunpeng Xu , Hui Li","doi":"10.1016/j.compstruct.2025.118913","DOIUrl":"10.1016/j.compstruct.2025.118913","url":null,"abstract":"<div><div>This work presents a design of intelligent structures for integrated composite laminate (ICL) with embedded MFCs. Considering the piezoelectric effect of MFCs, a semi-analytical dynamic model is established by combining the first-order shear deformation theory and the Lagrange equation. Furthermore, the preparation method of the ICL specimen with embedded MFCs is summarized, and an experimental system capable of active control testing is constructed. The maximum errors between the natural frequencies obtained by the semi-analytical method and those from finite element results and experimental results are 0.58% and 4.18%, respectively, and the vibration response results are in good agreement. Under the given control parameters, the vibration response after control is reduced by about 44.4%. The accuracy of the proposed modeling method and the effectiveness of the active control system are verified. Finally, the effects of fiber distribution and angle on the natural characteristics and damping performance of the structure are investigated, the influence law of skin thickness change on the active control effect is revealed, and the control performance of the active control system under complex excitation conditions is verified. The findings provide a new technical approach for vibration suppression of composite laminate structures.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"357 ","pages":"Article 118913"},"PeriodicalIF":6.3,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143379426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Localization effects in micropolar laminated composites with imperfect contact conditions

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2025-02-06 DOI: 10.1016/j.compstruct.2025.118898

Raffaella Rizzoni , Michele Serpilli , Reinaldo Rodríguez-Ramos , Yoanh Espinosa-Almeyda , Frédéric Lebon , Maria Letizia Raffa , Serge Dumont

Within the framework of three-dimensional linear micropolar media, the Asymptotic Homogenization Method (AHM) has been recently applied to obtain the effective engineering moduli for a laminated composite with imperfect contact between the layers. The imperfect contact is prescribed by using a micropolar spring-type interface model, and the interface parameters enter the engineering constants related to the stiffness and torque. In this work, we obtain the concentration tensors linking the macroscopic averaged quantities (stress/couple-stress and strain/curvature) with their microscopic counterparts. A numerical example is proposed to illustrate the influence of the phases volume fraction and of the interface parameters on the strain/curvature and stress/couple-stress concentrations.

引用次数: 0

Uncertainty quantification of residual strength post lightning strike: A coupled stochastic thermal–electrical–mechanical simulation framework for composite laminates

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2025-02-06 DOI: 10.1016/j.compstruct.2025.118899

R.S. Chahar , T. Mukhopadhyay

The strength of composite laminates can be significantly impacted by the damage caused due to lightning strikes. Quantifying such impact of lightning strikes, taking the inevitable compound influence of material and lightning current uncertainty into consideration, is of utmost importance to ensure the operational safety and serviceability in critical composite structural applications such as aircraft and wind turbines. We introduce a machine learning-enabled stochastic framework of hybrid thermal–electrical–mechanical simulations for the uncertainty quantification of residual strength post lightning strike in composite laminates. A comprehensive probabilistic analysis is presented for accurately assessing the uncertainty associated with the residual tensile strength of carbon/epoxy laminates considering stochastic temperature-dependent material properties and lightning current waveform. The results reveal that source uncertainty of the unprotected laminates significantly influences the structural strength with considerable stochastic variability. The machine learning models are exploited further for conducting global sensitivity analysis to examine the relative impact of the influencing parameters on the residual strength after lightning strikes. Seamless coupling of the Gaussian process-driven machine learning model in the finite element based multi-physical lightning strike analysis, integrating multi-stage computationally intensive simulations, leads to an efficient quantification of uncertainty for complete probabilistic characterization of the residual strength and subsequent serviceability analysis.

{"title":"Uncertainty quantification of residual strength post lightning strike: A coupled stochastic thermal–electrical–mechanical simulation framework for composite laminates","authors":"R.S. Chahar , T. Mukhopadhyay","doi":"10.1016/j.compstruct.2025.118899","DOIUrl":"10.1016/j.compstruct.2025.118899","url":null,"abstract":"<div><div>The strength of composite laminates can be significantly impacted by the damage caused due to lightning strikes. Quantifying such impact of lightning strikes, taking the inevitable compound influence of material and lightning current uncertainty into consideration, is of utmost importance to ensure the operational safety and serviceability in critical composite structural applications such as aircraft and wind turbines. We introduce a machine learning-enabled stochastic framework of hybrid thermal–electrical–mechanical simulations for the uncertainty quantification of residual strength post lightning strike in composite laminates. A comprehensive probabilistic analysis is presented for accurately assessing the uncertainty associated with the residual tensile strength of carbon/epoxy laminates considering stochastic temperature-dependent material properties and lightning current waveform. The results reveal that source uncertainty of the unprotected laminates significantly influences the structural strength with considerable stochastic variability. The machine learning models are exploited further for conducting global sensitivity analysis to examine the relative impact of the influencing parameters on the residual strength after lightning strikes. Seamless coupling of the Gaussian process-driven machine learning model in the finite element based multi-physical lightning strike analysis, integrating multi-stage computationally intensive simulations, leads to an efficient quantification of uncertainty for complete probabilistic characterization of the residual strength and subsequent serviceability analysis.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"357 ","pages":"Article 118899"},"PeriodicalIF":6.3,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Multiscale experimental characterization of nonlinear mechanics and auxeticity in mechanical metamaterials with rotating squares

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2025-02-05 DOI: 10.1016/j.compstruct.2025.118931

Kazi Zahir Uddin , Matthew Heras , George Youssef , Thomas Kiel , Behrad Koohbor

Auxetic (negative Poisson’s ratio) structures made from rotating squares have attracted considerable attention due to their tunable shape control, strength, and strain energy absorption capacity. The present study aims to explore the interrelations between mesoscale kinematics and the macroscopic mechanical behavior of additively manufactured rotating-square auxetics under compressive loads. Specifically, correlations between the rotational degree of freedom of the squares, mechanical deformation of the cell hinges, and the macroscopic nonlinear mechanical and Poisson’s behaviors are investigated using experimental measurements supplemented by mathematical models. Structures with variable cell hinge thicknesses are fabricated by stereolithography additive manufacturing technique and then subjected to compressive loads applied at quasi-static and dynamic conditions with several orders of magnitude difference in strain rate. Multiscale mechanical deformation of the structure in each case is analyzed using digital image correlation (DIC). Experimental characterizations indicate strongly nonlinear and rate-sensitive auxetic behaviors in the examined structures. The role of cell hinge thickness is discussed in terms of the mechanical constraint that these components impose on the rotational degree of freedom of the solid squares in the structure, concurrently causing a nonlinear strain hardening behavior.

{"title":"Multiscale experimental characterization of nonlinear mechanics and auxeticity in mechanical metamaterials with rotating squares","authors":"Kazi Zahir Uddin , Matthew Heras , George Youssef , Thomas Kiel , Behrad Koohbor","doi":"10.1016/j.compstruct.2025.118931","DOIUrl":"10.1016/j.compstruct.2025.118931","url":null,"abstract":"<div><div>Auxetic (negative Poisson’s ratio) structures made from rotating squares have attracted considerable attention due to their tunable shape control, strength, and strain energy absorption capacity. The present study aims to explore the interrelations between mesoscale kinematics and the macroscopic mechanical behavior of additively manufactured rotating-square auxetics under compressive loads. Specifically, correlations between the rotational degree of freedom of the squares, mechanical deformation of the cell hinges, and the macroscopic nonlinear mechanical and Poisson’s behaviors are investigated using experimental measurements supplemented by mathematical models. Structures with variable cell hinge thicknesses are fabricated by stereolithography additive manufacturing technique and then subjected to compressive loads applied at quasi-static and dynamic conditions with several orders of magnitude difference in strain rate. Multiscale mechanical deformation of the structure in each case is analyzed using digital image correlation (DIC). Experimental characterizations indicate strongly nonlinear and rate-sensitive auxetic behaviors in the examined structures. The role of cell hinge thickness is discussed in terms of the mechanical constraint that these components impose on the rotational degree of freedom of the solid squares in the structure, concurrently causing a nonlinear strain hardening behavior.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"357 ","pages":"Article 118931"},"PeriodicalIF":6.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143265636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Self-sensing piezoelectric composites via generation and reception of ultrasonic guided waves

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2025-02-05 DOI: 10.1016/j.compstruct.2025.118927

Shulong Zhou , Yanfeng Shen , Chunquan Wang , Bao Wang , Yuan Tian

This paper presents a novel family of intelligent piezoelectric composite structures for establishing structural self-awareness via integrating the function of load bearing with the capability of generating and receiving high frequency, single-mode mechanical waves. Unlike conventional self-sensing composites limited to passive monitoring and low actuation capacity, this study introduces a novel structure-actuator-sensor integration that demonstrates active sensing and wave mode control capabilities, while preserving its mechanical performances. The structure is formed by distributing Pb(Zr_0.52Ti_0.48)O₃ piezo powder and epoxy as the active component to impregnate glass fibers, enabling every inch of the material to function as both an actuator and a sensor. Firstly, piezoelectric composite plate specimens are crafted to achieve high degree of sensitivity and reliability through material parameter optimization and process refinement. A series of mechanical performance comparative experiments are conducted to verify the load-bearing competency of the composites. The active actuation and self-sensing functionality of the composites are investigated via numerical simulations and experimental demonstrations. Single-mode guided wave propagation is successfully achieved. It enables the reduction of signal processing complexity caused by multi-modal and dispersive nature of guided waves, a common challenge in structural health monitoring systems. The simulations and experiments showcase that the proposed composites successfully achieve the active damage detection via single mode guided wave generation and reception. The composite system possesses the prowess for achieving active self-awareness through such a new fashion actuator-sensor-structure integration, which could be potentially utilized in the next generation of wing and fuselage structures in aviation industry, high pressure vessels for hydrogen storage, and smart composite pipelines for transporting gas and petroleum. The paper finishes with summary, concluding remarks, and suggestions for future work.

{"title":"Self-sensing piezoelectric composites via generation and reception of ultrasonic guided waves","authors":"Shulong Zhou , Yanfeng Shen , Chunquan Wang , Bao Wang , Yuan Tian","doi":"10.1016/j.compstruct.2025.118927","DOIUrl":"10.1016/j.compstruct.2025.118927","url":null,"abstract":"<div><div>This paper presents a novel family of intelligent piezoelectric composite structures for establishing structural self-awareness via integrating the function of load bearing with the capability of generating and receiving high frequency, single-mode mechanical waves. Unlike conventional self-sensing composites limited to passive monitoring and low actuation capacity, this study introduces a novel structure-actuator-sensor integration that demonstrates active sensing and wave mode control capabilities, while preserving its mechanical performances. The structure is formed by distributing Pb(Zr<sub>0.52</sub>Ti<sub>0.48</sub>)O<sub>3</sub> piezo powder and epoxy as the active component to impregnate glass fibers, enabling every inch of the material to function as both an actuator and a sensor. Firstly, piezoelectric composite plate specimens are crafted to achieve high degree of sensitivity and reliability through material parameter optimization and process refinement. A series of mechanical performance comparative experiments are conducted to verify the load-bearing competency of the composites. The active actuation and self-sensing functionality of the composites are investigated via numerical simulations and experimental demonstrations. Single-mode guided wave propagation is successfully achieved. It enables the reduction of signal processing complexity caused by multi-modal and dispersive nature of guided waves, a common challenge in structural health monitoring systems. The simulations and experiments showcase that the proposed composites successfully achieve the active damage detection via single mode guided wave generation and reception. The composite system possesses the prowess for achieving active self-awareness through such a new fashion actuator-sensor-structure integration, which could be potentially utilized in the next generation of wing and fuselage structures in aviation industry, high pressure vessels for hydrogen storage, and smart composite pipelines for transporting gas and petroleum. The paper finishes with summary, concluding remarks, and suggestions for future work.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"357 ","pages":"Article 118927"},"PeriodicalIF":6.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143379427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Experimental testing and micromechanical modelling of unidirectional CFRP composite laminae under multiaxial loading conditions

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2025-02-05 DOI: 10.1016/j.compstruct.2025.118889

Lei Wan , Ka Zhang , Jiayun Chen , Aonan Li , Jiang Wu , Dongmin Yang

This paper presents comprehensive experimental testing and numerical modelling of the failure behaviours of unidirectional carbon fibre reinforced polymer (UD-CFRP) composite laminae under multiaxial loading conditions. A novel modified Arcan test rig with a rotational clamp was developed to enable multiple stress combinations with out-of-plane stresses in UD laminae on a traditional laboratory-based uniaxial test machine. The test rig was verified by uniaxial tension and validated by off-axis tension. UD CFRP laminae were tested for the first time under five stress combinations using the test rig, with results cross-validated against a high-fidelity representative volume element (RVE)-based 3D micromechanical finite element model. Failure strength envelope and damage mechanisms demonstrate the applicability of the test rig for composite failure under multiaxial loading conditions with a broad spectrum of stress combinations.

引用次数: 0

Influence of different temperature on tensile failure mechanism of carbon/glass 2.5D woven hybrid composites: Experiment and numerical calculation

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2025-02-05 DOI: 10.1016/j.compstruct.2025.118932

Jiajing Zhang, Cunjing Li, Jianhua Zheng, Jin Sun, Diantang Zhang

The combination of 2.5D woven structure and hybridization is one of the effective ways to achieve the integration of high-load functions in fiber-reinforced resin matrix composites. However, the sensitivity of resin matrix composites to temperature makes the damage and failure process at high temperatures quite complex. This paper presents the influence of temperature on the tensile failure mechanism of carbon/glass 2.5D woven hybrid composites using both experimental and numerical methods. The tensile properties and failure morphology of 2.5D woven hybrid composites were studied at three different temperatures: 25 ℃, 150 ℃, 300 ℃. The internal morphology of the composites was obtained through X-ray computed tomography (Micro-CT) for subsequent meso-scale model reconstruction of 2.5D woven hybrid composites. The results showed the tensile strength and modulus at 300 ℃ were only 64.83 % and 35.35 % of those at 25 ℃. Additionally, the maximum errors in the predicted stiffness and strength were 8.05 % and 8.16 %, respectively, indicating that the established finite element model was relatively accurate. Furthermore, the tensile failure mechanisms differed at various temperatures. At 25 ℃, the damage forms were primarily warp fracture and resin debonding cracking. In contrast, at 300 ℃, the patterns of damage were largely interface debonding and delamination damage.

{"title":"Influence of different temperature on tensile failure mechanism of carbon/glass 2.5D woven hybrid composites: Experiment and numerical calculation","authors":"Jiajing Zhang, Cunjing Li, Jianhua Zheng, Jin Sun, Diantang Zhang","doi":"10.1016/j.compstruct.2025.118932","DOIUrl":"10.1016/j.compstruct.2025.118932","url":null,"abstract":"<div><div>The combination of 2.5D woven structure and hybridization is one of the effective ways to achieve the integration of high-load functions in fiber-reinforced resin matrix composites. However, the sensitivity of resin matrix composites to temperature makes the damage and failure process at high temperatures quite complex. This paper presents the influence of temperature on the tensile failure mechanism of carbon/glass 2.5D woven hybrid composites using both experimental and numerical methods. The tensile properties and failure morphology of 2.5D woven hybrid composites were studied at three different temperatures: 25 ℃, 150 ℃, 300 ℃. The internal morphology of the composites was obtained through X-ray computed tomography (Micro-CT) for subsequent <em>meso</em>-scale model reconstruction of 2.5D woven hybrid composites. The results showed the tensile strength and modulus at 300 ℃ were only 64.83 % and 35.35 % of those at 25 ℃. Additionally, the maximum errors in the predicted stiffness and strength were 8.05 % and 8.16 %, respectively, indicating that the established finite element model was relatively accurate. Furthermore, the tensile failure mechanisms differed at various temperatures. At 25 ℃, the damage forms were primarily warp fracture and resin debonding cracking. In contrast, at 300 ℃, the patterns of damage were largely interface debonding and delamination damage.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"357 ","pages":"Article 118932"},"PeriodicalIF":6.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143348735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Theoretical and numerical study on buckle propagation in sandwich pipelines subjected to external pressure

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2025-02-05 DOI: 10.1016/j.compstruct.2025.118930

Jixin Lin, Mingli Chen, Chi Liu, Jianghong Xue, Zhihua Ning

This paper presents a theoretical and numerical approach to investigate the buckle propagation phenomenon in sandwich pipeline under the external pressure based on the classical theory of shells. Assuming steady state buckle propagation, the components of the strain in the transition zone is derived from the available solutions of the displacement of the transition zone obtained in previous works by employing von Kármán’s nonlinear geometric relationship. The expression of the yield surface as well as the distributions of the plastic and elastic domains in the sandwich pipeline is educed by considering that the materials of the sandwich pipeline are incompressible and exhibit linear elastic linear hardening behavior. From the principle of conservation of energy, an explicit solution of the buckle propagation pressure for the sandwich pipeline under external pressure is established. The efficiency and accuracy of the proposed analysis are justified by comparing the analytical solution of the buckle propagation pressure with the experimental results from the existing literatures and the numerical predictions from ABAQUS finite element analysis. It is found that the buckle propagation pressure increases with the increasing of the yield strength or the strain hardening modulus of the outer and inner face-sheet layers but is insensitive to the change of the Young’s modulus. The core layer is used to provide thermal insulation and to improve the bending stiffness of sandwich pipelines and can bear the external load only when its yield strength reaches 40% of the yield strength of the facesheet layer. Furthermore, the buckle propagation pressure of the sandwich pipeline decreases with the reducing of the total thickness-to-radius ratio. In particular, when the thickness-to-radius ratio is less than 10^-3, the buckle will not propagate along the sandwich pipeline regardless of the magnitude of the external pressure.

{"title":"Theoretical and numerical study on buckle propagation in sandwich pipelines subjected to external pressure","authors":"Jixin Lin, Mingli Chen, Chi Liu, Jianghong Xue, Zhihua Ning","doi":"10.1016/j.compstruct.2025.118930","DOIUrl":"10.1016/j.compstruct.2025.118930","url":null,"abstract":"<div><div>This paper presents a theoretical and numerical approach to investigate the buckle propagation phenomenon in sandwich pipeline under the external pressure based on the classical theory of shells. Assuming steady state buckle propagation, the components of the strain in the transition zone is derived from the available solutions of the displacement of the transition zone obtained in previous works by employing von Kármán’s nonlinear geometric relationship. The expression of the yield surface as well as the distributions of the plastic and elastic domains in the sandwich pipeline is educed by considering that the materials of the sandwich pipeline are incompressible and exhibit linear elastic linear hardening behavior. From the principle of conservation of energy, an explicit solution of the buckle propagation pressure for the sandwich pipeline under external pressure is established. The efficiency and accuracy of the proposed analysis are justified by comparing the analytical solution of the buckle propagation pressure with the experimental results from the existing literatures and the numerical predictions from ABAQUS finite element analysis. It is found that the buckle propagation pressure increases with the increasing of the yield strength or the strain hardening modulus of the outer and inner face-sheet layers but is insensitive to the change of the Young’s modulus. The core layer is used to provide thermal insulation and to improve the bending stiffness of sandwich pipelines and can bear the external load only when its yield strength reaches 40% of the yield strength of the facesheet layer. Furthermore, the buckle propagation pressure of the sandwich pipeline decreases with the reducing of the total thickness-to-radius ratio. In particular, when the thickness-to-radius ratio is less than 10<sup>-3</sup>, the buckle will not propagate along the sandwich pipeline regardless of the magnitude of the external pressure.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"357 ","pages":"Article 118930"},"PeriodicalIF":6.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143376780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Rapid thermo-mechanical performance prediction and multi-objective optimization of tri-directional functionally graded material considering complex geometry and arbitrary graded paths

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2025-02-04 DOI: 10.1016/j.compstruct.2025.118929

Guangshuai Gu , Pin Wen , Fei Chen

This paper proposes an innovative framework for rapid performance prediction and multi-objective optimization of tri-directional functionally graded material, considering complex geometry and arbitrary graded paths in thermal environments. The framework employs non-uniform rational B-splines to describe the material distribution and geometric configuration of tri-directional functionally graded material. Based on three-dimensional elasticity theory and isogeometric analysis, the free vibration and bending behaviors of variable shape tri-directional functionally graded material in thermal environments are analyzed. To replace the time-consuming numerical calculation process, a three-dimensional convolutional neural network is introduced for the first time to construct a rapid performance prediction platform with ultra-high accuracy. Additionally, the multi-objective optimization of the material distribution and shape of tri-directional functionally graded material is realized by combining the non-dominated sorting genetic algorithm III. The framework’s effectiveness is verified by several numerical cases, including square plates, cutout plates and cylindrical shells, and the effects of different boundary conditions, temperature fields, and loading conditions on the results are discussed in depth. The results show that, compared with traditional one-directional functionally graded material, the tri-directional functionally graded material with numerous design variables optimized by the proposed framework exhibits significantly improved performance, highlighting the efficiency and versatility of this framework.

{"title":"Rapid thermo-mechanical performance prediction and multi-objective optimization of tri-directional functionally graded material considering complex geometry and arbitrary graded paths","authors":"Guangshuai Gu , Pin Wen , Fei Chen","doi":"10.1016/j.compstruct.2025.118929","DOIUrl":"10.1016/j.compstruct.2025.118929","url":null,"abstract":"<div><div>This paper proposes an innovative framework for rapid performance prediction and multi-objective optimization of tri-directional functionally graded material, considering complex geometry and arbitrary graded paths in thermal environments. The framework employs non-uniform rational B-splines to describe the material distribution and geometric configuration of tri-directional functionally graded material. Based on three-dimensional elasticity theory and isogeometric analysis, the free vibration and bending behaviors of variable shape tri-directional functionally graded material in thermal environments are analyzed. To replace the time-consuming numerical calculation process, a three-dimensional convolutional neural network is introduced for the first time to construct a rapid performance prediction platform with ultra-high accuracy. Additionally, the multi-objective optimization of the material distribution and shape of tri-directional functionally graded material is realized by combining the non-dominated sorting genetic algorithm III. The framework’s effectiveness is verified by several numerical cases, including square plates, cutout plates and cylindrical shells, and the effects of different boundary conditions, temperature fields, and loading conditions on the results are discussed in depth. The results show that, compared with traditional one-directional functionally graded material, the tri-directional functionally graded material with numerous design variables optimized by the proposed framework exhibits significantly improved performance, highlighting the efficiency and versatility of this framework.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"357 ","pages":"Article 118929"},"PeriodicalIF":6.3,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Rationalized equivalence method for high-velocity impacts of composite and metal panels

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2025-02-04 DOI: 10.1016/j.compstruct.2025.118910

Chunlin Du , Junchao Cao , Yejie Qiao , Zhenqiang Zhao , Jun Xing , Chao Zhang

Carbon fibre-reinforced polymer (CFRP) composites and metals materials are widely used for impact protection of aerospace structures. This study aims to compare the energy absorption characteristics of metal panels and composite panels and to establish a method to compare the equivalence of impacts. A novel method for assessing the equivalence of impact energies of metallic and composite materials was developed and validated. This method demonstrates high accuracy in predicting the energy absorption equivalence of Al2024 and Ti64 panels of varying thicknesses to composite panels under different impact velocities. The experimental and numerical results confirm the predictive accuracy of the theoretical model. By combining experimental data with validated numerical model calculations for heterogeneous materials, the method efficiently determines the unknown parameters in the formulation, enabling equivalent thickness values for metal target panels to be derived across a broad range of impact velocities. The dimensionless area density ratio Π_AD and velocity ratio Π_V are introduced to describe the relationship between normalized thickness and velocity. This comparison reveals that Ti64 exhibits greater impact resistance compared to Al2024, and CFRP woven laminate panels outperform both Ti64 and Al2024 panels in energy absorption when area density ratio Π_AD > 1.

{"title":"Rationalized equivalence method for high-velocity impacts of composite and metal panels","authors":"Chunlin Du , Junchao Cao , Yejie Qiao , Zhenqiang Zhao , Jun Xing , Chao Zhang","doi":"10.1016/j.compstruct.2025.118910","DOIUrl":"10.1016/j.compstruct.2025.118910","url":null,"abstract":"<div><div>Carbon fibre-reinforced polymer (CFRP) composites and metals materials are widely used for impact protection of aerospace structures. This study aims to compare the energy absorption characteristics of metal panels and composite panels and to establish a method to compare the equivalence of impacts. A novel method for assessing the equivalence of impact energies of metallic and composite materials was developed and validated. This method demonstrates high accuracy in predicting the energy absorption equivalence of Al2024 and Ti64 panels of varying thicknesses to composite panels under different impact velocities. The experimental and numerical results confirm the predictive accuracy of the theoretical model. By combining experimental data with validated numerical model calculations for heterogeneous materials, the method efficiently determines the unknown parameters in the formulation, enabling equivalent thickness values for metal target panels to be derived across a broad range of impact velocities. The dimensionless area density ratio Π<em><sub>AD</sub></em> and velocity ratio Π<em><sub>V</sub></em> are introduced to describe the relationship between normalized thickness and velocity. This comparison reveals that Ti64 exhibits greater impact resistance compared to Al2024, and CFRP woven laminate panels outperform both Ti64 and Al2024 panels in energy absorption when area density ratio Π<em><sub>AD</sub></em> > 1.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"357 ","pages":"Article 118910"},"PeriodicalIF":6.3,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143348736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

首页上一页

类型

全部化学•材料生命科学医学物理工程技术环境•农林材料科学地球科学法学管理学化学环境科学与生态学计算机科学教育学经济学农林科学人文科学生物学数学物理与天体物理心理学综合性期刊其他工业工程理学历史学农学文学信息工程

数据库

全部 ACS Publications Elsevier ieeexplore Springer The Royal Society of Chemistry Wiley

期刊

Composite Structures

全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.

﹀