Composite Structures最新文献_第10页

Biomimetic design and protective performance of Ti/Al interpenetrating phase composites based on TPMS structures 基于TPMS结构的Ti/Al互穿相复合材料仿生设计及防护性能研究

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-07-01 Epub Date: 2026-06-15 DOI: 10.1016/j.compstruct.2026.120564

Chenglong Bi, Hongxing Qin, Duanqi Wang, Hongye Pan, Ziyan Hu, Qicheng Wang, Cheng Miao, Bin Liu, Yu Wang

{"title":"Biomimetic design and protective performance of Ti/Al interpenetrating phase composites based on TPMS structures","authors":"Chenglong Bi, Hongxing Qin, Duanqi Wang, Hongye Pan, Ziyan Hu, Qicheng Wang, Cheng Miao, Bin Liu, Yu Wang","doi":"10.1016/j.compstruct.2026.120564","DOIUrl":"10.1016/j.compstruct.2026.120564","url":null,"abstract":"<div><div>Protective metallic composites must sustain high loads while dissipating impact energy through stable deformation. Ti/Al interpenetrating phase composites were fabricated by laser powder bed fusion of TC4 titanium-alloy triply periodic minimal surface (TPMS) frameworks, followed by squeeze casting of an A356 aluminium alloy. Primitive, Diamond, and IWP frameworks with different titanium-alloy volume fractions were investigated to establish how framework morphology and hard-phase content regulate quasi-static compression, high-strain-rate impact response, energy absorption, and damage evolution. Increasing the titanium-alloy volume fraction enhanced the quasi-static compressive strength and volumetric energy absorption by increasing the load-bearing contribution of the hard framework; among the three architectures, the Primitive structure exhibited the most stable compressive response and the highest damage tolerance. In contrast, dynamic impact loading revealed a different design requirement: excessive titanium-alloy content increased stiffness but restricted deformation, leading to reduced impact energy absorption. A titanium-alloy volume fraction of 30% achieved a favourable balance between impact strength and energy dissipation. Finite-element simulations further showed that the infiltrated aluminium-alloy phase redistributed the load and alleviated local stress concentrations in the titanium-alloy framework. These results clarify the topology–volume-fraction–performance relationship in Ti/Al interpenetrating phase composites and provide design guidance for metallic protective materials.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"391 ","pages":"Article 120564"},"PeriodicalIF":7.8,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148526048","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

Inverse identification of viscoelastic cohesive parameters and relaxation–damage coupling in composite single-lap joints 复合材料单搭接粘弹性参数反演及松弛损伤耦合研究

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-07-01 Epub Date: 2026-06-21 DOI: 10.1016/j.compstruct.2026.120581

Jingwen Ren, Hanxiang Wang, Hang Wang, Longyu Huang, Feixue Ren, Yanxin Liu, Xin Zhang

{"title":"Inverse identification of viscoelastic cohesive parameters and relaxation–damage coupling in composite single-lap joints","authors":"Jingwen Ren, Hanxiang Wang, Hang Wang, Longyu Huang, Feixue Ren, Yanxin Liu, Xin Zhang","doi":"10.1016/j.compstruct.2026.120581","DOIUrl":"10.1016/j.compstruct.2026.120581","url":null,"abstract":"<div><div>The long-term response of adhesively bonded composite joints is governed by the coupled effects of bonded-layer rheology, adherend viscoelasticity, and interfacial damage. In many joint-level studies, however, these mechanisms are treated separately, which weakens both the physical consistency of parameter identification and the reliability of long-term response interpretation. This study develops a unified multiscale framework for composite single-lap joints under tensile–hold loading by integrating RVE-based homogenization of the orthotropic viscoelastic behavior of unidirectional and plain-woven composite adherends, a viscoelastic cohesive-zone formulation for the bonded layer, and a surrogate-assisted inverse-identification strategy combining a CNN-based forward model with particle swarm optimization. Tensile–hold relaxation tests were conducted under displacement control, and the force–time response during a 1200 s hold period was used as the inversion target. On the independent test subset, the proposed inverse framework achieved a mean response-level R<sup>2</sup> above 0.9998, while constitutive-consistency validation remained above 0.9999. The calibrated model further indicates that the hold-stage response is governed by the coupled evolution of interfacial displacement readjustment, local strain accumulation, traction attenuation, and progressive damage growth, rather than by viscoelastic stress decay alone. Acoustic emission measurements provide independent temporal corroboration of persistent irreversible internal activity during relaxation. The proposed framework offers an efficient route for identifying viscoelastic cohesive parameters and a physically grounded basis for interpreting relaxation–damage coupling in bonded composite joints under sustained loading.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"392 ","pages":"Article 120581"},"PeriodicalIF":7.8,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148528809","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 novel missing-rib auxetic structure with central node for enhanced mechanical performance 一种具有中心节点的新型缺肋辅助结构，提高了机械性能

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-07-01 Epub Date: 2026-06-14 DOI: 10.1016/j.compstruct.2026.120555

Tripurari, Sachin Kumar, Chandrakant Kumar Nirala

{"title":"A novel missing-rib auxetic structure with central node for enhanced mechanical performance","authors":"Tripurari, Sachin Kumar, Chandrakant Kumar Nirala","doi":"10.1016/j.compstruct.2026.120555","DOIUrl":"10.1016/j.compstruct.2026.120555","url":null,"abstract":"<div><div>Auxetic structures, characterized by their unconventional deformation behaviour and negative Poisson’s ratio, have gained significant interest due to their improved mechanical performance. Since the inception of auxeticity, design concepts for various mechanical metamaterials have evolved rapidly. In this study, a novel two-dimensional enhanced missing-rib (EMR) auxetic structure is proposed by mirroring the classical missing-rib (CMR) auxetic structure, and incorporating an auxiliary circular node at the centre of each unit cell. The mechanical properties and deformation behaviour of the proposed EMR auxetic structure are systematically examined under quasi-static compression loading using experimental testing and finite element analysis. The effects of array size, auxiliary circular node radius and ligament thickness on deformation patterns, effective Young’s modulus, effective shear modulus and negative Poisson’s ratio (NPR) are examined analytically and numerically for both structures. The results demonstrate that the EMR auxetic structure exhibits improved negative Poisson’s ratio, stiffness and stress distribution due to enhanced rotational deformation mechanisms. Polylactic acid is used as the base material, and specimens are fabricated using additive manufacturing technology, fused deposition modelling for testing. The experimental, theoretical and numerical results are found in good agreement. Overall, the proposed EMR auxetic structure outperforms CMR auxetic structure in all respect i.e. negative Poisson’s ratio, stiffness and specific energy absorption capacity. However, the validations of the proposed model are limited toapplied boundary conditions, material and laboratory-scale auxetic unit cell and array specimens. These findings provide valuable insights into the mechanical behaviour of missing-rib auxetic structures as a basis for exploring its potential in novel applications.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"392 ","pages":"Article 120555"},"PeriodicalIF":7.8,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148528800","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 structural integrity based parametric design and optimization method for type IV hydrogen filament winding composite pressure vessel 基于结构完整性的IV型氢丝缠绕复合材料压力容器参数化设计与优化方法

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-07-01 Epub Date: 2026-06-07 DOI: 10.1016/j.compstruct.2026.120534

Ruiqi Li, Haixiao Hu, Jinchun Zhu, Dongfeng Cao, Kaidong Zheng, Yu Zhang, Hao Li, Hongda Chen, Shuxin Li

{"title":"A structural integrity based parametric design and optimization method for type IV hydrogen filament winding composite pressure vessel","authors":"Ruiqi Li, Haixiao Hu, Jinchun Zhu, Dongfeng Cao, Kaidong Zheng, Yu Zhang, Hao Li, Hongda Chen, Shuxin Li","doi":"10.1016/j.compstruct.2026.120534","DOIUrl":"10.1016/j.compstruct.2026.120534","url":null,"abstract":"<div><div>Designing Type IV hydrogen storage composite pressure vessels (CPVs) to meet both safety and lightweight requirements remains a challenge. This study clarifies the limitations of the current widely used parametric design method for composite pressure vessels and proposes a structural integrity-based parametric design method. In the proposed method, the various helical composite layers in the advanced variable radii design are first determined based on the structural features of the dome region, followed by the determination of the hoop composite layers for the cylindrical region. The parametric design method is fast and cost-efficient, providing essential input data for finite element analysis and structural optimization. Furthermore, the Box–Behnken design (BBD) combined with a hybrid Whale Optimization Algorithm, Backpropagation Neural Network, and Genetic Algorithm (WOA-BPNN-GA) optimization procedure is proposed to optimize the structural design, achieving up to 30% reduction in composite structure mass. The designed and optimized filament winding composite pressure vessel was manufactured and tested. Good agreement is observed between the design and experimental results, with errors of 3.33% for burst pressure and 3.63% for composite structural mass. This agreement validates the proposed structural integrity-based parametric design method and optimization procedure.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"392 ","pages":"Article 120534"},"PeriodicalIF":7.8,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148528811","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

Maximizing targeted natural frequencies of composite cylindrical panel through optimal positioning of point elastic support using a multi-objective genetic algorithm 采用多目标遗传算法对点弹性支承进行优化定位，使复合材料圆柱板的目标固有频率最大化

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-07-01 Epub Date: 2026-06-25 DOI: 10.1016/j.compstruct.2026.120587

Cong Li

{"title":"Maximizing targeted natural frequencies of composite cylindrical panel through optimal positioning of point elastic support using a multi-objective genetic algorithm","authors":"Cong Li","doi":"10.1016/j.compstruct.2026.120587","DOIUrl":"10.1016/j.compstruct.2026.120587","url":null,"abstract":"<div><div>In this research, a method is applied to optimize the vibrational behavior of graphene platelet (GPL)-reinforced composite cylindrical panels, considering functionally graded distributions of the reinforcements. The primary objective is to strategically place discrete point elastic foundations to improve structural efficiency under varying operational scenarios. The composite’s effective elastic properties are derived using the Halpin-Tsai homogenization technique. The structural deformation is assessed using first-order shear deformation theory (FSDT). Solutions are obtained via a 2D Ritz approach that employs Chebyshev polynomials, serving as the basis for defining the optimization criteria in a multi-objective genetic framework. This optimization process aims to determine the optimal placement of discrete elastic supports to achieve desired resonance frequencies. Any number of natural frequencies, associated with any mode numbers, can be selected for optimization within this analysis. The Non-dominated Sorting Genetic Algorithm II (NSGA-II) is employed to generate Pareto-optimal solutions, effectively illustrating the balance between conflicting goals. The accuracy of the proposed method is rigorously verified through comparisons with existing benchmark data in the literature, demonstrating an exceptional agreement with a maximum discrepancy of less than 2.5 % across various structural configurations, thereby confirming its reliability and practical effectiveness. The optimization approach is further applied to different panel configurations, considering various FG-GPL compositions and boundary conditions. This method not only improves the structural performance of cylindrical panels but also contributes to the accurate development and fabrication of components for civil, mechanical, and aerospace applications.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"392 ","pages":"Article 120587"},"PeriodicalIF":7.8,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148528812","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

Bioinspired fractal design and additive manufacturing of radial gradient porous bone scaffold: Towards tunable porosity, mechanical properties and permeability 径向梯度多孔骨支架的生物启发分形设计和增材制造：朝向可调孔隙度、力学性能和渗透性

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-07-01 Epub Date: 2026-06-21 DOI: 10.1016/j.compstruct.2026.120588

Jiye Jia, Junwei Shen, Feng Yang, Yingang Xiao, Cijun Shuai, Shijie Chen, Zhaochen Tong, Pei Feng

{"title":"Bioinspired fractal design and additive manufacturing of radial gradient porous bone scaffold: Towards tunable porosity, mechanical properties and permeability","authors":"Jiye Jia, Junwei Shen, Feng Yang, Yingang Xiao, Cijun Shuai, Shijie Chen, Zhaochen Tong, Pei Feng","doi":"10.1016/j.compstruct.2026.120588","DOIUrl":"10.1016/j.compstruct.2026.120588","url":null,"abstract":"<div><div>The single and homogeneous pore structure of bone scaffold often struggle to simultaneously meet the dual requirements of natural bone for porosity and mechanical properties, thereby limiting the efficacy of bone regeneration. Herein, inspired by the honeycomb and branching structures found in nature, the poly (l-lactide) scaffold with radial gradient porous structure was designed using biomimetic and fractal design methodologies, and then fabricated by fused deposition modeling technology. By adjusting the wall thickness of honeycomb structure and iteration number of fractal structure, the characteristic of natural bone porosity, which gradually decreased from the center to the periphery, was simulated. Mechanical testing results indicated that the compressive properties of the scaffold improved with increasing iteration order, which was due to the increased contact area between the fractal-structure layer and the honeycomb-structure layer. Permeability experiments and simulation analyses demonstrated that from the first-order to fourth-order scaffolds, both porosity and overall permeability exhibited gradual decreasing trend, while the overall permeability of all scaffolds remained higher than that of natural bone. Considering both compression and permeability, the third-order scaffold performed best. Overall, this work aims to present a strategy for designing scaffold with tailored pore distributions, mechanical properties and permeability to meet diverse requirements.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"392 ","pages":"Article 120588"},"PeriodicalIF":7.8,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148528821","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

Explicit strength prediction of 3D scarf-repaired composite structures using dimensional analysis and symbolic regression 基于量纲分析和符号回归的三维围巾修复复合材料结构显式强度预测

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-07-01 Epub Date: 2026-06-19 DOI: 10.1016/j.compstruct.2026.120565

Zhenyu Wang, Han Yan, Yinghua Liu, Xuefeng Yao

{"title":"Explicit strength prediction of 3D scarf-repaired composite structures using dimensional analysis and symbolic regression","authors":"Zhenyu Wang, Han Yan, Yinghua Liu, Xuefeng Yao","doi":"10.1016/j.compstruct.2026.120565","DOIUrl":"10.1016/j.compstruct.2026.120565","url":null,"abstract":"<div><div>Predicting the strength of 3D scarf-repaired composite structures remains challenging because repair geometry, adhesive properties, and laminate lay-up jointly produce strongly nonlinear strength responses. This study develops an explicit strength-prediction framework that integrates dimensional analysis and symbolic regression. Within this framework, classical laminate theory and dimensional consistency are used to transform the original high-dimensional design problem into a compact set of mechanically meaningful dimensionless variables. A finite-element progressive damage database is constructed over the resulting design domain, and symbolic regression is applied to derive a compact analytical expression for the strength recovery ratio. The resulting strength-prediction formula provides accurate predictions within the sampled parameter ranges and retains an explicit form suitable for engineering design, parameter influence analysis, and rapid repeated evaluation. Additional comparisons with a DA-only power-law model and ANN baseline models show that the proposed SR model attains prediction accuracy close to that of ANN models while preserving a closed-form and interpretable expression. The proposed framework is developed for monotonic uniaxial tensile loading under the modeling assumptions and parameter ranges considered in this study.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"392 ","pages":"Article 120565"},"PeriodicalIF":7.8,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148557780","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

Strengthening opening honeycomb metamaterials via perforation patterns inspired by glass sponge 通过启发于玻璃海绵的穿孔图案加强开口蜂窝超材料

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-07-01 Epub Date: 2026-06-15 DOI: 10.1016/j.compstruct.2026.120566

Bo Jin, Ruiyi Jiang, Hao Feng, Ming Li, Hualin Fan

{"title":"Strengthening opening honeycomb metamaterials via perforation patterns inspired by glass sponge","authors":"Bo Jin, Ruiyi Jiang, Hao Feng, Ming Li, Hualin Fan","doi":"10.1016/j.compstruct.2026.120566","DOIUrl":"10.1016/j.compstruct.2026.120566","url":null,"abstract":"<div><div>Honeycomb metamaterials produced by additive manufacturing (AM) are widely applied in the engineering fields due to their lightweight and multifunctional capabilities. Numerous studies have primarily concentrated on optimizing honeycomb sections, while the design freedom related to the wall integrity remains largely unexplored, due to the counterintuitive notion that perforations can enhance mechanical performance. In this study, a perforation pattern inspired by glass sponges was incorporated into the opening design of flanges in honeycomb metamaterials. Five comparable opening honeycomb metamaterials (OHMs) made of stainless steel 316 L were printed by the laser powder bed fusion technique. The super folding element theory to predict the mean crushing force (MCF) was developed to account for geometric effects induced by the perforations, achieving good agreement with numerical simulations and accurately capturing the variations during mode transitions. Quasi-static out-of-plane compression tests were employed to validate and analyze the mechanical enhancements by the perforation. In contrast to square honeycombs with relative density of 0.1, the OHMs of the same mass exhibit up to a 30.8% increase in MCF and a 33.4% improvement in specific energy absorption (SEA) to 31.0 J/g, with the MCF reaching 92% of the full-plastic stress. Ultimately, this work aims to introduce an innovative design concept that leverages the design space of perforations, enabling research on the support-free OHMs to go beyond conventional honeycombs and promote new advancements.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"392 ","pages":"Article 120566"},"PeriodicalIF":7.8,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148557781","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

Damage modes and mechanisms of GFRP-concrete-steel double-skin tubular columns under near-field explosions 近场爆炸作用下gfrp -混凝土-钢双皮管柱的损伤模式及机理

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-07-01 Epub Date: 2026-06-27 DOI: 10.1016/j.compstruct.2026.120585

Yunhao Geng, Gen Li, Xiaowei Feng, Jun Yu

{"title":"Damage modes and mechanisms of GFRP-concrete-steel double-skin tubular columns under near-field explosions","authors":"Yunhao Geng, Gen Li, Xiaowei Feng, Jun Yu","doi":"10.1016/j.compstruct.2026.120585","DOIUrl":"10.1016/j.compstruct.2026.120585","url":null,"abstract":"<div><div>GFRP-concrete-steel double-skin tubular columns (GFRP-DSTCs) are novel hybrid columns which integrate high ductility with excellent corrosion resistance and have potential applications in infrastructure. In this paper, experimental and numerical investigations were conducted on damage modes of GFRP-DSTCs under near-field blast loading at scaled distance ranging from 0.37 m/kg<sup>1/3</sup> to 0.24 m/kg<sup>1/3</sup>. The test results reveal that the damage of GFRP-DSTCs was highly localized under near-field explosions, and three failure modes were observed depending on the scaled distance. High-fidelity numerical models were established to illustrate the damage mechanisms. The failure of GFRP-DSTCs is attributed to the combined effects of stress waves with impulsive loading generated by shock waves and detonation products. Moreover, the GFRP tube primarily enhances the blast resistance of the column by providing confinement to concrete. Finally, parametric analyses were carried out to identify the key parameters influencing the near-field blast resistance of the column and provide guidance for the optimal design of GFRP-DSTCs against blast load. It is found that increasing the nominal steel ratios or the GFRP tube thicknesses reduces the localized deformation of the steel tubes, whereas reducing the void ratio from 0.6 to 0.4 results in the transitions from breaching to cratering failure of concrete.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"392 ","pages":"Article 120585"},"PeriodicalIF":7.8,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148557785","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

Influence of mechanical pre-strain under varying temperatures on flexural performance and failure of 3D-printed carbon fiber sandwich structures 不同温度下机械预应变对3d打印碳纤维夹层结构弯曲性能及破坏的影响

IF 7.8 2区材料科学

Composite Structures Pub Date : 2026-07-01 Epub Date: 2026-06-15 DOI: 10.1016/j.compstruct.2026.120563

Sanjay Kumar, Hak-Sung Kim

{"title":"Influence of mechanical pre-strain under varying temperatures on flexural performance and failure of 3D-printed carbon fiber sandwich structures","authors":"Sanjay Kumar, Hak-Sung Kim","doi":"10.1016/j.compstruct.2026.120563","DOIUrl":"10.1016/j.compstruct.2026.120563","url":null,"abstract":"<div><div>3D-printed sandwich composites offer lightweight solutions for aerospace, automotive, and defense applications; however, their flexural response under combined pre-strain (PS) and temperature remains insufficiently understood. This study systematically investigates the effects of PS (50, 70, and 75% of ultimate deformation) and temperature (room, high ∼ 50 °C, and low ∼ − 20 °C) on flexural strength (FS), energy absorption (EA), failure mechanisms, and residual properties of a 3D-printed continuous carbon-fiber-reinforced thermoplastic (CFRTP) corrugated-core sandwich structure. PS-free specimens exhibited a three-stage failure consisting of interfacial cracking, core cracking, and skin buckling. Lower PS (50%) caused minor reductions in FS and EA, whereas higher PS (70–75%) accelerated crack initiation, promoted dual-sided core crushing and skin instability, and reduced FS from 29.16 MPa to 25.5 MPa and EA from 30.4 J to 21 J. Under coupled PS and temperature, elevated temperature significantly amplified PS-induced degradation and weakened adhesive shear resistance, resulting in early interfacial cracking and unstable fracture. In contrast, low temperature increases stiffness, shifted failure toward skin cracking with distributed core damage, and substantially preserved FS and EA (residual FS ≈89–100% and residual EA ≈62–63%). These results demonstrate that low-temperature effectively mitigating PS degradation and enhance reliability for demanding structural applications.</div></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":"391 ","pages":"Article 120563"},"PeriodicalIF":7.8,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148525965","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