Composites Part A: Applied Science and Manufacturing最新文献_第5页

A Multi-Step approach for the chemical recycling of Flame-Retardant PBT Composites: Environmental and economic benefits 阻燃PBT复合材料化学回收的多步骤方法：环境和经济效益

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2026-04-01 Epub Date: 2026-01-09 DOI: 10.1016/j.compositesa.2026.109568

Qiang Zhang , Bo Wu , Yujun Chen , Guiquan Liao , Xiaoqiong Xie , Yu-Zhong Wang

{"title":"A Multi-Step approach for the chemical recycling of Flame-Retardant PBT Composites: Environmental and economic benefits","authors":"Qiang Zhang , Bo Wu , Yujun Chen , Guiquan Liao , Xiaoqiong Xie , Yu-Zhong Wang","doi":"10.1016/j.compositesa.2026.109568","DOIUrl":"10.1016/j.compositesa.2026.109568","url":null,"abstract":"<div><div>The extensive use of flame-retardant polyester composites, notably polybutylene terephthalate (polybutylene terephthalate, PBT), has resulted in a growing accumulation of non-biodegradable plastic waste, posing significant challenges to both environmental sustainability and resource recovery. These materials, which contain brominated flame retardants and inorganic fillers, are resistant to conventional recycling methods, contributing to long-term ecological risks. In this study, we propose a comprehensive chemical recycling strategy for post-consumer flame-retardant PBT composite materials (PBT-FrCM), integrating staged depolymerization, solvent extraction, and monomer purification to achieve efficient recovery and reuse of all major components. The recovered monomer, bis(4-hydroxybutyl) terephthalate (BHBT) (99.7% purity), brominated flame retardants (99% recovery), and inorganic fillers were successfully reintegrated into regenerated flame-retardant PBT composites (rPBT-FrCM) that exhibit mechanical and flame-retardant properties comparable to those of virgin materials. Life cycle assessment demonstrates that the process reduces greenhouse gas emissions, while highlighting energy consumption and solvent toxicity as key areas for improvement. An economic evaluation indicates that recycling 1 tonne of waste PBT generates a net value of 5041 CNY, illustrating the dual environmental and economic benefits of this approach. These findings underscore the potential of closed-loop upcycling for engineering plastics and provide a scalable pathway toward a more circular, climate-resilient material economy.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"203 ","pages":"Article 109568"},"PeriodicalIF":8.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145974278","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

In-situ photothermal dual-curing of continuous SiC fiber-reinforced thermoset composite via additive manufacturing and post thermal treatment 连续SiC纤维增强热固性复合材料的增材制造和后热处理原位光热双固化

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2026-04-01 Epub Date: 2026-01-18 DOI: 10.1016/j.compositesa.2026.109589

Ruikang Zhai , Jianzhong Chai , Chen Liang , Fang Li , Zihan Li , Jihong Zhu , Biao Zhang , Shangqin Yuan

{"title":"In-situ photothermal dual-curing of continuous SiC fiber-reinforced thermoset composite via additive manufacturing and post thermal treatment","authors":"Ruikang Zhai , Jianzhong Chai , Chen Liang , Fang Li , Zihan Li , Jihong Zhu , Biao Zhang , Shangqin Yuan","doi":"10.1016/j.compositesa.2026.109589","DOIUrl":"10.1016/j.compositesa.2026.109589","url":null,"abstract":"<div><div>Additive manufacturing (AM) of continuous fiber-reinforced composites enables the fabrication of lightweight and complex structures. However, only a few AM techniques can directly fabricate ceramic fiber–reinforced polymer composites, especially for continuous silicon carbide (SiC) fiber bundles, because SiC fiber bundles are brittle and break under the friction and tensile conditions of AM. Therefore, photothermally cured thermoset resins are proposed to be blended with SiC fiber bundles in in-situ impregnation and cured through a layer-by-layer manner. This study proposes a photothermal dual curing strategy integrating synchronized ultraviolet–infrared irradiation for the in-situ curing of SiC fiber–reinforced thermoset composites. The custom-built printing system used in this work can achieve stable fiber deposition and uniform cross-linking without molds or prepregs, as well as overcome poor impregnation and fiber–matrix interfacial defects. The process–structure–performance mapping of this novel process reveals a suitable strategy for balancing precision and efficiency. Post-curing reconstructs the cross-linked network, significantly enhancing stiffness and reducing energy dissipation. This work establishes a scalable route for the rapid fabrication of SiC composites with tunable fiber volume fraction ranging from 15% to 52%. This method provides a practical pathway for the fabrication of ceramic fiber–reinforced polymer composites and SiC ceramic green body with considerable potential advanced aerospace, thermal protection, and electromagnetic stealth applications.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"203 ","pages":"Article 109589"},"PeriodicalIF":8.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146035092","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

3D printed shape memory polyimide composite aerogels with CNT-directed thermal networks for rapid shape recovery 3D打印形状记忆聚酰亚胺复合气凝胶与碳纳米管定向热网络快速形状恢复

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2026-04-01 Epub Date: 2026-01-17 DOI: 10.1016/j.compositesa.2026.109586

Le Li, Xiang Wang, Chun Huang, Wei Chen, Ji Shi, Jian Meng, Tianxi Liu

{"title":"3D printed shape memory polyimide composite aerogels with CNT-directed thermal networks for rapid shape recovery","authors":"Le Li, Xiang Wang, Chun Huang, Wei Chen, Ji Shi, Jian Meng, Tianxi Liu","doi":"10.1016/j.compositesa.2026.109586","DOIUrl":"10.1016/j.compositesa.2026.109586","url":null,"abstract":"<div><div>Shape memory polyimide aerogels have attracted growing interest for aerospace applications due to their ultralight weight, high thermal stability, and programmable shape recovery behavior. However, their practical application remains limited due to the lack of fabrication methods capable of producing complex, customized architectures and the inherently low thermal conductivity that hinders efficient heat transfer and delays shape recovery. In this study, we report a direct ink writing (DIW) strategy to fabricate high-performance shape memory polyimide/carbon nanotube composite aerogels (PCCAs) that simultaneously address both issues. By tailoring the ratio of polyamic acid (PAA) to carbon nanotubes (CNTs), the composite ink achieves balanced rheological properties through hydrogen bonding and π-π interactions, enabling smooth extrusion and high-fidelity printing. During the DIW process, shear forces induce the alignment of CNTs along the printing path, constructing a three-dimensional, continuous thermal conduction network within the aerogel. This significantly enhances heat transfer efficiency and accelerates the shape recovery response. Meanwhile, the DIW approach allows for the programmable construction of aerogels with complex and application-specific architectures. The resulting PCCA exhibits rapid shape recovery, excellent shape fixity (∼94.2%), and recovery ratios (∼96.9%). This work offers a robust platform for designing next-generation adaptive materials for aerospace and beyond.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"203 ","pages":"Article 109586"},"PeriodicalIF":8.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146035211","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

A model for gap formation between dry preforms and curved tool surfaces in closed-mould composites manufacturing processes 闭模复合材料制造过程中干预制件与弯曲刀具表面间隙形成的模型

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2026-04-01 Epub Date: 2025-12-31 DOI: 10.1016/j.compositesa.2025.109548

Mikhail Y. Matveev, Andreas Endruweit

{"title":"A model for gap formation between dry preforms and curved tool surfaces in closed-mould composites manufacturing processes","authors":"Mikhail Y. Matveev, Andreas Endruweit","doi":"10.1016/j.compositesa.2025.109548","DOIUrl":"10.1016/j.compositesa.2025.109548","url":null,"abstract":"<div><div>The formation of a gap between the dry reinforcement and the tool surface at a bend, i.e. a geometrical feature with single curvature, in a tool for closed-mould manufacturing processes is caused by tensile forces in the reinforcement. The gap shape was analysed based on the mechanical model of an arched beam supported by an elastic foundation. The compaction stiffness of the reinforcement was derived from linearisation of the power-law approximating the reinforcement compression response. Fifth-order differential equations were derived and solved with the appropriate boundary conditions to find expressions for the local gap height. Applying a minimum-energy principle, the gap was found to typically extend into the flat sections of the geometry on both sides of the bend. Its size increases with increasing bend angle and applied force. It decreases with increasing bend radius, cavity height, level of pre-compaction, and stiffness of the reinforcement in compaction and in bending. If the gap height is expressed as a function of the fibre volume fraction, the correlation between the gap size and the fibre volume fraction was found to be negative if the tensile force is constant, and positive if the force increases with increasing fibre volume fraction. The solutions derived here allow the geometry of the gap and the bent preform to be described in more detail than in previous studies, which allows further analysis of the manufacturing process, e.g. predicting the effect of racetracking in the formed gap during a Resin Transfer Moulding process.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"203 ","pages":"Article 109548"},"PeriodicalIF":8.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145923014","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

Ferromagnetic amorphous microwire based metacomposite absorber for multi-field modulation and extreme environment applications 用于多场调制和极端环境应用的铁磁非晶微丝基超复合吸收材料

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2026-04-01 Epub Date: 2025-12-31 DOI: 10.1016/j.compositesa.2025.109549

Jing Yang , Changfeng Li , Jiaxin Liu , Xiong Lv , Yunlong Li , Yaqian Yang , Tangfeng Feng , Yunfei Wang , Baihong Chi , Faxiang Qin

{"title":"Ferromagnetic amorphous microwire based metacomposite absorber for multi-field modulation and extreme environment applications","authors":"Jing Yang , Changfeng Li , Jiaxin Liu , Xiong Lv , Yunlong Li , Yaqian Yang , Tangfeng Feng , Yunfei Wang , Baihong Chi , Faxiang Qin","doi":"10.1016/j.compositesa.2025.109549","DOIUrl":"10.1016/j.compositesa.2025.109549","url":null,"abstract":"<div><div>Modern electromagnetic protection and radar stealth technologies require microwave-absorbing materials that exhibit high integration, robust environmental adaptability, and tunability. However, current research focuses on individual properties, creating a significant gap in developing high-performance stealth structural components with integrated multifunctionality. To bridge this gap, we propose a novel metacomposite incorporating ferromagnetic amorphous microwires, resistive square-loops, and glass fiber-reinforced epoxy. This metacomposite demonstrates excellent stealth performance, mechanical strength, thermal resistance, and field-induced tunability. Fabricated via vacuum-assisted resin transfer molding (VARTM), the optimized metacomposite achieves over 60 % absorption across the entire X-band and more than 90 % within 9.7–11.9 GHz. It also exhibits great tensile strength (487.5 MPa in axial direction), impact resistance (energy dissipation value of 9 J), and thermal stability (glass transition temperature is 163.41 °C). Furthermore, under external magnetic and thermal fields, the absorption peak achieves a 2.31 GHz blue shift and a 0.25 GHz red shift, respectively. In future research, arbitrarily shaped structural components can also be fabricated via the VARTM process, overcoming the formability limitations of conventional stealth metamaterials. By combining broadband absorption, multi-field tunability, mechanical robustness, and thermal adaptability, the developed metacomposite shows promising potential for applications in radar stealth and electromagnetic protection, especially under extreme operating conditions.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"203 ","pages":"Article 109549"},"PeriodicalIF":8.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145923094","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

Effects of metal ions infiltration on degradation performances of the polypropylene-based cable semiconductive shielding layer 金属离子渗透对聚丙烯基电缆半导体屏蔽层降解性能的影响

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2026-04-01 Epub Date: 2026-01-22 DOI: 10.1016/j.compositesa.2026.109590

Cheng Tong , Xiyu Zhang , Shangshi Huang , Xiaoping Xiong , Yong Liang , Jun Hu , Qi Li , Jinliang He

{"title":"Effects of metal ions infiltration on degradation performances of the polypropylene-based cable semiconductive shielding layer","authors":"Cheng Tong , Xiyu Zhang , Shangshi Huang , Xiaoping Xiong , Yong Liang , Jun Hu , Qi Li , Jinliang He","doi":"10.1016/j.compositesa.2026.109590","DOIUrl":"10.1016/j.compositesa.2026.109590","url":null,"abstract":"<div><div>Polypropylene (PP) based power cables are recognized as a potential solution for large-capacity power transmission due to their superior electrical strength and high operating temperature. Evaluating the aging process of cable materials is crucial for safe operation. This paper focuses on the effect of metal involved aging process on the conductor shielding layer. Conducting the 27-day accelerated aging experiment, the influence of the contact of polypropylene-based shielding layer with Cu and Al conductors on degradation performances is compared and the effect of metal deactivator is assessed. The results show that the diffusion of copper ions and thermal oxidation reduce the thermal stability of the shielding layer and lead to a chemicrystallization effect. The aging effect is manifested macroscopically as the deterioration of mechanical properties and the increase in electrical resistivity. Cu-contacted samples perform severer degradation than Al-contacted samples. While the presence of metal deactivator greatly suppresses the diffusion of copper ions and inhibits their catalytic activity by forming complexes, making the degradation in Cu-contacted materials significantly reduced. Finally, a mechanism is developed to associate the macro-property reduction with the crystal structures variation during aging. This work provides a reference for evaluating the aging of PP cables and developing shielding materials.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"203 ","pages":"Article 109590"},"PeriodicalIF":8.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146073878","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

Grading evaluation criteria of drilling-induced damage in composites based on physics-constrained Gaussian process regression 基于物理约束高斯过程回归的复合材料钻井损伤分级评价标准

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2026-04-01 Epub Date: 2026-01-14 DOI: 10.1016/j.compositesa.2026.109572

Zhenwei Xie , Bing Wang , Zhanqiang Liu , Jinfu Zhao , Liyan Zheng , Pengyang Wang

{"title":"Grading evaluation criteria of drilling-induced damage in composites based on physics-constrained Gaussian process regression","authors":"Zhenwei Xie , Bing Wang , Zhanqiang Liu , Jinfu Zhao , Liyan Zheng , Pengyang Wang","doi":"10.1016/j.compositesa.2026.109572","DOIUrl":"10.1016/j.compositesa.2026.109572","url":null,"abstract":"<div><div>Different types of machining defects in composites may have significantly different effects on material mechanical properties, and even minor defects can lead to severe strength degradation. However, conventional evaluation methods for drilling-induced damage typically treat defects as a whole and quantify them based on geometric characteristics or empirical formulas, leading to unreliable strength assessment. To address this problem, a physics-constrained Gaussian process regression (PCGPR) framework is proposed to establish a quantitative mapping between defect features and material strength, providing data basis for developing damage evaluation criteria. Experimental validation on C/C-SiC composite specimens demonstrates that the proposed PCGPR achieves high predictive accuracy. Compared with the best-performing conventional data-driven model, prediction errors are reduced by approximately 35–40 %, and the explained variance is improved by about 0.1. Based on the predicted strength-reduction relationship, a three-level damage severity classification criterion is established by mapping defect severity to effective safety factors commonly adopted in aerospace structural design. The proposed framework provides a quantitative, physically consistent, and industrially applicable basis for damage assessment and decision-making regarding acceptance, inspection, and rejection of drilled composite components in safety–critical aerospace applications.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"203 ","pages":"Article 109572"},"PeriodicalIF":8.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146035206","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

Fiber-orientation Fe/Fe3O4@C@SiO2 heterostructures with magnetoelectric coupling and double-losses for effective microwave absorption 具有磁电耦合和双损耗的光纤取向Fe/Fe3O4@C@SiO2异质结构的有效微波吸收

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2026-04-01 Epub Date: 2026-01-06 DOI: 10.1016/j.compositesa.2026.109564

Le Gao , Shengzhe Zhao , Bo Xiong , Suyun Tian , Rui Zhou , Yang Guo , Xian Jian , Shaoming Dong

{"title":"Fiber-orientation Fe/Fe3O4@C@SiO2 heterostructures with magnetoelectric coupling and double-losses for effective microwave absorption","authors":"Le Gao , Shengzhe Zhao , Bo Xiong , Suyun Tian , Rui Zhou , Yang Guo , Xian Jian , Shaoming Dong","doi":"10.1016/j.compositesa.2026.109564","DOIUrl":"10.1016/j.compositesa.2026.109564","url":null,"abstract":"<div><div>Microwave absorbing materials face the challenge of dispersion and uniform orientation in the pursuit of coupling magnetic and electrical losses. Herein, fiber-orientation Fe/Fe<sub>3</sub>O<sub>4</sub>@CNFs@SiO<sub>2</sub> (FFCS) heterostructures are designed to possess magnetic and dielectric losses, enabling effective microwave absorption. For precise control, Fe/Fe<sub>3</sub>O<sub>4</sub> nanoparticles (∼30 nm) were uniformly embedded inside carbon nanofibers (CNFs, ∼400 nm) through electrospinning and subsequent carbonization to prepare Fe/Fe<sub>3</sub>O<sub>4</sub>@CNFs. Followed by SiO<sub>2</sub> coating, the FFCS heterostructures were obtained that feature an aligned-fiber architecture and a uniform dispersion of magnetic Fe/Fe<sub>3</sub>O<sub>4</sub> nanocrystals. This interconnected, high-density carbon conductive networks significantly enhance electron mobility, thereby promoting dielectric dissipation. Meanwhile, interfacial polarization arising from the multi-component heterointerfaces is finely tuned to optimize impedance matching. Then as-fabricated heterostructures exhibits synergistic superior microwave absorption performance. This FFCS exhibits a minimal reflection loss of −54.04 dB at a thickness of 1.32 mm, and the effective absorption bandwidth is about 4.14 GHz. This coupling electrospinning and carbonization approaches to design the fiber-oriented arrangement of magnetic matter provide a new route for impedance adjustment and boosting microwave absorption in high-performance carbon composite fibers.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"203 ","pages":"Article 109564"},"PeriodicalIF":8.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145974269","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

Simulating real FRP microstructures under longitudinal compression: Realistic fibre content, kinking–torsion metrics, and enhanced computational efficiency 纵向压缩下模拟真实FRP微结构：真实纤维含量，扭结-扭转度量，提高计算效率

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2026-04-01 Epub Date: 2025-12-17 DOI: 10.1016/j.compositesa.2025.109515

D. Bikos , R.S. Trask , P. Robinson , S. Pimenta

{"title":"Simulating real FRP microstructures under longitudinal compression: Realistic fibre content, kinking–torsion metrics, and enhanced computational efficiency","authors":"D. Bikos , R.S. Trask , P. Robinson , S. Pimenta","doi":"10.1016/j.compositesa.2025.109515","DOIUrl":"10.1016/j.compositesa.2025.109515","url":null,"abstract":"<div><div>Local imperfections in microstructures are a key factor influencing the compressive performance of fibre-reinforced polymer composites (FRPs); this can be investigated through micromechanical finite element (μFE) simulations of representative volume elements (RVEs) reconstructed from computed tomography of real FRP microstructures. This is the first paper that identifies and addresses three key open challenges in μFE simulations of real FRPs under longitudinal compression: firstly, we introduce a new method for generating continuum μFE models of RVEs with high fibre content (up to 55%) and without unrealistic resin-rich boundaries or fibre interpenetration. Secondly, we propose new microstructural metrics to characterise misalignment and twisting, novel deformation metrics to quantify kinking and torsion during compression, and we analyse their relationships. Thirdly, we validate our recently proposed, computationally efficient, shell-beam (SB) methodology at the microstructural level. The results highlight the importance of simulating FRP microstructures with a realistic fibre content and microstructural twist and demonstrate the very good predictive performance of SB models.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"203 ","pages":"Article 109515"},"PeriodicalIF":8.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145923095","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

Nanoscale toughening strategy for colloidal calcium silicate hydrate/crystalline calcium hydroxide interface in cementitious composites via molecular bridging in protrusion-induced gap 胶凝复合材料中水合硅酸钙胶体/结晶氢氧化钙界面的分子桥接增韧策略

IF 8.1 2区材料科学

Composites Part A: Applied Science and Manufacturing Pub Date : 2026-04-01 Epub Date: 2026-01-24 DOI: 10.1016/j.compositesa.2026.109597

Jingbo Zhuo , Ao Zhou , Zechuan Yu , Tiejun Liu

{"title":"Nanoscale toughening strategy for colloidal calcium silicate hydrate/crystalline calcium hydroxide interface in cementitious composites via molecular bridging in protrusion-induced gap","authors":"Jingbo Zhuo , Ao Zhou , Zechuan Yu , Tiejun Liu","doi":"10.1016/j.compositesa.2026.109597","DOIUrl":"10.1016/j.compositesa.2026.109597","url":null,"abstract":"<div><div>The interplay between amorphous colloid, crystalline phase, and their interface critically impacts the physics and mechanical behavior of multiphase composites. Colloidal calcium silicate hydrate (C-S-H) and crystalline calcium hydroxide (CH) are primary hydration products of cementitious composite, and the design of multiphase composites prefers C-S-H for mechanical properties. Yet, the significant performance gap between C-S-H and CH makes the C-S-H/CH interface a critical weak link affecting material behavior, and we propose a novel reinforcing strategy redistributing CH within the interface. An upscaling methodology is developed through remapping coarse-grained models to all-atom models, which overcomes barriers in realistic modeling of C-S-H/CH interface and identifying interactions between C-S-H and CH. This study reveals the impact of surface-layer configuration of CH, C-S-H roughness, and water on interfacial properties. Molecular dynamics simulations show that nanoscale protrusion of C-S-H/CH interface is primary contributor to poor toughness. Pore water bridges void and improves interfacial integrity, and embedding residual CH in interface region enhances toughness by over 525%, accompanied with shift of failure mode from interface failure to interlayer failureof CH. Such reinforcing mechanism fills protrusion-induced gap with ions or nanoparticles featuring specific binding, promoting atomic-level understanding of the interface between colloid and crystal, paving the way for in-situ interface-targeted regulation in advanced cementitious composites design.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"203 ","pages":"Article 109597"},"PeriodicalIF":8.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146073884","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