Composites Part B: Engineering最新文献

{"title":"Biomimetic 3D printed Herringbone-Bouligand SHCC for ultra-high impact resistance","authors":"Guoqiang Du,&nbsp;Xiaowei Deng,&nbsp;Ye Qian","doi":"10.1016/j.compositesb.2025.112993","DOIUrl":"10.1016/j.compositesb.2025.112993","url":null,"abstract":"<div><div>Nature can create tough and lightweight materials under specific conditions. Learning from nature and developing novel biomimetic structures within synthetic materials is crucial for advancing impact-resistant materials. In this work, inspired by the dactyl club of mantis shrimp, we integrated Herringbone and Bouligand structures to produce 3D printed Strain-Hardening Cementitious Composites (SHCC) with ultra-high impact resistance. Through 3D concrete printing, SHCC filaments and fibers were arranged coaxially and form a Herringbone-Bouligand structure. The results indicated that the Herringbone-Bouligand structure significantly enhanced the impact resistance of SHCC. The Herringbone-Bouligand structure exhibited the highest specific absorption energy of 843.3 ± 45.19 mJ/cm³ and a specific impact force of 23.8 ± 1.17 N/cm³. Its specific absorption energy was 290.8 times greater than that of plain concrete (2.9 ± 0.08 mJ/cm³), while its specific impact force was 7.0 times higher than that of plain concrete (3.4 ± 0.05 N/cm³). The toughening mechanism was attributed to the sinusoidal arrangement of the SHCC filaments, which absorbed the impact force through spring deformation, and the Bouligand arrangement, which promoted crack twisting. This combination allowed the structure to better absorb and release energy. The Herringbone-Bouligand structure offers a promising solution for protective applications in harsh environments and provides valuable insights for developing impact-resistant, lightweight cementitious materials through biomimetic strategies.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"308 ","pages":"Article 112993"},"PeriodicalIF":14.2,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145060676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CoF2 nanodots embedded N-doped carbon polyhedrons as a multifunctional interlayer for dendrite-free and stable lithium-sulfur batteries","authors":"Ziheng Zhang,&nbsp;Daiqian Chen,&nbsp;Hesheng Yu,&nbsp;Xinsheng Li,&nbsp;Yue Wang,&nbsp;Jinri Huang,&nbsp;Yu Wu,&nbsp;Yuanfu Chen","doi":"10.1016/j.compositesb.2025.113002","DOIUrl":"10.1016/j.compositesb.2025.113002","url":null,"abstract":"<div><div>The shuttle effect of lithium polysulfides (LiPSs) and the uncontrolled growth of lithium dendrites remain formidable barriers to the large-scale commercialization of lithium-sulfur (Li–S) batteries. In order to simultaneously address both issues, herein, for the first time, we present MOF-derived CoF₂ nanodots embedded nitrogen-doped carbon polyhedrons (CoF₂@NCP) as a multifunctional separator interlayer. The conductive NCP and <em>in-situ</em> grown CNTs provide efficient electron transfer network. Most importantly, the homogeneously distributed polar and lithiophilic CoF₂ nanodots can not only strongly chemisorb and effectively catalytically convert LiPSs to suppress shuttle effect, but also uniformly regulate the Li-ion flux to realize smooth stripping/plating, thus inhibiting dendrite growth. Benefiting from the merits, the Li||Li symmetric cells with CoF₂@NCP sustain stable cycling for 1000 h at 1 mA cm⁻² and remain stable at 4 mA cm⁻²; the Li–S full cells with CoF₂@NCP deliver an outstanding initial capacity of 1514.8 mA h g⁻¹ at 0.2 C, retain 935.2 mA h g⁻¹ after 150 cycles, and exhibit a high capacity of 753.9 mA h g⁻¹ at a high rate of 4 C. <em>In-situ</em> Raman spectroscopy and Li₂S₆ adsorption tests confirm effective LiPSs immobilization and accelerated redox kinetics. This work offers a rational strategy for designing multifunctional interlayers for dendrite-free and stable Li–S batteries.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"308 ","pages":"Article 113002"},"PeriodicalIF":14.2,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145010770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"3D-printed boron nitride nanotube-reinforced polymer-derived ceramics with reduced porosity and enhanced strength","authors":"A. Sohrabi-Kashani ,&nbsp;H. Yazdani Sarvestani ,&nbsp;T. Lacelle ,&nbsp;Y. Martinez-Rubi ,&nbsp;S. Zou ,&nbsp;A. Robitaille ,&nbsp;H. Lavoie ,&nbsp;M.B. Jakubinek ,&nbsp;B. Ashrafi","doi":"10.1016/j.compositesb.2025.112991","DOIUrl":"10.1016/j.compositesb.2025.112991","url":null,"abstract":"<div><div>This study introduces a novel approach for fabricating ceramic structures using a silicon oxycarbide (SiOC) preceramic resin enhanced with boron nitride nanotubes (BNNTs) through digital light processing (DLP). These ceramics feature intricate shapes and high-resolution triply periodic minimal surface (TPMS) architectures with low relative density structures but dense (low-porosity) ceramic features. Incorporating BNNTs at low concentrations (0.2, 0.4, and 0.8 wt%) into a commercially available SiOC precursor, which was then formulated for DLP printing, resulted in a significant reduction in porosity and improved mechanical performance in the polymer-derived SiOC. This combined effect preserved original designs with higher accuracy and significantly enhanced energy absorption and compressive strength of the 3D-printed ceramics compared to baseline SiOC lattices, by factors of 4.4 and 6 times, respectively. Characterization revealed modest changes in storage and loss moduli with BNNT addition, while the BNNT-modified formulation exhibited excellent printability, and ceramic density measurements confirmed a slight increase with BNNT incorporation. This innovative approach, paired with the versatility of additive digital manufacturing, enables the creation of customizable, bio-inspired ceramic structures with tunable properties for aerospace, energy, and biomedical applications.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"308 ","pages":"Article 112991"},"PeriodicalIF":14.2,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145019541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Asymmetric hierarchically structured composite aerogels with enhanced dual-spectral selectivity for efficient radiative cooling","authors":"Xiaohai Bu ,&nbsp;Liyi Chai ,&nbsp;Yanmei Liu ,&nbsp;Bing Feng ,&nbsp;Tao Lu ,&nbsp;Mingxin Feng ,&nbsp;Yuming Zhou","doi":"10.1016/j.compositesb.2025.112988","DOIUrl":"10.1016/j.compositesb.2025.112988","url":null,"abstract":"<div><div>Passive radiative cooling (PRC) has emerged as a promising zero-energy cooling technology for achieving global carbon neutrality goals. However, conventional PRC materials face persistent challenges including seasonal overcooling effects and limited cooling efficiency due to unavoidable solar absorption and thermal conduction losses. In this work, we develop an asymmetric PLA/SiO₂ composite aerogel with hierarchical porous structure through a facile water-induced phase separation strategy, where gravity-driven SiO₂ particle sedimentation creates enhanced dual-spectral selectivity on the aerogel's bottom surface. The composite aerogel integrates superior radiative cooling and thermal insulation functions in a single design, simultaneously achieving ∼97.1 % solar reflectance, ∼95.6 % atmospheric window emissivity, and ultralow thermal conductivity (0.032 W m⁻¹ K⁻¹). Outdoor measurements confirm effective cooling performance with temperature drops of ∼8.83 °C under direct sunlight and ∼5.66 °C in cloudy conditions. Moreover, the aerogel exhibits retained self-cleaning functionality and optical stability after various environmental durability tests, adapting to harsh real-world applications. Energy consumption simulations demonstrate that the aerogels have great potential of year-around energy saving and CO₂ reduction in China for energy-efficient building models integrated with aerogels on roof and walls. This study pioneers the creation of biodegradable PRC materials that combine building thermal management with environmental sustainability, thereby propelling the advancement of next-generation energy-efficient buildings.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"308 ","pages":"Article 112988"},"PeriodicalIF":14.2,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145010689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multifunctional polydimethylsiloxane composites with interpenetrating conductive segregated network for exceptional electromagnetic interference shielding","authors":"Weirui Zhang ,&nbsp;Zhongjie He ,&nbsp;Sijie Yu ,&nbsp;Yangyang Xin ,&nbsp;Fangfang Su ,&nbsp;Dongdong Yao ,&nbsp;Yudeng Wang ,&nbsp;Yaping Zheng","doi":"10.1016/j.compositesb.2025.112989","DOIUrl":"10.1016/j.compositesb.2025.112989","url":null,"abstract":"<div><div>Polydimethylsiloxane (PDMS) segregated composites incorporating MXene as a conductive filler were demonstrated significant advancements in electromagnetic interference (EMI) shielding applications. However, the EMI shielding effectiveness (EMI SE) at low conductive filler contents remains a challenge that requires further optimization. In this work, PDMS@MXene microspheres were prepared via electrostatic interactions and then integrated with silver nanowires (AgNWs) to construct a PDMS@MXene/AgNWs interpenetrating conductive network. Subsequently, the PDMS@MXene/AgNWs (PMA) composites were fabricated by infiltrating the PDMS matrix into the interpenetrating network. Within the PMA conductive composites, MXene nanosheets formed a continuous conductive network, while AgNWs served as bridging connectors to enhance charge transfer efficiency. Notably, the PMA composite at low conductive filler loading of 7.12 wt% achieved an electrical conductivity of 118.60 S m⁻¹ and an impressive EMI shielding efficiency/thickness (EMI SE/d) of 39.33 dB mm⁻¹. Furthermore, the PMA composite exhibited exceptional EMI shielding stability under various harsh environments, including extreme temperatures and acidic/basic chemical environments. Additionally, the photothermal conversion performance of the PMA composite and the capacitive sensing performance of sensors based on PMA composites highlighted their potential applications in body temperature regulation and information transmission. This work provides a promising approach for designing PDMS-based multifunctional EMI shielding composites, which hold great promise for wearable electronic devices.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"308 ","pages":"Article 112989"},"PeriodicalIF":14.2,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145060679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Silane-nanoSiO2 composite surface modification of steel fibres: A multiscale experimental study of fibre-UHPC interfaces","authors":"Jiefu Tian ,&nbsp;Yaqi Li ,&nbsp;Guojun Yang ,&nbsp;Meini Su ,&nbsp;Zhenjun Yang","doi":"10.1016/j.compositesb.2025.112999","DOIUrl":"10.1016/j.compositesb.2025.112999","url":null,"abstract":"<div><div>An innovative silane-nanoSiO₂-based surface modification technique for steel fibres was developed recently and proved promising to significantly enhance the strength of ultra-high performance fibre reinforced concrete (UHPFRC). This study aims to further elucidate the fibre-UHPC interfacial modification mechanisms through extensive fibre pullout tests and advanced nano/micro characterization techniques. The FTIR and EDS tests revealed higher Fe–O–Si and Si–O–Si covalent bonds in the composite coating, supporting a proposed chemical modification mechanism. The SEM and WLI tests showed uniform dispersion of nanoSiO₂ particles and a 16.3 % increase in surface roughness compared with brass coating. The double-sided pullout tests on 27 specimens with nine parallel embedded fibres demonstrated that bond strength and pullout energy of composite-coated fibres increased with curing age, reaching 14.7 MPa and 0.12J at 28 days, which were 345 % and 222 % higher than brass-coated fibres, respectively. The μXCT scans revealed that the composite coating reduced the thickness, porosity, and weighted average pore diameter of interfacial transition zone (ITZ) by 37.5 %, 43.3 %, and 47.6 %, respectively, compared with brass coating. Fibres with composite coating were fully covered by the UHPC matrix, with bumpy tunnels surrounded by dispersed cracks, unlike smooth tunnels in silane or brass-coated fibres. The XRD and TGA tests indicated that the composite coating accelerated the hydration process and led to more C–S–H hydrates and thus much denser ITZ and much stronger interfacial bond than the silane or brass coating alone.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"308 ","pages":"Article 112999"},"PeriodicalIF":14.2,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative life cycle energy assessment of lightweight multi-material metal-fiber composite hybrid body-in-white designs","authors":"Amit Makarand Deshpande ,&nbsp;Urjit Lad ,&nbsp;Sai Aditya Pradeep ,&nbsp;Ningxiner Zhao ,&nbsp;Leon M. Headings ,&nbsp;Marcelo J. Dapino ,&nbsp;Ryan Hahnlen ,&nbsp;Gang Li ,&nbsp;Michael Carbajales-Dale ,&nbsp;Kevin Simmons ,&nbsp;Srikanth Pilla","doi":"10.1016/j.compositesb.2025.113000","DOIUrl":"10.1016/j.compositesb.2025.113000","url":null,"abstract":"<div><div>Lightweighting is crucial for enhancing vehicle efficiency and reducing tailpipe emissions. Fiber-reinforced plastic (FRP) composites for the Body-in-White (BIW) are a major research focus aimed at achieving lightweighting. FRP composite manufacturing processes, such as vacuum infusion or automated fiber placement, cannot meet the automotive industry's rates, cycle times and large production volumes. From a cost standpoint, as component size and scale of manufacturing increase, material cost becomes the dominant factor in production, inhibiting the use of expensive composite materials. Thus, multi-material structural designs have taken center stage, where lightweight materials and high-rate composite manufacturing processes are strategically used in conjunction with traditional metallic designs.</div><div>A highly integrated multi-material, FRP-intensive BIW design was developed using unique multi-material metal-fiber transition joints that enable spot welding of composite parts. This allows a multi-material BIW to be manufactured with minimal change to the vehicle manufacturer's assembly and joining infrastructure, presenting a cost-effective solution to integrate composites. From a sustainability standpoint, the life cycle impact of these multi-material designs and composite manufacturing methodologies must be investigated and compared with contemporary sheet-metal designs. A comprehensive comparative life cycle energy assessment has been performed on the proposed multi-material designs manufactured using fast-cycle composite manufacturing processes. Determining the cumulative energy demand over the entire life cycle of the multi-material BIW provides valuable insights into the material composition of the multi-material BIW. It also helps establish a trade-off between the use of energy-intensive composite materials and the energy savings achieved during the use stage due to lightweighting.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"309 ","pages":"Article 113000"},"PeriodicalIF":14.2,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Upcycling decommissioned wind turbine blades into high-performance engineering wood composites","authors":"Hualei Zhang,&nbsp;Dekang Zuo,&nbsp;Mengfan Hu,&nbsp;Tiantian Zhang,&nbsp;Hongguang Liu,&nbsp;Li Li,&nbsp;Bin Luo","doi":"10.1016/j.compositesb.2025.112962","DOIUrl":"10.1016/j.compositesb.2025.112962","url":null,"abstract":"<div><div>The disposal of end-of-life Glass Fiber Reinforced Polymer (GFRP) from wind turbine blades poses a critical environmental challenge, demanding sustainable upcycling solutions and practical utilization. However, unlocking its reinforcement potential is fundamentally crippled by the chemically inert, low-adhesion epoxy surface, a barrier that has precluded its effective use in high-performance composites. Herein, we introduce a scalable and cost-effective strategy to upcycle this problematic waste into high-performance, multifunctional engineering wood composites (EWC) by overcoming this critical interfacial barrier. A custom-designed mechanical modification process was developed to activate the GFRP surface, creating a rough, porous, and highly wettable interface by selectively removing the inert epoxy resin layer. The optimized EWC-40 composite, incorporating 40 % modified GFRP, demonstrated a remarkable synergy of properties, including a flexural strength (90.47 MPa) and internal bonding strength (1.56 MPa) that vastly surpass those of conventional wood panels. Crucially, the composite also exhibited superior fire safety, with a 26.5 % reduction in the peak heat release rate (pHRR) and a 45 % reduction in total smoke production (TSP). Furthermore, it demonstrated outstanding durability, not only retaining excellent mechanical integrity after aggressive accelerated aging cycles but also achieving the highest durability rating (Class I) in a decay resistance assay with 83.2 % less mass loss than the control. This study establishes a cost-effective and industrially viable pathway for upcycling GFRP waste into superior structural materials and, more broadly, demonstrates that targeted mechanical activation is a powerful platform technology for valorizing a wide range of challenging thermoset composite wastes.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"308 ","pages":"Article 112962"},"PeriodicalIF":14.2,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144997225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interlayer modulation in layered δ-MnO2 for high-performance Ca-ion storage in aqueous batteries","authors":"Shihao Li,&nbsp;Chuanzheng Zhu,&nbsp;Mengdan Tian,&nbsp;Ruihang Wen,&nbsp;Qi Jiang,&nbsp;Wenhui Li,&nbsp;Renshuo Ding,&nbsp;Kun Luo","doi":"10.1016/j.compositesb.2025.112980","DOIUrl":"10.1016/j.compositesb.2025.112980","url":null,"abstract":"<div><div>Aqueous Ca-ion batteries (ACIBs) are seen as a member of the emerging energy storage technologies owing to their cost-effectiveness and eco-friendliness. Nevertheless, the application of traditional cathode materials for ACIBs is limited by inadequate specific capacity and low cycle durability. Among multiple cathodes, manganese oxides with a high capacity in theory are proper to be excellent prospects for ACIBs. In this work, the interlayer spacing in layered δ-MnO₂ is effectively modulated via the pre-intercalation of metal ions (Zn²⁺ or Ca²⁺) into the layered lattice. Interestingly, the pre-insertion of Zn²⁺ into the layered δ-MnO₂ induces an unusual contraction of interlayer spacing, while the pre-insertion of Ca²⁺ shows an expansion of interlayer spacing. The different variation of layered δ-MnO₂ structure via various metal ions pre-insertion is considered to be a combined result of ionic size and electrostatic interactions. Electrochemical tests exhibit that the Zn–MnO₂ with the contracted interlayer spacing offers an increased reversible capacity of 138.5 mAh g⁻¹ at 0.5 A g⁻¹, which should be credited to the decreased Ca adsorption energy (E_ads) in Zn–MnO₂ according to the Density Functional Theory (DFT) calculations. In addition, Zn–MnO₂ cathode demonstrates a prolonged cyclic life of 1000 cycles at 2.0 A g⁻¹ with 85.4 % capacity retention, due to the relatively small volume variation during Ca²⁺ insertion/extraction in the electrochemical reactions. The stable Ca-ion full battery is constructed using Zn–MnO₂ cathode and PPTCDI (poly 3,4,9,10-perylentetracarboxylic diimide) anode, demonstrating a high capacity of 93.2 mAh g⁻¹ at 2.0 A g⁻¹ and outstanding cycling stability. This work introduces the effective interlayer modulation of the layered δ-MnO₂ via foreign metallic ion pre-intercalation to fulfill enhanced Ca²⁺ ion storage.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"308 ","pages":"Article 112980"},"PeriodicalIF":14.2,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144997231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An improved non-associative plastic flow rule for CF/PEEK thermoplastic composites under low-velocity impact","authors":"Z.B. Guo,&nbsp;P.F. Liu","doi":"10.1016/j.compositesb.2025.112969","DOIUrl":"10.1016/j.compositesb.2025.112969","url":null,"abstract":"<div><div>Carbon fiber-reinforced thermoplastic composites such as CF/PEEK are increasingly used in aerospace structures due to their higher strength and damage tolerance compared to thermoset composites. Existing plasticity models for thermoplastic composites often neglect two critical factors: the hydrostatic pressure effect in the yield function and the dilatant effect in the plastic potential function, leading to inaccurate predictions of impact mechanical behaviors. This study proposes an improved non-associative plastic flow rule that addresses these limitations in the Sun-Chen model for thermoplastic composites under low-velocity impact (LVI). Theoretically, we derive: 1. a hardening law linking the equivalent stress-plastic strain to the uniaxial responses, showing dependence on the off-axis angle, shear stress, and hydrostatic coefficient, independent of the potential function; 2. a transverse plastic Poisson's ratio-based method to calibrate the hydrostatic coefficient in the potential function via the transverse compressive experimental data of thermoplastic composites. The hydrostatic coefficient and shear stress coefficient in the yield function are identified by using the off-axis tensile experimental data of thermoplastic composites. Combining Puck failure criteria and cohesive zone model, the developed model is implemented in ABAQUS-VUMAT to analyze the 150 mm × 100 mm × 2 mm CF/PEEK composite laminates with two stacking sequences under 10J/20J impact energy. Key findings demonstrate that numerical models ignoring hydrostatic pressure overestimate central displacement and plastic dissipation, while underestimating damage dissipation. The incorporation of hydrostatic pressure significantly improves agreement with experimental load-displacement curves and enables precise quantification of deformation mechanisms.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"308 ","pages":"Article 112969"},"PeriodicalIF":14.2,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}