The hybridization of nanofillers into glass fibre reinforcement is a promising strategy to improve the properties of the composite materials. The study aims to investigate the properties of hybrid nanocomposites consisting of multi-walled carbon nanotube (MWCNT)/woven glass/epoxy composites. The effect of different fabrication methods and different types of epoxy matrices was also investigated. For method 1, MWCNT was mixed with epoxy and impregnated into 3-ply woven glass fabrics using the hand lay-up method, followed by a vacuum bagging process. Meanwhile, for method 2, the woven glass fabrics were spray coated with MWCNT aqueous suspension and 3-ply woven glass fabrics were stacked together and impregnated with epoxy using the hand lay-up method followed by vacuum bagging. Results showed that composite laminates prepared by method 2 with 0.5 wt% MWCNT exhibit higher impact and flexural strength with 32.9% and 29% increments compared to method 1, respectively. Based on the flammability test, it was observed that hybrid laminate composites fabricated by both methods could self-extinguish. It was found that hybrid laminated composites using bisphenol A as an epoxy matrix show higher impact strength and flexural strength with 20.7% and 12% increments compared to epoxy bio-resins, respectively.
{"title":"Multi-walled carbon nanotubes/woven glass/epoxy hybrid nanocomposites: Effect of fabrication methods and types of epoxy matrices","authors":"Nik Amira Natasha Nik Amrul Faaizol, Mariatti Mustapha, Nik Akmar Rejab, Henri Vahabi","doi":"10.1177/07316844241252321","DOIUrl":"https://doi.org/10.1177/07316844241252321","url":null,"abstract":"The hybridization of nanofillers into glass fibre reinforcement is a promising strategy to improve the properties of the composite materials. The study aims to investigate the properties of hybrid nanocomposites consisting of multi-walled carbon nanotube (MWCNT)/woven glass/epoxy composites. The effect of different fabrication methods and different types of epoxy matrices was also investigated. For method 1, MWCNT was mixed with epoxy and impregnated into 3-ply woven glass fabrics using the hand lay-up method, followed by a vacuum bagging process. Meanwhile, for method 2, the woven glass fabrics were spray coated with MWCNT aqueous suspension and 3-ply woven glass fabrics were stacked together and impregnated with epoxy using the hand lay-up method followed by vacuum bagging. Results showed that composite laminates prepared by method 2 with 0.5 wt% MWCNT exhibit higher impact and flexural strength with 32.9% and 29% increments compared to method 1, respectively. Based on the flammability test, it was observed that hybrid laminate composites fabricated by both methods could self-extinguish. It was found that hybrid laminated composites using bisphenol A as an epoxy matrix show higher impact strength and flexural strength with 20.7% and 12% increments compared to epoxy bio-resins, respectively.","PeriodicalId":16943,"journal":{"name":"Journal of Reinforced Plastics and Composites","volume":"12 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140939008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The intuitive knowledge is that the mechanical modulus of unidirectional fiber-reinforced composites (UD-FRPs) decreases with higher fiber orientation angles. However, numerical results in this work and experimental results in previous literature indicate that the mechanical response of UD-FRPs has a U-shaped dependence on fiber orientation angle. To explain this phenomenon, we develop an anisotropic model to capture the mechanical behavior of UD-FRPs. The strain energy is decomposed into four components: matrix, fiber, fiber-matrix normal, and shear interactions. Each component can be determined by matching the mechanical responses of unit cells with 0°, 45°, and 90° off-axis. The results obtained from the presented model match well with the numerical response of unit cells with 15°, 30°, 60°, and 75° off-axis. With an increasing fiber orientation angle, the matrix part remains unchanged, the fiber component decreases, but the fiber-matrix normal component increases, and the fiber-matrix shear component increases and then decreases. The change in strain energy contributions explains the mechanism of the U-shaped dependence of the mechanical response on fiber orientation angle.
直观的认识是，单向纤维增强复合材料（UD-FRP）的机械模量随着纤维取向角的增大而减小。然而，本研究的数值结果和以往文献中的实验结果表明，UD-FRP 的机械响应与纤维取向角呈 U 型关系。为了解释这一现象，我们建立了一个各向异性模型来捕捉 UD-FRP 的力学行为。应变能被分解为四个部分：基体、纤维、纤维-基体法向和剪切相互作用。每个分量都可以通过匹配离轴 0°、45° 和 90°的单元格的机械响应来确定。该模型得出的结果与偏离轴线 15°、30°、60° 和 75°的单元格的数值响应十分吻合。随着纤维取向角的增大，基体部分保持不变，纤维分量减小，但纤维-基体法向分量增大，纤维-基体剪切分量先增大后减小。应变能贡献的变化解释了机械响应与纤维取向角呈 U 型关系的机理。
{"title":"Model prediction of unidirectional fiber-reinforced composites under finite deformation","authors":"Xing Lu, Jianhui Wei, Wei Zhao, Wenwu Zhang, Helezi Zhou, Zinan Liu, Xiongqi Peng, Zhigao Huang, Huamin Zhou","doi":"10.1177/07316844241252045","DOIUrl":"https://doi.org/10.1177/07316844241252045","url":null,"abstract":"The intuitive knowledge is that the mechanical modulus of unidirectional fiber-reinforced composites (UD-FRPs) decreases with higher fiber orientation angles. However, numerical results in this work and experimental results in previous literature indicate that the mechanical response of UD-FRPs has a U-shaped dependence on fiber orientation angle. To explain this phenomenon, we develop an anisotropic model to capture the mechanical behavior of UD-FRPs. The strain energy is decomposed into four components: matrix, fiber, fiber-matrix normal, and shear interactions. Each component can be determined by matching the mechanical responses of unit cells with 0°, 45°, and 90° off-axis. The results obtained from the presented model match well with the numerical response of unit cells with 15°, 30°, 60°, and 75° off-axis. With an increasing fiber orientation angle, the matrix part remains unchanged, the fiber component decreases, but the fiber-matrix normal component increases, and the fiber-matrix shear component increases and then decreases. The change in strain energy contributions explains the mechanism of the U-shaped dependence of the mechanical response on fiber orientation angle.","PeriodicalId":16943,"journal":{"name":"Journal of Reinforced Plastics and Composites","volume":"46 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140938974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-08DOI: 10.1177/07316844241252491
Zhao Wang, Baolin Wan, Qingfeng Xu
Due to environment and recycling concerns, interest in applying natural fiber reinforced polymer (NFRP) as an alternative for glass/carbon FRP to strengthen concrete structures has been increasing. This study developed a 3D nonlinear finite element (FE) model for laminated bamboo (LB) plate strengthened prestressed concrete slab. By involving temperature load on defined temperature sensitive material, the proposed model provided good simulation of prestressing process. The accuracy of the developed model was confirmed through comparisons with experimental data, representing peak load discrepancies of only 6.5% and 8.2% for un-strengthened and strengthened slabs, respectively. The parametric study examined the impact of LB plate dimensions and tensile strength, alongside the use of FRP wraps, on concrete slab performance. The results show that the 15 mm thick LB plate can enhance the slab’s peak load by 83.2%. Variations in LB plate tensile strength by up to 10% do not significantly affect the performance of the strengthened prestressed concrete. The increases of the peak load for strengthened cases with LB plate width of 150 mm, 300 mm and 460 mm were 29.4%, 41.9% and 50.2%, respectively. It also shows that FRP end wraps can increase the performance of thick LB plate strengthened prestressed concrete slab.
{"title":"3D nonlinear finite element investigation of laminated bamboo plate strengthened prestressed concrete slab","authors":"Zhao Wang, Baolin Wan, Qingfeng Xu","doi":"10.1177/07316844241252491","DOIUrl":"https://doi.org/10.1177/07316844241252491","url":null,"abstract":"Due to environment and recycling concerns, interest in applying natural fiber reinforced polymer (NFRP) as an alternative for glass/carbon FRP to strengthen concrete structures has been increasing. This study developed a 3D nonlinear finite element (FE) model for laminated bamboo (LB) plate strengthened prestressed concrete slab. By involving temperature load on defined temperature sensitive material, the proposed model provided good simulation of prestressing process. The accuracy of the developed model was confirmed through comparisons with experimental data, representing peak load discrepancies of only 6.5% and 8.2% for un-strengthened and strengthened slabs, respectively. The parametric study examined the impact of LB plate dimensions and tensile strength, alongside the use of FRP wraps, on concrete slab performance. The results show that the 15 mm thick LB plate can enhance the slab’s peak load by 83.2%. Variations in LB plate tensile strength by up to 10% do not significantly affect the performance of the strengthened prestressed concrete. The increases of the peak load for strengthened cases with LB plate width of 150 mm, 300 mm and 460 mm were 29.4%, 41.9% and 50.2%, respectively. It also shows that FRP end wraps can increase the performance of thick LB plate strengthened prestressed concrete slab.","PeriodicalId":16943,"journal":{"name":"Journal of Reinforced Plastics and Composites","volume":"6 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140938917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-07DOI: 10.1177/07316844241248241
Liulan Lin, Chenchen Fan, Haodong Zhang, Yi Xu
Based on the research of Polyvinyl alcohol (PVA)/Waterborne Polyurethane (WPU)/Short Carbon Fibers (SCFs) novel electrochemically shape memory composites, this study delved into an exploration of factors influencing the shape memory deformation of shape memory film samples when subjected to voltage stimulation. These main affecting factors encompassed sample thickness, activation voltage, and wire layout. Subsequently, based on the above conclusions, the viscoelastic constitutive model of PVA/WPU/SCFs composite was established based on Maxwell model and the deformation deflection of the composite film was predicted by shape memory recovery, and the electrothermal coupling simulation analysis and shape memory recovery and deformation simulation verification were carried out. Finally, based on the shape memory recovery performance of the composite film, a new reciprocating moving deformation structure was conceptualized, characterized by distinct cycles of motion, each analyzed individually.
{"title":"Electric-driven shape memory deformation control and verification of composite films based on PVA/WPU/SCFs","authors":"Liulan Lin, Chenchen Fan, Haodong Zhang, Yi Xu","doi":"10.1177/07316844241248241","DOIUrl":"https://doi.org/10.1177/07316844241248241","url":null,"abstract":"Based on the research of Polyvinyl alcohol (PVA)/Waterborne Polyurethane (WPU)/Short Carbon Fibers (SCFs) novel electrochemically shape memory composites, this study delved into an exploration of factors influencing the shape memory deformation of shape memory film samples when subjected to voltage stimulation. These main affecting factors encompassed sample thickness, activation voltage, and wire layout. Subsequently, based on the above conclusions, the viscoelastic constitutive model of PVA/WPU/SCFs composite was established based on Maxwell model and the deformation deflection of the composite film was predicted by shape memory recovery, and the electrothermal coupling simulation analysis and shape memory recovery and deformation simulation verification were carried out. Finally, based on the shape memory recovery performance of the composite film, a new reciprocating moving deformation structure was conceptualized, characterized by distinct cycles of motion, each analyzed individually.","PeriodicalId":16943,"journal":{"name":"Journal of Reinforced Plastics and Composites","volume":"37 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140938924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study explores the potential utilization of garnet waste, a byproduct of the Abrasive Water Jet Machining process, as a promising filler material in composite manufacturing. The disposal of garnet waste presents significant environmental and economic challenges, underscoring the need for sustainable waste management strategies. To tackle these challenges, this research investigates the incorporation of garnet waste into composites to create value-added materials. Consequently, the study focused on developing garnet-filled jute fibre-reinforced vinyl ester composites using the hand layup method. Various mechanical properties including flexural strength, tensile strength, hardness, and impact strength were assessed. The findings demonstrate that the inclusion of garnet filler enhances the mechanical strength of the composites. Particularly, composites containing 10 wt% garnet exhibit notable improvements in tensile, flexural, impact, and hardness strengths, with increases of 40%, 124%, 26%, and 15%, respectively. This research has the potential to advance the development of advanced materials across diverse industries, marking a significant stride towards sustainable and value-driven composite manufacturing practices.
{"title":"Mechanical investigation for enhancing jute fibre vinyl ester composite performance through garnet waste utilization","authors":"Sundarakannan Rajendran, Geetha Palani, Yo-Lun Yang, Arumugaprabu Veerasimman, Vigneshwaran Shanmugam, Uthayakumar Marimuthu, Karthik Kannan","doi":"10.1177/07316844241252318","DOIUrl":"https://doi.org/10.1177/07316844241252318","url":null,"abstract":"This study explores the potential utilization of garnet waste, a byproduct of the Abrasive Water Jet Machining process, as a promising filler material in composite manufacturing. The disposal of garnet waste presents significant environmental and economic challenges, underscoring the need for sustainable waste management strategies. To tackle these challenges, this research investigates the incorporation of garnet waste into composites to create value-added materials. Consequently, the study focused on developing garnet-filled jute fibre-reinforced vinyl ester composites using the hand layup method. Various mechanical properties including flexural strength, tensile strength, hardness, and impact strength were assessed. The findings demonstrate that the inclusion of garnet filler enhances the mechanical strength of the composites. Particularly, composites containing 10 wt% garnet exhibit notable improvements in tensile, flexural, impact, and hardness strengths, with increases of 40%, 124%, 26%, and 15%, respectively. This research has the potential to advance the development of advanced materials across diverse industries, marking a significant stride towards sustainable and value-driven composite manufacturing practices.","PeriodicalId":16943,"journal":{"name":"Journal of Reinforced Plastics and Composites","volume":"22 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140938926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-07DOI: 10.1177/07316844241250186
Jianguo Liang, Chunxiang Miao, Yinhui Li, Jun Feng, Qi Wu, Chunjiang Zhao, Zhaotun Jia, Kun Yang, Zemin Ning, Yuqin Xue
The application of composite winding pressure vessels is becoming more and more widespread, and the magnitude of deformation during curing can have a significant impact on service performance, but there are fewer studies on the accurate prediction of the numerical and experimental validation of the deformation during the curing process of pressure vessels. To accurately predict the effect of different angles of layup on the curing deformation of high-pressure hydrogen storage vessels made of T700S-12 K/4251A4B2 carbon fiber/epoxy composites in cylindrical and dome sections. In this paper, WCM-ABAQUS segmented pressure vessel accurate modeling method is proposed for the first time, using the method of converting the chemical shrinkage coefficient of epoxy resin into thermal expansion coefficient equivalently, the finite element prediction of the deformation of the pressure vessel during the curing process in different layup sequences was carried out, and the deformation values of the pressure vessel in different layup sequences were analyzed comparatively. Finally, the winding curing experiments were carried out on pressure vessels with different layup sequences, and the curing deformation values of the experimental tests on pressure vessels with different layup sequences were compared with the finite element simulation values, respectively, and the minimum error value 13.07%. It provides a reliable basis for accurately predicting the deformation value of the pressure vessel curing process, and also provides a reference for subsequent experiments to reduce the curing deformation value.
{"title":"Effect of layup sequence on cure deformation and accurate prediction of composite pressure vessels","authors":"Jianguo Liang, Chunxiang Miao, Yinhui Li, Jun Feng, Qi Wu, Chunjiang Zhao, Zhaotun Jia, Kun Yang, Zemin Ning, Yuqin Xue","doi":"10.1177/07316844241250186","DOIUrl":"https://doi.org/10.1177/07316844241250186","url":null,"abstract":"The application of composite winding pressure vessels is becoming more and more widespread, and the magnitude of deformation during curing can have a significant impact on service performance, but there are fewer studies on the accurate prediction of the numerical and experimental validation of the deformation during the curing process of pressure vessels. To accurately predict the effect of different angles of layup on the curing deformation of high-pressure hydrogen storage vessels made of T700S-12 K/4251A4B2 carbon fiber/epoxy composites in cylindrical and dome sections. In this paper, WCM-ABAQUS segmented pressure vessel accurate modeling method is proposed for the first time, using the method of converting the chemical shrinkage coefficient of epoxy resin into thermal expansion coefficient equivalently, the finite element prediction of the deformation of the pressure vessel during the curing process in different layup sequences was carried out, and the deformation values of the pressure vessel in different layup sequences were analyzed comparatively. Finally, the winding curing experiments were carried out on pressure vessels with different layup sequences, and the curing deformation values of the experimental tests on pressure vessels with different layup sequences were compared with the finite element simulation values, respectively, and the minimum error value 13.07%. It provides a reliable basis for accurately predicting the deformation value of the pressure vessel curing process, and also provides a reference for subsequent experiments to reduce the curing deformation value.","PeriodicalId":16943,"journal":{"name":"Journal of Reinforced Plastics and Composites","volume":"138 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140938918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
With the rapid development of the transportation and electronic equipment industries, the demand for robust joining technology for metal/polymer has become imperative, especially in the pursuit of lightweight solutions. Underwater welding is one of the methods to reduce the formation of holes and other welding defects, which is conducive to improve the quality and strength of joints. In this study, the underwater friction stir lap welding (UFSLW) of 6061-T6 Al alloy and carbon fiber reinforced thermoplastic (CFRTP) joints is investigated. The welds are evaluated by optical microscope (OM) image, scanning electron microscope (SEM), and energy dispersive X-ray spectrometer (EDS) of the fracture, tensile, and hardness analysis. Research reveals that the presence of cracks and tunnel defects similar to those in air FSLW (AFSLW) is reduced in the underwater welding process. From the microscopic result analysis, the rapid dissipation of frictional heat and substrate viscosity in the cooling medium of circulating water in the stirring zone reduces the interaction between Al alloy and molten CFRTP, which leads to the rapid transformation of the plasticized material into a solid state and reduces the formation of thick stacked layer. In addition, finer Al alloy fragments are obtained in the welding zone due to the fast cooling rate. Ultimately, the maximum tensile strength of 32.12 MPa is achieved, which is 10.76% higher than that of the same welding parameters in air. Based on UFSLW technology, the joint strength of this study is 69% higher than that of Al alloy and polymer joints, which demonstrates enormous application potential and opens up new prospects for the joining technology of dissimilar materials.
随着交通运输和电子设备行业的快速发展，对金属/聚合物的坚固连接技术的需求已变得势在必行，尤其是在追求轻量化解决方案方面。水下焊接是减少孔洞和其他焊接缺陷形成的方法之一，有利于提高接头的质量和强度。本研究探讨了 6061-T6 Al 合金与碳纤维增强热塑性塑料（CFRTP）接头的水下搅拌摩擦搭接焊（UFSLW）。通过光学显微镜（OM）图像、扫描电子显微镜（SEM）和能量色散 X 射线光谱仪（EDS）的断裂、拉伸和硬度分析对焊缝进行了评估。研究结果表明，在水下焊接过程中，与空气无缝钢管焊接（AFSLW）类似的裂纹和隧道缺陷减少了。从微观结果分析，搅拌区循环水冷却介质中摩擦热和基体粘度的快速消散减少了铝合金与熔融 CFRTP 之间的相互作用，从而导致塑化材料快速转变为固态，并减少了厚堆叠层的形成。此外，由于冷却速度快，焊接区的铝合金碎片更细。最终，最大拉伸强度达到 32.12 兆帕，比空气中相同焊接参数的拉伸强度高出 10.76%。基于超临界低温焊接技术，本研究的接头强度比铝合金和聚合物接头强度高出 69%，显示出巨大的应用潜力，为异种材料的连接技术开辟了新的前景。
{"title":"Underwater dissimilar friction stir lap welding of aluminum alloy and CFRTP","authors":"Yuan Zhang, Yibo Sun, Yong Liu, Kainan Guan, Xiao Wei, Xinhua Yang","doi":"10.1177/07316844241252050","DOIUrl":"https://doi.org/10.1177/07316844241252050","url":null,"abstract":"With the rapid development of the transportation and electronic equipment industries, the demand for robust joining technology for metal/polymer has become imperative, especially in the pursuit of lightweight solutions. Underwater welding is one of the methods to reduce the formation of holes and other welding defects, which is conducive to improve the quality and strength of joints. In this study, the underwater friction stir lap welding (UFSLW) of 6061-T6 Al alloy and carbon fiber reinforced thermoplastic (CFRTP) joints is investigated. The welds are evaluated by optical microscope (OM) image, scanning electron microscope (SEM), and energy dispersive X-ray spectrometer (EDS) of the fracture, tensile, and hardness analysis. Research reveals that the presence of cracks and tunnel defects similar to those in air FSLW (AFSLW) is reduced in the underwater welding process. From the microscopic result analysis, the rapid dissipation of frictional heat and substrate viscosity in the cooling medium of circulating water in the stirring zone reduces the interaction between Al alloy and molten CFRTP, which leads to the rapid transformation of the plasticized material into a solid state and reduces the formation of thick stacked layer. In addition, finer Al alloy fragments are obtained in the welding zone due to the fast cooling rate. Ultimately, the maximum tensile strength of 32.12 MPa is achieved, which is 10.76% higher than that of the same welding parameters in air. Based on UFSLW technology, the joint strength of this study is 69% higher than that of Al alloy and polymer joints, which demonstrates enormous application potential and opens up new prospects for the joining technology of dissimilar materials.","PeriodicalId":16943,"journal":{"name":"Journal of Reinforced Plastics and Composites","volume":"42 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140882592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-06DOI: 10.1177/07316844241248870
Juan P Ojeda, Irma T Mercante, Fernanda M de Borbón, Raúl Zerbino, María C Torrijos, Graciela Giaccio
Recycled fibers are of interest to produce fiber reinforced cement composites while reducing some environmental impacts such as waste disposal and raw materials consumption. In this paper, four plastic and three steel fibers obtained from waste were studied. The aim of this article was to characterize their pull-out response. Recycled steel fibers were recovered from tires, while one plastic fiber was produced from straps and three fibers were fabricated from PET bottles with different shapes to compare the effects of geometry. Recycled steel fibers showed higher adhesion and strain energy density than plastic ones. The adhesion and elastic modulus of these recycled steel fibers are of interest for fiber reinforced mortar and concrete applications, while plastic fibers could contribute to improve cohesion and to mitigate shrinkage cracking at early ages.
回收纤维在生产纤维增强水泥复合材料方面具有重要意义，同时还能减少废物处理和原材料消耗等对环境的影响。本文研究了从废弃物中提取的四种塑料纤维和三种钢纤维。本文的目的是描述它们的拉出响应特性。回收的钢纤维是从轮胎中回收的，而一种塑料纤维是用带子制成的，三种纤维是用不同形状的 PET 瓶制成的，以比较几何形状的影响。与塑料纤维相比，回收钢纤维显示出更高的粘附力和应变能密度。这些回收钢纤维的附着力和弹性模量对纤维增强砂浆和混凝土的应用很有意义，而塑料纤维则有助于提高内聚力和减少早期收缩开裂。
{"title":"Pull-out performance of plastic and steel fibers recycled from waste","authors":"Juan P Ojeda, Irma T Mercante, Fernanda M de Borbón, Raúl Zerbino, María C Torrijos, Graciela Giaccio","doi":"10.1177/07316844241248870","DOIUrl":"https://doi.org/10.1177/07316844241248870","url":null,"abstract":"Recycled fibers are of interest to produce fiber reinforced cement composites while reducing some environmental impacts such as waste disposal and raw materials consumption. In this paper, four plastic and three steel fibers obtained from waste were studied. The aim of this article was to characterize their pull-out response. Recycled steel fibers were recovered from tires, while one plastic fiber was produced from straps and three fibers were fabricated from PET bottles with different shapes to compare the effects of geometry. Recycled steel fibers showed higher adhesion and strain energy density than plastic ones. The adhesion and elastic modulus of these recycled steel fibers are of interest for fiber reinforced mortar and concrete applications, while plastic fibers could contribute to improve cohesion and to mitigate shrinkage cracking at early ages.","PeriodicalId":16943,"journal":{"name":"Journal of Reinforced Plastics and Composites","volume":"62 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140882742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nowadays, synthetic fibres are replaced with hybrid composite fibres which consist of low energy production, biodegradability, resource renewability, less hazardous and easy handling of manufactured composites. The present work focuses on the effect of microcrystalline cellulose (MCC) particles by varying the percentage concentration (0 wt %, 2 wt % and 4 wt %) in the flax-jute-epoxy composite materials. The MCC particle is mixed with epoxy resin as matrix material and flax-jute fibres as reinforcements in the composite panels fabricated using the vacuum bagging method. The tensile, flexural, impact, hardness and thermogravimetric tests were performed on the fabricated composite panels per the ASTM standard. The experimental results show that with the addition of 2 wt % MCC particle, sample 2 has higher tensile strength, flexural strength and impact strength than sample 1 (0 wt % MCC) and sample 3 (4 wt % MCC). It can be noted that due to the addition of MCC particles, overall mechanical properties improved as a result of good interfacial bonding between matrix and fibres which are evident through SEM analysis. Similarly, thermal stability of the composites also improved in the flax-jute hybrid fibre composites particularly in 2 wt % MCC.
{"title":"Effect of microcrystalline cellulose on mechanical properties of flax-jute-epoxy hybrid composite materials using vacuum bagging","authors":"Dharmalingam Ganesan, Arun Prasad Murali, Sachin Salunkhe, Hariprasad Tarigonda, Vishal Naranje","doi":"10.1177/07316844241247887","DOIUrl":"https://doi.org/10.1177/07316844241247887","url":null,"abstract":"Nowadays, synthetic fibres are replaced with hybrid composite fibres which consist of low energy production, biodegradability, resource renewability, less hazardous and easy handling of manufactured composites. The present work focuses on the effect of microcrystalline cellulose (MCC) particles by varying the percentage concentration (0 wt %, 2 wt % and 4 wt %) in the flax-jute-epoxy composite materials. The MCC particle is mixed with epoxy resin as matrix material and flax-jute fibres as reinforcements in the composite panels fabricated using the vacuum bagging method. The tensile, flexural, impact, hardness and thermogravimetric tests were performed on the fabricated composite panels per the ASTM standard. The experimental results show that with the addition of 2 wt % MCC particle, sample 2 has higher tensile strength, flexural strength and impact strength than sample 1 (0 wt % MCC) and sample 3 (4 wt % MCC). It can be noted that due to the addition of MCC particles, overall mechanical properties improved as a result of good interfacial bonding between matrix and fibres which are evident through SEM analysis. Similarly, thermal stability of the composites also improved in the flax-jute hybrid fibre composites particularly in 2 wt % MCC.","PeriodicalId":16943,"journal":{"name":"Journal of Reinforced Plastics and Composites","volume":"46 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140839263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-29DOI: 10.1177/07316844241250183
Zi-Lin Zhang, Xian Li, Tao Zhou
The application of precast segmental bridge columns (PSBCs) is still restricted in seismicity areas due to concerns such as lower lateral stiffness and column base bearing capacity. To enhance the applicability of PSBCs, this study proposed a novel approach of confining them with grouted GFRP tubes. Four novel and one reference specimens were tested under low cyclic loading to evaluate the effects of energy dissipation (ED) bars ratios, concrete interlayer strength, type of segment concrete, and concrete pouring methods within the outer GFRP tube (OGT) on the seismic behavior. Experimental results reveal that the failure modes of all specimens were triggered by the yielding of ED bars and the break of OGT at the top of ED bars. No crushed concrete at column bases or cracks at the segment joint were observed during the test due to the good confinement of GFRP tubes. All the specimens exhibited stable hysteretic behavior with small residual drift ratios and low strength degradation. Furthermore, finite element models (FEMs) were generated to predict the hysteretic behavior of novel specimens. The effects of some parameters such as OGT thickness, ED bars diameter, and concrete strength were further studied.
由于横向刚度和柱基承载力较低等原因，预制节段式桥梁柱（PSBC）在地震多发地区的应用仍然受到限制。为了提高 PSBC 的适用性，本研究提出了一种用灌浆 GFRP 管对其进行约束的新方法。在低循环荷载下测试了四个新型试件和一个参考试件，以评估消能杆（ED）比率、混凝土夹层强度、分段混凝土类型以及外GFRP管（OGT）内混凝土浇筑方法对地震行为的影响。实验结果表明，所有试件的破坏模式都是由 ED 杆件的屈服和 ED 杆件顶部 OGT 的断裂引发的。由于 GFRP 管具有良好的密闭性，因此在试验过程中未观察到柱基混凝土破碎或分段连接处出现裂缝。所有试样都表现出稳定的滞后行为，残余漂移比小，强度退化程度低。此外，还生成了有限元模型（FEM）来预测新型试样的滞回行为。此外，还进一步研究了 OGT 厚度、ED 杆直径和混凝土强度等参数的影响。
{"title":"Seismic behavior of precast segmental bridge columns confined by grouted glass fiber reinforced plastic tubes","authors":"Zi-Lin Zhang, Xian Li, Tao Zhou","doi":"10.1177/07316844241250183","DOIUrl":"https://doi.org/10.1177/07316844241250183","url":null,"abstract":"The application of precast segmental bridge columns (PSBCs) is still restricted in seismicity areas due to concerns such as lower lateral stiffness and column base bearing capacity. To enhance the applicability of PSBCs, this study proposed a novel approach of confining them with grouted GFRP tubes. Four novel and one reference specimens were tested under low cyclic loading to evaluate the effects of energy dissipation (ED) bars ratios, concrete interlayer strength, type of segment concrete, and concrete pouring methods within the outer GFRP tube (OGT) on the seismic behavior. Experimental results reveal that the failure modes of all specimens were triggered by the yielding of ED bars and the break of OGT at the top of ED bars. No crushed concrete at column bases or cracks at the segment joint were observed during the test due to the good confinement of GFRP tubes. All the specimens exhibited stable hysteretic behavior with small residual drift ratios and low strength degradation. Furthermore, finite element models (FEMs) were generated to predict the hysteretic behavior of novel specimens. The effects of some parameters such as OGT thickness, ED bars diameter, and concrete strength were further studied.","PeriodicalId":16943,"journal":{"name":"Journal of Reinforced Plastics and Composites","volume":"5 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140839146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：