Composite Structures最新文献

Analysis of magneto-mechanical coupling model and dynamic deformation characteristics of flexible magnetostrictive ribbon films considering fiber structure 考虑纤维结构的柔性磁致伸缩带膜磁-力耦合模型及动态变形特性分析

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-29 DOI: 10.1016/j.compstruct.2026.120110

Luyao Zhao , Huifang Liu , Jiaqi Wang , Yifei Gao , Chunye Hou , Cheng Li

To address the growing demand for magnetostrictive micro-nano structural materials that exhibit both high performance and flexibility, it is essential to analyze and design the dynamic driving characteristics of magnetostrictive fiber ribbon film, which is crucial for further enhancing its working capability. This paper innovatively presents a state-space model to characterize the dynamic magnetostrictive deformation of fiber ribbon films with various structural parameters under applied magnetic fields. For the first time, fiber structure is explicitly incorporated into the description of its electro-magnetic-mechanical dynamic behavior. Phase trajectory analysis reveals the stability boundary during the driving process, and time-domain characteristics under different magnetic fields are simulated. The results indicate that magnetostrictive performance improves with increasing driving current, leading to bifurcation behavior at the critical current of 0.9A. At this time, the film exhibits bistable characteristics, repeatedly transitioning between two stable equilibrium positions. This motion enables the accumulation and release of energy through potential well crossing, thus achieving large magnetostrictive deformation output. Finally, the output characteristics under varying frequencies and amplitudes of driving current are evaluated, with a maximum deformation of 208 μm under combined 3.1A bias and alternating current excitation. These findings provide a theoretical basis for designing high-output flexible magnetoelectric transducers.

为了满足人们对兼具高性能和柔韧性的磁致伸缩微纳结构材料日益增长的需求，分析和设计磁致伸缩纤维带膜的动态驱动特性是进一步提高其工作性能的关键。本文创新性地提出了一种状态空间模型来表征具有不同结构参数的纤维带膜在外加磁场作用下的动态磁致伸缩变形。首次将纤维结构明确地纳入其电磁力学动态特性的描述中。相位轨迹分析揭示了驱动过程中的稳定性边界，并模拟了不同磁场下的时域特性。结果表明，随着驱动电流的增大，磁致伸缩性能有所提高，在临界电流为0.9A时出现了分岔行为。此时，薄膜表现出双稳态特性，在两个稳定的平衡位置之间反复过渡。这种运动可以通过势井交叉积累和释放能量，从而实现大的磁致伸缩变形输出。最后，分析了驱动电流在不同频率和幅值下的输出特性，在3.1A偏置和交流励磁联合作用下，输出最大变形为208 μm。这些研究结果为设计高输出柔性磁电换能器提供了理论依据。

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引用次数: 0

Frequency-dependent viscoelastic crosslinked polyether elastomer and nano-silica synergistically enhance the impact resistance of Kevlar laminates 频率相关的粘弹性交联聚醚弹性体和纳米二氧化硅协同增强了凯夫拉层压板的抗冲击性

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-28 DOI: 10.1016/j.compstruct.2026.120113

Zihao Huang, Biao Yang

A crosslinked polyether (CPE) elastomer with a dual network architecture of covalent and hydrogen bonds was developed to address challenges of shear-thickening fluid (STF)/fabric laminates in structural stability, water resistance, and thermal adaptability. CPE exhibits unique viscoelastic behaviors, a prominent loss modulus peak (85 Hz) under oscillatory shear, and frequency-dependent tan δ peaks with significantly enhanced high-frequency shear damping in the dynamic mechanical analysis. The addition of nano-silica significantly improves the tensile strength of CPE and impact resistance of both CPE and CPE/Kevlar laminates. Drop ball test demonstrates that both neat and nano-silica filled CPEs achieve nearly complete energy absorption over an impact energy range of 0.1–1.93 J. CPE enables the CPE/Kevlar laminates with substantially higher fiber volume fraction of (86.4%) and impact resistance compared to conventional Kevlar laminates. 15% nano-silica filled CPE/Kevlar laminate presents an impact energy absorption of 52.5 J (at a 1 mm indentation) and an area density efficiency of 13 J·m²/kg in drop-weight impact tests. Split Hopkinson pressure bar (SHPB) impact tests revealed excellent maximum impact stress and impact toughness (988 MPa and 469MJ m⁻³ at 3500 s⁻¹ strain rate, 1298 MPa and 539 MJ m⁻³ at 7500 s⁻¹ strain rate).

一种具有共价键和氢键双网络结构的交联聚醚（CPE）弹性体被开发出来，以解决剪切增稠流体(STF)/织物层压板在结构稳定性、耐水性和热适应性方面的挑战。在动态力学分析中，CPE表现出独特的粘弹性行为，在振荡剪切作用下有一个显著的损耗模量峰值（85 Hz），在高频剪切阻尼显著增强的情况下，其tan δ峰值与频率相关。纳米二氧化硅的加入显著提高了CPE和CPE/Kevlar层压板的抗拉强度和抗冲击性。跌落球测试表明，在0.1-1.93 j的冲击能量范围内，纯CPE和纳米二氧化硅填充的CPE/Kevlar层压板几乎完全吸收了能量，与传统的Kevlar层压板相比，CPE/Kevlar层压板具有更高的纤维体积分数（86.4%）和抗冲击性。15%纳米二氧化硅填充CPE/Kevlar层压板在落锤冲击试验中，冲击能量吸收为52.5 J（在1mm压痕处），面积密度效率为13 J·m2/kg。劈开霍普金森压杆（SHPB）冲击试验显示出优异的最大冲击应力和冲击韧性（在3500 s−1应变速率下为988 MPa和469MJ m−3，在7500 s−1应变速率下为1298 MPa和539 MJ m−3）。

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引用次数: 0

Mesoscale damage modeling of 3D woven composites under quasi-static loads: Incorporating plasticity and fiber misalignment 准静态载荷下三维编织复合材料的细观损伤建模：考虑塑性和纤维错位

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-28 DOI: 10.1016/j.compstruct.2026.120111

Hongjian Wei , Xianglin Huang , Xiongwen Jiang , Wenbo Xie , Yue Li , Geng Zhao , Wei Zhang

In this paper, a high-fidelity mesoscale elastic–plastic damage model is developed for 3D woven composites (3DWCs) that fully couples the plastic behavior of yarns and matrix. A novel transversely isotropic elastic–plastic damage constitutive law is proposed to capture the nonlinear behavior of yarns, explicitly integrating stress–strain data of yarns under various loading conditions. To predict fiber kinking failure under compressive loading, an efficient and numerically tractable failure criterion is developed, accounting for fiber misalignment. Quasi-static tensile and compressive tests were conducted along the warp direction of 3DWCs, followed by post-test damage characterization using micro X-ray computed tomography. The proposed mesoscale model accurately predicts the macroscopic response and reproduces experimental strain fields acquired by digital image correlation, demonstrating its validity. By combining experimental and numerical results, the study offers new insights into the complex damage mechanisms of 3DWCs under quasi-static tensile and compressive loading. A parametric study further investigates the influence of fiber misalignment on compressive failure, and the role of the constituent material plasticity on mesoscale modeling results is discussed. The developed mesoscale model offers broad applicability for damage assessment in woven composites, and the study serves as a valuable reference for understanding damage mechanisms and mesoscale modeling of 3DWCs.

本文建立了三维机织复合材料的高保真细观弹塑性损伤模型，该模型充分耦合了纱线和基体的塑性行为。提出了一种新的横向各向同性弹塑性损伤本构律，明确地综合了不同载荷条件下纱线的应力-应变数据，以捕捉纱线的非线性行为。为了预测纤维在压缩载荷下的扭结破坏，提出了一种有效的、数值可处理的纤维失向破坏准则。沿着3DWCs的翘曲方向进行准静态拉伸和压缩测试，然后使用微x射线计算机断层扫描进行测试后的损伤表征。所提出的中尺度模型能准确预测宏观响应，并能再现数字图像相关获得的实验应变场，验证了模型的有效性。通过实验与数值结果的结合，为三维dwcs在准静态拉伸和压缩载荷作用下的复杂损伤机制提供了新的认识。参数化研究进一步探讨了纤维错位对压缩破坏的影响，并讨论了组成材料塑性对中尺度模拟结果的作用。所建立的细观尺度模型对编织复合材料损伤评估具有广泛的适用性，为理解三维复合材料损伤机理和细观尺度建模提供了有价值的参考。

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引用次数: 0

Dynamic tuning of shear horizontal waves in flexoelectric–piezoelectric composites with imperfect interfaces on semiconductor substrates 半导体基板上具有不完美界面的柔性电-压电复合材料剪切水平波的动态调谐

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-28 DOI: 10.1016/j.compstruct.2026.120061

Shreya Shukla, Sanjeev A. Sahu

Shear horizontal (SH) wave propagation in smart composite structures offers significant potential for acoustic device applications, but current structures with dielectric substrates lack means for active tuning. This study addresses this limitation by analytically identifying new physical regimes that emerge from the combined effects of flexoelectric gradients, mobile semiconductor carriers, and interfacial imperfections. SH wave dispersion and attenuation are investigated for a flexoelectric-piezoelectric layer on an n-type piezoelectric semiconductor half-space with a mechanically imperfect interface. The operator elimination technique is employed to solve the governing differential equations and obtain explicit, closed-form solutions under electrically open and shorted boundary conditions. Results reveal an interfacial compliance range

(m \approx 8 to 12)

beyond which additional stiffness yields limited phase velocity gains and stabilized attenuation. This observation indicates a saturation regime in interface effects. A thickness-dependent crossover also emerges where ultra-thin films are dominated by flexoelectric gradients resulting in higher losses, whereas in thicker films, enhanced carrier dynamics lead to increased phase velocity and reduced attenuation. The analytical formulation is further corroborated through independent numerical validation, confirming the reliability of the proposed multiphysics framework.

剪切水平（SH）波在智能复合材料结构中的传播为声学器件的应用提供了巨大的潜力，但目前的介质基板结构缺乏主动调谐的手段。本研究通过分析确定由柔性电梯度、移动半导体载流子和界面缺陷的综合效应产生的新物理机制来解决这一限制。研究了具有机械缺陷界面的n型压电半导体半空间上挠性压电层的SH波色散和衰减。利用算子消去技术求解控制微分方程，得到电开边界和短路边界条件下的显式闭解。结果表明，界面柔度范围（m≈8 ~ 12）超过该范围，额外的刚度产生有限的相速度增益和稳定的衰减。这一观察结果表明界面效应存在饱和状态。当超薄薄膜由柔性电梯度主导导致更高的损耗时，也会出现厚度相关的交叉，而在较厚的薄膜中，增强的载流子动力学导致相速度增加和衰减减少。通过独立的数值验证进一步证实了解析公式，证实了所提出的多物理场框架的可靠性。

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引用次数: 0

Vibration fatigue behavior and failure mechanism of 3D layer-to-layer interlock woven composites 三维层间互锁编织复合材料的振动疲劳行为及破坏机理

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-24 DOI: 10.1016/j.compstruct.2026.120099

Jiahui Wei , Yifan Zhang , Xiaojia Wu , Dianshen Li , Qiwei Guo , Daijun Zhang , Chao Li , Yanfeng Liu , Pengfei Jiang , Yingjie Yan , Junhua Guo , Yanan Jiao , Li Chen

3D layer-to-layer interlock woven composites (3D LTLIWCs) are inevitably subjected to the severe cyclic vibration fatigue environment in the application of aero-engine structures and their durability should be proven. In this paper, three 3D LTLIWCs with different preform structure types are prepared by adjusting warp interlacing frequency. First-order cantilever bending resonance tests are conducted at four stress levels to evaluate dynamic response. The characterization capabilities of two fatigue life models are compared. The interrupted fatigue tests incorporating with optical microscopy and micro-computed tomography are employed to illustrate damage evolution. The results show that the fatigue life of 3D LTLIWCs decreases gradually with increasing stress levels. However, due to its lowest warp interlacing frequency, the SS structure effectively dissipates and transfers fatigue stress, resulting in the longest fatigue life among all structures. The frequency degradation occurs in three phases: stable, linear, and accelerating. Compared to the Basquin model, the Weibull model demonstrates superior fitting capability and predictive accuracy, and is used to was used to estimate the stress limit values of PS, TS, and SS that can withstand 10⁷ cycles without failure, which are 125 MPa, 134 MPa, and 173 MPa respectively. The damage undergoes an evolution process involving matrix cracking, interfacial debonding, fiber bundle splitting, and yarn fracture. Besides, the interfacial debonding length of SS is longer than that of PS and TS, but its warps is not prone to catastrophic shear fracture and the overall damage degree is low.

三维层间互锁编织复合材料（3D LTLIWCs）在航空发动机结构应用中不可避免地要经受剧烈的循环振动疲劳环境，其耐久性需要得到验证。本文通过调整经纱交织频率，制备了三种不同预制体结构类型的三维ltliwc。在四种应力水平下进行了一阶悬臂梁弯曲共振试验，以评估其动力响应。比较了两种疲劳寿命模型的表征能力。采用光学显微镜和显微计算机断层扫描相结合的中断疲劳试验来描述损伤的演变过程。结果表明：随着应力水平的增加，三维ltliwc的疲劳寿命逐渐降低；然而，由于其最低的经纱交织频率，SS结构有效地消散和传递疲劳应力，使其疲劳寿命在所有结构中最长。频率衰减发生在三个阶段：稳定、线性和加速。与Basquin模型相比，Weibull模型具有更好的拟合能力和预测精度，可用于估计PS、TS和SS在125 MPa、134 MPa和173 MPa的107次循环下不失效的应力极限值。损伤经历了基体开裂、界面剥离、纤维束劈裂和纱线断裂的演化过程。此外，SS的界面剥离长度比PS和TS长，但其翘曲不易发生突变剪切断裂，整体损伤程度较低。

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引用次数: 0

Pin-loaded hole contact in anisotropic multi-layered/functionally graded composite plate 各向异性多层/功能梯度复合板的针载孔接触

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-24 DOI: 10.1016/j.compstruct.2026.120103

Trong Khanh Huy Nguyen , Van Thuong Nguyen , Van Luan Nguyen , Xuan Thanh Nguyen

Pin-loaded joints in anisotropic multilayered/functionally graded materials (FGMs) are a challenging contact problem due to the combination of the nonlinearity of the contact and the anisotropy and spatial variation of material properties. To address this challenging problem, a new contact boundary-based finite element method (contact-BFEM) is developed to model the contact between a rigid cylindrical pin and an anisotropic multilayered/FGM plate. The contact BFEM allows for various configurations, including loose, transition, and interference fits, by permitting differences between the pin and hole radii. The anisotropic multilayered/functionally graded material plate is approximated by N anisotropic sub-layers, with material properties varying in the radial direction according to prescribed gradation rules. Contact constraints are rigorously enforced at discrete contact nodes and resolved through an iterative procedure. The proposed method is validated through comparison with existing methods in the literature. Its flexibility enables comprehensive parametric studies involving different types of multilayered and FGM materials. The numerical results also allow for the investigation of a wide range of influencing factors, including pin size, friction coefficient, insert or fastener material, adhesive layer thickness, auxetic behavior, and gradation properties on the contact and mechanical responses of pin-loaded joints in a multilayered/FGM plate.

各向异性多层/功能梯度材料（fgfms）中的引脚加载接头由于其接触的非线性和材料性能的各向异性和空间变化相结合，是一个具有挑战性的接触问题。为了解决这一具有挑战性的问题，提出了一种新的基于接触边界的有限元方法（contact- bfem）来模拟刚性圆柱销与各向异性多层/FGM板之间的接触。通过允许销和孔半径之间的差异，接触BFEM允许各种配置，包括松散、过渡和过盈配合。各向异性多层/功能梯度材料板由N个各向异性子层近似而成，材料性能按规定的梯度规则沿径向变化。在离散的接触节点上严格执行接触约束，并通过迭代过程解决。通过与文献中已有方法的比较，验证了所提方法的有效性。它的灵活性使涉及不同类型的多层和FGM材料的综合参数研究成为可能。数值结果还允许研究广泛的影响因素，包括销尺寸，摩擦系数，插入或紧固件材料，胶粘剂层厚度，auxetic行为以及多层/FGM板中销加载连接的接触和力学响应的级配特性。

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引用次数: 0

Reactive dye-reinforced PVA-based high-strength, highly conductive coloured hydrogel flexible sensors for joint monitoring and pressure sensing 活性染料增强pva基高强度，高导电性彩色水凝胶柔性传感器，用于关节监测和压力传感

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-23 DOI: 10.1016/j.compstruct.2026.120084

Tiantian Wang , Tong Yu , Chengrui Jiang , Yan Yu , Jiayi Fu , Jinbo Zhu , Qun Zhang , Jiajiu Liang , Zhebin Xue , Ruoxin Li , Guangtao Chang

Currently, hydrogel sensors utilizing polyvinyl alcohol (PVA) and chitosan (CS) as flexible substrates are receiving increasing attention in wearable applications. With the proliferation of high-cost conductive materials, how to reduce the cost of conductive materials while imparting excellent conductivity to hydrogels has become a hot topic. This study innovatively employs commercial reactive dyes (reactive blue 194, reactive yellow 145, reactive red 195) as multifunctional additives to construct PVA/CS hydrogels. This strategy enables a single dye to simultaneously fulfill three functions: providing conductivity through its ionic nature, enhancing mechanical properties via physical interactions with the polymer, and imparting stable coloring to the system. Compared to expensive novel conductive materials, this design significantly reduces costs while maintaining high performance. Additionally, through one-pot synthesis, freeze–thaw cycling, and glycerol impregnation, multifunctional colored hydrogels were successfully fabricated: exhibiting tensile strength of 6.29 MPa, elongation at break of 497%, toughness and Young’s modulus of 16 MJ/m³ and 1.87 MPa, respectively, with electrical conductivity reaching 0.95 S/m. This material demonstrates high sensitivity in strain sensing, cyclic sensing, motion detection, and pressure sensing (GF = 6.12), with a response time of 43 ms. It offers novel insights and approaches for achieving coloration and multifunctionality in smart flexible sensors.

目前，以聚乙烯醇（PVA）和壳聚糖（CS）为柔性衬底的水凝胶传感器在可穿戴应用中受到越来越多的关注。随着高成本导电材料的大量涌现，如何在降低导电材料成本的同时赋予水凝胶优异的导电性成为一个热门话题。本研究创新性地采用商业活性染料（活性蓝194、活性黄145、活性红195）作为多功能添加剂构建PVA/CS水凝胶。这种策略使单个染料同时实现三个功能：通过其离子性质提供导电性，通过与聚合物的物理相互作用增强机械性能，并赋予系统稳定的着色。与昂贵的新型导电材料相比，这种设计在保持高性能的同时显著降低了成本。通过一锅法合成、冻融循环和甘油浸渍，成功制备出多功能彩色水凝胶，抗拉强度为6.29 MPa，断裂伸长率为497%，韧性和杨氏模量分别为16 MJ/m3和1.87 MPa，电导率达到0.95 S/m。该材料在应变传感、循环传感、运动检测和压力传感方面具有很高的灵敏度（GF = 6.12），响应时间为43 ms。它为实现智能柔性传感器的色彩和多功能提供了新颖的见解和方法。

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引用次数: 0

A phase-field model for thermal–mechanical–chemical coupling analysis of carbon/carbon composites 碳/碳复合材料热-力-化学耦合分析的相场模型

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-21 DOI: 10.1016/j.compstruct.2026.120088

Xingyu Zhang, Meng Han

The failure of Carbon/Carbon (C/C) composites in high-temperature service environments invariably results from the synergistic interaction of oxidation and fracture. A phase-field model is developed for thermal–mechanical–chemical coupling in C/C composites, systematically considering thermochemical ablation and mechanical fracture along with their synergistic effects. The model integrates thermal, oxygen reaction–diffusion, and mechanical damage within a unified multiphysics framework, in which mechanical degradation is captured through a reaction–diffusion equation and phase–field–dependent damage constitutive laws. The model is validated through multiscale analyses, including stressed oxidation tests at the microscale and post-oxidation tensile failure simulations of the Representative Volume Element (RVE) at the mesoscale. The framework elucidates the synergistic mechanisms of oxidation and crack evolution in high-temperature environments and clarifies the influence of oxidation time, temperature, and diffusion–reaction regimes on the degradation of mechanical properties. It provides a unified and reliable multiscale tool for evaluating failure mechanisms and damage tolerance of C/C composites in oxidative environments.

碳/碳（C/C）复合材料在高温环境下的失效是氧化和断裂协同作用的结果。建立了C/C复合材料热-力学-化学耦合相场模型，系统地考虑了热化学烧蚀和力学断裂及其协同效应。该模型在统一的多物理场框架内集成了热、氧反应扩散和机械损伤，其中通过反应扩散方程和相场相关的损伤本构律捕获机械退化。该模型通过多尺度分析进行了验证，包括微尺度的应力氧化试验和中尺度的代表性体积元（RVE）氧化后拉伸破坏模拟。该框架阐明了高温环境下氧化和裂纹演化的协同机制，并阐明了氧化时间、温度和扩散反应机制对力学性能退化的影响。它为评价C/C复合材料在氧化环境下的失效机理和损伤容限提供了统一可靠的多尺度工具。

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引用次数: 0

Limits of analytical models of sandwich structures for optimization 夹层结构优化分析模型的局限性

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-21 DOI: 10.1016/j.compstruct.2026.120089

Vladimír Hostinský , Jurij Sodja , Ivo Jebáček , Jan Navrátil

Current advances in the structural optimization of aircraft structures have led to the introduction of sandwich panels into the optimization process. This study attempts to extend the possibilities of sandwich optimization by proposing an analytical model which predicts the homogenized properties of a sandwich panel with a honeycomb core and CFRP skins. The model is based on a combination of Classical laminate theory and a 1-D beam model of the honeycomb core. The finite-element equivalent of tensile and shear tests is used to validate the proposed model on a broad range of core geometries with different combinations of core thickness, wall angle, cell elongation, and cell wall thickness. The results of 425 different geometries showed the overall precision of the proposed model, highlighted effects in the behavior of the core that drive the sandwich properties further from the predicted values, and suggested which parts of the model are suitable for optimization and where are their limits of applicability.

当前飞机结构优化的进展使得夹层板被引入到优化过程中。本研究试图通过提出一个分析模型来扩展夹层优化的可能性，该模型预测了具有蜂窝芯和CFRP皮的夹层板的均质特性。该模型是基于经典层压理论和蜂窝芯的一维梁模型的结合。拉伸和剪切试验的有限元当量用于在广泛的岩心几何形状上验证所提出的模型，这些几何形状具有岩心厚度、壁角、岩心延伸率和岩心壁厚度的不同组合。425种不同几何形状的结果显示了所提出模型的整体精度，突出了核心行为的影响，使三明治属性进一步偏离预测值，并建议了模型的哪些部分适合优化，以及它们的适用性限制在哪里。

引用次数: 0

Bimaterial honeycomb structures additively manufactured with short carbon fiber composites: Design proposition, asymptotic homogenization and properties testing 短碳纤维复合材料增材制造双材料蜂窝结构：设计主张、渐近均质化及性能测试

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-20 DOI: 10.1016/j.compstruct.2026.120071

Ariangelo Hauer Dias Filho , Benjamim de Melo Carvalho , Andrew Colin Gleadall , Rafael Thiago Luiz Ferreira

Additive manufacturing allows the production of multiphase structures with customizable mechanical properties. This study proposes a unit cell for bimaterial honeycombs, followed by experimental and numerical tests. The honeycombs were fabricated by FFF (fused filament fabrication) material extrusion using PET and PET-CF (PET with short carbon fibers), with tool paths generated directly in FullControl design software. Each beam of the unit cell contains both materials side-by-side (double-wall configuration). The composite content is adjustable by varying the thicknesses of the phases, allowing modulation of equivalent properties. Compression tests evaluated the mechanical behavior, while Asymptotic Homogenization (AH) was used to numerically estimate the equivalent properties. Response surfaces based on AH were developed to estimate variations in equivalent properties as a function of composite content. The experimental and numerical results showed strong agreement. The main contribution of this work is the proposal of honeycombs with tailorable mechanical properties, supported by numerical simulations and experiments. The proposed honeycombs have the potential to modulate mechanical properties, as demonstrated through the design of composite material phases: certain configurations exhibit increased structural performance while maintaining a similar use of expensive reinforcing material in terms of volume fraction. These findings highlight the potential for functionally tailored structures in lightweight engineering applications.

增材制造允许生产具有可定制机械性能的多相结构。本研究提出了一种双材料蜂窝单元，并进行了实验和数值测试。在FullControl设计软件中直接生成刀具轨迹，采用FFF（熔融长丝制造）材料挤压PET和PET- cf（带有短碳纤维的PET）制造蜂窝。单元格的每个梁包含并排的两种材料（双壁结构）。复合成分可通过改变相的厚度来调节，从而允许等效性质的调制。压缩试验评估了力学性能，而渐近均匀化（AH）用于数值估计等效性能。基于AH的响应面被开发来估计等效性质的变化作为复合材料含量的函数。实验结果与数值计算结果吻合较好。这项工作的主要贡献是提出了具有可定制力学性能的蜂窝，并得到了数值模拟和实验的支持。所提出的蜂窝具有调节机械性能的潜力，正如复合材料相的设计所证明的那样：某些配置表现出增加的结构性能，同时在体积分数方面保持类似使用昂贵的增强材料。这些发现突出了在轻量化工程应用中功能定制结构的潜力。

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引用次数: 0