【新文速递】2025年4月16日复合材料SCI期刊最新文章

   

今日更新：Composite Structures 1 篇，Composites Part B: Engineering 6 篇，Composites Science and Technology 3 篇

Composite Structures

Effects of grinding parameters on material failure mechanisms of 2D silicon carbide fiber-reinforced silicon carbide composites

Yao Liu, Zhaokun Zhang, Jiahao Li, Jinzhu Guo, Jinjie Zhou, Chunlei K. Song

doi:10.1016/j.compstruct.2025.119175

磨削参数对二维碳化硅纤维增强碳化硅复合材料破坏机制的影响

The Silicon Carbide Fiber-Reinforced Silicon Carbide (SiCf/SiC) composite is widely used in ultra-high-temperature applications due to its exceptional properties, but its brittleness makes machining, especially grinding, challenging. This study investigates the failure modes of fibers and the matrix during grinding of 2D SiCf/SiC composites under varying process parameters, such as wheel speed, feed rate, grinding depth, and surface structure. The results show that transverse fibers undergo ductile removal, shear fracture, bending fracture, and tensile fracture, while longitudinal fibers primarily experience ductile removal, tensile fracture, and bending fracture and normal fibers mainly exhibit shear and bending fractures. The matrix exhibits ductile, brittle, powdery, and peel-off removal modes. Grinding the woven surface (WS) leads to higher grinding forces and surface roughness than the stacking surface (SS), due to differences in fracture mechanisms. The primary material removal mechanisms of grinding wheel are friction wear and grit breakage, resulting from the high hardness of SiCf/SiC. Increasing wheel speed reduces both grinding force and surface roughness by promoting ductile removal, which is attributed to decreased undeformed chip thickness and enhanced strain toughness. The optimal grinding conditions are high wheel speed and sharp grit on the SS, yielding the best surface quality.

碳化硅纤维增强碳化硅（SiCf/SiC）复合材料由于其特殊的性能被广泛应用于超高温应用，但其脆性使得加工，特别是磨削，具有挑战性。研究了在砂轮速度、进给速率、磨削深度和表面结构等不同工艺参数下，二维SiCf/SiC复合材料磨削过程中纤维和基体的破坏模式。结果表明：横向纤维主要发生韧性去除、剪切断裂、弯曲断裂和拉伸断裂，纵向纤维主要发生韧性去除、拉伸断裂和弯曲断裂，正常纤维主要发生剪切断裂和弯曲断裂。基体表现出延展性、脆性、粉末状和剥离去除模式。由于断裂机制的不同，对编织表面（WS）的磨削力和表面粗糙度要高于堆积表面（SS）。由于SiCf/SiC的高硬度，砂轮的主要去除机制是摩擦磨损和磨粒破碎。提高砂轮速度可以通过促进韧性去除来降低磨削力和表面粗糙度，这是由于减小了未变形的切屑厚度和提高了应变韧性。最佳的磨削条件是高砂轮速度和在SS上锋利的磨粒，产生最佳的表面质量。

Composites Part B: Engineering

A finite volume approach for general fully coupled anisotropic porous solid mechanics of fiber reinforcements in Liquid Composite Molding

Sarah Schlegel, Florian Wittemann, Luise Kärger

doi:10.1016/j.compositesb.2025.112448

液体复合材料成型中纤维增强材料全耦合各向异性多孔固体力学的有限体积法

In this work, a finite volume method is developed to capture the interaction between the infiltrating resin and the deforming fiber reinforcement in liquid composite molding (LCM). The method consists of three parts: (1) the fluid flow through a porous medium, which depends on the fiber volume fraction (FVF) and the fiber orientation, (2) the solid mechanics of the porous fiber structure considering the general anisotropic material stiffness, which also depends on the FVF and the fiber orientation, and (3) an internal coupling approach to couple porous solid mechanics and fluid flow with an iterative scheme. An anisotropic model of porous solid mechanics is proposed and verified in a unidirectional case to capture fluid-induced deformations of the porous medium. In a second verification case, the stress state is verified in an open-hole tensile test against an analytical solution for different degrees of material anisotropy. Finally, the infiltration and compaction predictions of the model are validated against experimental data from the literature using a three-dimensional plate. In addition, the infiltration behavior with the anisotropic model is compared to the isotropic model to illustrate the advantage of the new approach.

在这项工作中，开发了一种有限体积法来捕捉液体复合成型（LCM）中浸润树脂与变形纤维增强物之间的相互作用。该方法由三部分组成：(1)流体在多孔介质中的流动，这取决于纤维体积分数（FVF）和纤维取向；(2)考虑一般各向异性材料刚度的多孔纤维结构的固体力学，这也取决于纤维体积分数和纤维取向；(3)采用迭代格式将多孔固体力学和流体流动耦合起来的内部耦合方法。提出了多孔介质力学的各向异性模型，并在单向情况下验证了该模型的正确性。在第二个验证案例中，应力状态在裸眼拉伸试验中根据不同程度的材料各向异性的解析解进行验证。最后，利用三维板对模型的入渗和压实预测进行了验证。此外，将各向异性模型的入渗行为与各向同性模型进行了比较，以说明新方法的优越性。

Highly thermal conductivity phase change composites enabled by SiCw reinforced graphite foam dual-network for high-efficiency thermal harvesting

Hongwei Zhong, Zhuo Deng, Ke Wang, Qin Zhang, Jianguang Guo, Baoliu Li, Hui Zhu, Xuanke Li

doi:10.1016/j.compositesb.2025.112496

 

高导热相变复合材料由SiCw增强石墨泡沫双网络实现高效热收集

Phase change composites (PCCs) for the thermal management of high-energy density device are required to have large heat storage capacity and rapid heat conduction and dissipation ability. A graphite foam (GF)/silicon carbide whiskers (SiCw) dual-network skeleton with abundant pore capacity for loading paraffin wax (PW) was designed and fabricated. The highly oriented carbon walls of GFs as the main channels for fast thermal transportation and SiCw formed in GF pores as the secondary heat conductive networks provide GF-SiCw/PW with highly efficient thermal energy harvesting and releasing ability. The prepared GF-SiCw-2 composite loaded with 48.99 wt% of PW exhibits an excellent thermal conductivity of 249.7 W m−1 K−1 and fast thermal response characters. In addition, finite element simulation confirmed that the SiCw network could significantly improve the uniformity of heat transfer inside the PCCs. No PW leakage, homogeneity and superior phase change behavior were observed in GF-SiCw-2/PW. The excellent battery thermal management of GF-SiCw-2/PW was also confirmed. This innovative structure design suggests an efficient route for the development of phase change thermal management system with high heat conductivity, and shows extensive application prospects.

用于高密度器件热管理的相变复合材料（PCCs）要求具有较大的蓄热能力和快速的导热和散热能力。设计并制备了具有丰富孔隙容量的泡沫石墨/碳化硅晶须（SiCw）双网骨架，用于装载石蜡。GF-SiCw/PW具有高效的热能收集和释放能力，其高取向的碳壁是快速热传递的主要通道，而在GF孔中形成的SiCw作为二次导热网络。制备的GF-SiCw-2复合材料的导热系数为249.7 W m−1 K−1，热响应特性快速。此外，有限元模拟证实了SiCw网络可以显著改善PCCs内部传热的均匀性。GF-SiCw-2/PW材料无泄漏、均匀性和良好的相变行为。GF-SiCw-2/PW优异的电池热管理性能也得到了证实。这种创新的结构设计为开发高导热相变热管理系统提供了一条有效途径，具有广阔的应用前景。

A novel biomimetic strategy for improving lubrication performances of modified UHMWPE inspired by the slippery gel release behavior of chia seeds

Zhanmo Zheng, Conglin Dong, Xiuqin Bai, Chengqing Yuan, Tun Cai

doi:10.1016/j.compositesb.2025.112520

受奇亚籽滑凝胶释放特性启发的改进改性超高分子量聚乙烯润滑性能的仿生策略

Friction, wear, and their induced vibrations are the major problems observed in water-lubricating polymer components of mechanical equipment, as achieving effective lubricating films remains challenging due to the low viscosity and surface tension of water. Inspired by the self-protection mechanism of chia seeds, which release slippery mucilage under aqueous conditions, a novel biomimetic composite composed of natural chia seed polysaccharide (CSP) and ultrahigh molecular weight polyethylene (UHMWPE) is proposed. Because of its hydrophilicity, CSP within the composite can easily attract water molecules through non-covalent interactions in aqueous conditions, leading to its softening, swelling, and exudation to hydrate and form a gel layer with lubricating and protective effects at the friction interface, which is similar to the behavior of chia seeds in releasing gels. The resultant composite achieves a low coefficient of friction (COF) (below 0.031), which is attributable to the synergistic effect of fluid and hydration lubrication provided by the improvement in hydrophilicity, the increase in viscosity of the water-lubricating medium, and the formation of the hydration lubrication layer. This biomimetic strategy opens up a new avenue for treating the problems of insufficient lubrication, and the proposed composite shows potential for mitigating the friction-induced vibration and noise behaviors of underwater mechanical devices.

摩擦、磨损及其引起的振动是机械设备中水润滑聚合物部件存在的主要问题，由于水的低粘度和表面张力，获得有效的润滑膜仍然具有挑战性。摘要根据奇亚籽在水环境下释放滑滑粘液的自我保护机制，提出了一种由天然奇亚籽多糖（CSP）和超高分子量聚乙烯（UHMWPE）组成的仿生复合材料。由于其亲水性，复合材料内部的CSP在水条件下容易通过非共价相互作用吸引水分子，导致其软化、膨胀、渗出水化，在摩擦界面处形成具有润滑和保护作用的凝胶层，类似于奇亚籽释放凝胶的行为。得到的复合材料具有较低的摩擦系数（COF）（小于0.031），这是由于亲水性的改善、水润滑介质粘度的增加以及水化润滑层的形成提供了流体和水化润滑的协同作用。这种仿生策略为解决润滑不足问题开辟了一条新的途径，并且所提出的复合材料显示出减轻水下机械设备摩擦引起的振动和噪声行为的潜力。

Hierarchical porous kapok fiber composite aerogel with Helmholtz resonant cavity for low-frequency sound absorption

Liting He, Lulu Song, Jing Fang, Hao Li, Ming Luo, Qixiu Cheng, Xiaoang Liu

doi:10.1016/j.compositesb.2025.112523

 

分层多孔木棉纤维复合气凝胶具有低频吸声的亥姆霍兹谐振腔

The demand for advanced materials with low-frequency sound absorption, pressure resistance, and thermal insulation is increasing, particularly in aerospace, high-speed rail, and luxury automotive sectors. However, the functional limitations of current materials hinder their broader application in high-end industries. To solve this problem, this study combines a hierarchical porous biomass aerogel with a resonant cavity to create a Helmholtz resonance sound absorption structure. This design aims at achieving multiple functions, including low-frequency sound absorption, heat insulation, and pressure resistance capability. The sound absorption structure is composed of porous biomass aerogel instead of the traditional perforated plate and cavity. Among them, the hierarchical porous biomass aerogel is obtained from delignified kapok fiber and activated carbon crosslinked by gelatin. The influence of activated carbon concentration, resonant cavity depth and aerogel perforation rate on the low-frequency sound absorption effect in this aerogel is explored. The sound absorption structure demonstrates excellent low-frequency sound absorption performance. Additionally, the aerogel exhibits thin (the thickness of the aerogel material is 10 mm, the sound absorption structure is 30 mm), high compressive strength, and low thermal conductivity. This study provides a new idea for the preparation of multifunctional low-frequency sound absorption materials.

对具有低频吸声、抗压和隔热性能的先进材料的需求正在增加，特别是在航空航天、高速铁路和豪华汽车领域。然而，现有材料的功能限制阻碍了其在高端行业的广泛应用。为了解决这一问题，本研究将分层多孔生物质气凝胶与谐振腔相结合，创建了亥姆霍兹共振吸声结构。本设计旨在实现多种功能，包括低频吸声、隔热和抗压能力。该吸声结构由多孔生物质气凝胶组成，取代了传统的多孔板和腔体。其中，以去木棉纤维与明胶交联的活性炭为原料制备了分级多孔生物质气凝胶。探讨了活性炭浓度、谐振腔深度和气凝胶穿孔率对该气凝胶低频吸声效果的影响。该吸声结构具有良好的低频吸声性能。此外，气凝胶具有薄（气凝胶材料厚度为10 mm，吸声结构为30 mm），抗压强度高，导热系数低的特点。本研究为多功能低频吸声材料的制备提供了新的思路。

Hierarchical array hosts with concave spatial confinement and zincophilic seed mediated growth for dendrite-free Zn metal anode

Feng Yang, Cong Tian, Liyi Bai, Tianyu Zhang, Hongfei Wang, Jiqiang Ning, Yong Hu

doi:10.1016/j.compositesb.2025.112528

 

无枝晶锌金属阳极的凹空间约束和亲锌种子介导生长层次化阵列宿主

Uneven distribution problems with Zn electrodeposition have emerged as a major obstacle to the development of Zn-ion batteries. A hierarchical array is proposed in this work to synthesize a three-dimensional Zn anode host, composed of Bi-loaded N-doped carbon triangular plates containing carbon nanotubes (Bi/NC-CNTs@CC), and uniform Zn electrodeposition has been achieved through a synergistic regulation strategy of concave spatial confinement and a “microchannel-filling” zincophilic seed mediated growth. The architecture of evenly arranged arrays contributes to homogenizing the surface electric field and reducing the interfacial polarization due to a geometrical confinement effect. The rationally distributed zincophilic Bi particles can further favor the preferential Zn nucleation, verified by both theoretical calculations and electrochemical measurements. The delicately constructed Bi/NC-CNTs@CC host exhibits a high Coulombic efficiency of 99.9% over 1700 cycles in an asymmetric cell and elongates the Zn plating/stripping lifespan to 8000 h after pre-plating 6 mAh cm–2 of Zn (Bi/NC-CNTs@CC-Zn) in a symmetric cell. Moreover, a full battery assembled by the Bi/NC-CNTs@CC-Zn anode and a MnO2 cathode demonstrates a high specific capacity of 293.3 mAh g–1 at 0.2 A g–1 and a stable capacity retention of 87.1% over 1000 cycles.

锌电沉积的不均匀分布问题已成为制约锌离子电池发展的主要障碍。本文提出了一种层次化阵列来合成三维Zn阳极主体，该主体由含碳纳米管（Bi/NC-CNTs@CC）的负载双氮掺杂碳三角形板组成，并通过凹形空间约束和“微通道填充”亲锌种子介导生长的协同调节策略实现了均匀的Zn电沉积。均匀排列的阵列结构有助于表面电场的均匀化，并且由于几何约束效应而降低了界面极化。理论计算和电化学测量结果均证实，亲锌Bi粒子的合理分布有利于Zn的优先成核。精心构建的Bi/NC-CNTs@CC宿主在不对称电池中1700次循环中显示出99.9%的高库仑效率，并在对称电池中预镀6 mAh cm-2的Zn （Bi/NC-CNTs@CC-Zn）后将镀锌/剥脱寿命延长至8000 h。此外，由Bi/NC-CNTs@CC-Zn阳极和MnO2阴极组装的完整电池在0.2 a g-1时具有293.3 mAh g-1的高比容量，并且在1000次循环中具有87.1%的稳定容量保持率。

Micromechanical study on freeze-thaw cycling hygromechanical properties of continuous fiber-reinforced thermoplastic composite prepreg filaments for 3D printing

Long Fu, Weijun Zhu, Jinshan Li, Yingying Zhang, Quan Zhi, Peng Yu, Zhikun Zhang, Wang Ning, Shiping Ouyang, Dongsheng Li

doi:10.1016/j.compositesb.2025.112529

 

3D打印用连续纤维增强热塑性复合材料预浸长丝冻融循环湿力学性能的微观力学研究

Continuous fiber-reinforced thermoplastic composites are widely used in aviation, aerospace, and automotive applications due to the high specific strength, modulus, and design flexibility. However, their properties are susceptible to damage in extreme environments. This study investigates the microscopic property changes of 3D printing thermoplastic composites in service environments with freeze-thaw cycling. we have established the relationship between interfacial crack damage in composites and the mechanical properties of sub-mm-scale prepreg fibers through experiment and simulation. By analysis of grayscale of AFM modulus map, the interfacial crack (interfacial porosity) size evolution law at the fiber- resin matrix interface was investigated. At the micro-scale, the degree of damage at the interface is strongly correlated with the shear properties of the interface, which were derived from micro-debonding experiments. At the sub-mm-scale, the mechanical properties of flexural and axial compressive strengths are sensitive to the extent of interfacial crack damage, as numerical simulation results have also predicted. Conversely, axial tensile strength is minimally affected. Furthermore, it was found that the mechanical properties of the prepreg filaments decreased significantly after re-absorption of water after freeze-thaw cycling, especially the flexural and axial compression properties decreased by 73.2% and 92.8%, respectively. Therefore, this paper designed carbon fiber/polyamide-covered-polypropylene (CF/PA-PP) water-resistant prepreg filaments with core-shell structure to reduce water absorption. The core-shell CF/PA-PP filament's mechanics are comparable to those of the CF/PA filament, with strengths of 2010.2 MPa, 1081.2 MPa, and 427.0 MPa, and it has reduced water absorption from 6.8% to 0.4%, demonstrating its promising application in the field of 3D printing of water-resistant thermoplastic composites.

连续纤维增强热塑性复合材料因其高比强度、模量和设计灵活性而广泛应用于航空、航天和汽车领域。然而，它们的性能在极端环境中容易受到破坏。研究了3D打印热塑性复合材料在冻融循环使用环境下的微观性能变化。通过实验和模拟，建立了复合材料界面裂纹损伤与亚毫米级预浸纤维力学性能之间的关系。 通过对AFM模量图的灰度分析，研究了纤维-树脂基体界面处界面裂纹（界面孔隙）尺寸的演化规律。在微观尺度上，界面的损伤程度与界面的剪切性能密切相关，这是由微观剥离实验得出的。在亚毫米尺度下，界面裂纹损伤程度对弯曲和轴向抗压强度的力学性能非常敏感，数值模拟结果也预测了这一点。相反，轴向抗拉强度受影响最小。冻融循环后再吸水后，预浸丝的力学性能明显下降，其中抗弯和轴压性能分别下降73.2%和92.8%。 因此，本文设计了具有核壳结构的碳纤维/聚酰胺覆盖聚丙烯（CF/PA-PP）防水预浸长丝，以降低吸水率。芯壳型CF/PA- pp长丝的力学性能与CF/PA长丝相当，强度分别为2010.2 MPa、1081.2 MPa和427.0 MPa，吸水率从6.8%降低到0.4%，在防水热塑性复合材料3D打印领域具有广阔的应用前景。

Composites Science and Technology

A machine learning-based prediction of biaxial failure envelope of a short fiber-reinforced polymer composite

Subrat Kumar Maharana, Ganesh Soni, Mira Mitra

doi:10.1016/j.compscitech.2025.111176

 

基于机器学习的短纤维增强聚合物复合材料双轴失效包络预测

Short-fiber reinforced polymer composites (SFRPs) consist of short and discontinuous fibers dispersed in polymer matrices. This study presents the determination of biaxial failure envelope of an SFRP specimen using an artificial neural network (ANN). The failure envelope defines the decision boundary under biaxial loading stress, distinguishing stress states inside as survival and outside as failure. The complex modeling and the high cost associated with the FE-analysis of SFRPs make the determination of the failure envelope computationally expensive. This study uses an ANN as a surrogate model to predict the biaxial failure envelopes of an SFRP specimen. The failure envelopes used for training and testing the ANN model are extracted for the SFRP specimen using a two-step homogenization, employing the first pseudo-grain failure model. The database is supplemented with experimental data from biaxial tests and FE analysis results available in the literature. An elastoplastic polymer matrix dispersed with short elastic fibers is taken for analysis. The strength parameters of the fiber and matrix and the geometrical parameters of the microstructure are varied over a range to develop a dataset for ANN training. The failure envelopes are predicted for two different unseen SFRPs using the ANN model. The ANN predictions are compared with the simulation and experimental results reported in the literature. Additionally, a parametric study is performed to investigate the effect of the key parameters of the SFRP, such as the volume fraction, aspect ratio, and orientation of the fiber.

短纤维增强聚合物复合材料（SFRPs）是由分散在聚合物基体中的短纤维和不连续纤维组成。本研究提出了利用人工神经网络（ANN）确定SFRP试件的双轴破坏包络。破坏包络线定义了在双轴加载应力下的决策边界，将内部应力状态区分为生存状态，外部应力状态区分为破坏状态。SFRPs有限元分析的复杂建模和高成本使得确定失效包络线的计算成本很高。本研究使用人工神经网络作为替代模型来预测SFRP试件的双轴破坏包络。采用第一步伪颗粒破坏模型，采用两步均质法提取SFRP试样的破坏包络，用于训练和测试人工神经网络模型。该数据库补充了文献中可用的双轴试验和有限元分析结果的实验数据。以一种分散有短弹性纤维的弹塑性聚合物基体为研究对象。纤维和基体的强度参数以及微观结构的几何参数在一定范围内变化，以建立用于人工神经网络训练的数据集。利用人工神经网络模型预测了两种不同的未见sfrp的失效包络。将人工神经网络的预测结果与文献中报道的模拟和实验结果进行了比较。此外，还进行了参数化研究，以研究SFRP的关键参数（如体积分数、长径比和纤维取向）的影响。

Highly sensitive mechanochromism and high-contrast multicolor switching in epoxy nanocomposites for stress visualization and damage monitoring

Zaiping Zou, Jiajun Li, Yingsheng Lai, Mao Chen, Yinyu Zhang, Yeping Wu, Xiuli Zhao, Zhongtao Chen

doi:10.1016/j.compscitech.2025.111184

 

用于应力可视化和损伤监测的环氧纳米复合材料的高灵敏度机械变色和高对比度多色开关

Epoxy resins are widely used in coatings and composites due to their excellent comprehensive properties, but they also present new challenges in stress sensing and damage detection. Mechanochromism, which implies that a material can change color in response to mechanical stimulation, could be a potential tool to solve this problem. However, researches on mechanochromic polymers have primarily focused on elastomers and gels. For rigid epoxy thermosets, it is still difficult to achieve significant mechanochromism, let alone multicolor changes under different mechanical stimuli. In this study, SiO2 nanoparticles (NPs) are introduced into a rhodamine (Rh)-modified epoxy system to improve its mechanochromic response. When the nanocomposite is mechanically stimulated, concentrated stress around the heterogeneous interfaces induces massive ring-opening reactions of Rh in these areas, resulting in a vivid red color change. In addition, direct observation of the stress-concentration effect near the rigid particles is realized by using the visualization properties of the Rh moiety, and combined with finite element analysis to elucidate the enhancement mechanism of the mechanochromism. Furthermore, how the NPs affect multicolor mechanochromism of epoxy thermosets is also investigated. Nanocomposites with two different mechanochromophores exhibit stress- and time-dependent five-color variations due to the different activation of the Rh and disulfide moieties, whereas samples without NPs only show a triple-color change with lower contrast. This strategy is suitable for use in practical applications owning to its ability to display the stress intensity and stress history of a material through high-contrast multicolor switching. Several proof-of-concept scenarios are presented.

环氧树脂以其优异的综合性能在涂料和复合材料中得到了广泛的应用，但在应力传感和损伤检测方面也提出了新的挑战。机械变色，即材料在机械刺 激下可以改变颜色，可能是解决这一问题的潜在工具。然而，对机械变色聚合物的研究主要集中在弹性体和凝胶上。对于刚性环氧热固性树脂，目前仍难以实现明显的机械变色，更不用说在不同的机械刺 激下实现多色变化。在本研究中，二氧化硅纳米颗粒（NPs）被引入罗丹明（Rh）改性环氧树脂体系中，以改善其机械变色反应。当机械刺 激纳米复合材料时，非均质界面周围的集中应力在这些区域引起大量的Rh开环反应，导致鲜艳的红色变化。此外，利用Rh片段的可视化特性，实现了对刚性颗粒附近应力集中效应的直接观察，并结合有限元分析阐明了机械显色性的增强机理。此外，还研究了NPs对环氧热固性树脂的多色机械致色性的影响。具有两种不同机械发色团的纳米复合材料表现出应力和时间依赖的五色变化，这是由于Rh和二硫化物部分的不同活化，而没有NPs的样品只表现出三色变化，对比度较低。该策略适合于实际应用，因为它能够通过高对比度多色开关显示材料的应力强度和应力历史。介绍了几个概念验证场景。

A Unified Approach to the Effect of In-Plane Biaxial Loading on Delamination Progression in laminated Composite Structures

S.H. Taghavian, A.R. Ghasemi

doi:10.1016/j.compscitech.2025.111185

 

面内双轴载荷对层合复合材料结构分层进程影响的统一研究

This study presents a comprehensive numerical and experimental investigation of delamination progression in thin composite laminates subjected to in-plane biaxial tensile loading. Utilizing the full layerwise plate theory and an interface element approach, a dedicated computational framework was developed to simulate the growth behavior of delaminated regions. To experimentally validate the numerical predictions, a custom-designed biaxial loading frame was fabricated, enabling controlled biaxial tensile testing. Load-displacement curves were recorded, and delamination propagation was monitored using thermographic imaging for composite laminates with various stacking sequences. The numerical and experimental results demonstrate a strong dependence of delamination behavior on laminate geometric parameters. The findings highlight that delaminated regions of relatively large dimensions significantly affect the structural integrity of specimens under biaxial tensile loading. Moreover, the study reveals that the sensitivity of composites to delamination under biaxial tensile loading is considerably different from that observed in other loading scenarios, such as buckling.

本文对复合材料薄层板在平面内双向拉伸载荷作用下的分层过程进行了全面的数值和实验研究。利用全层板理论和界面元方法，开发了一个专门的计算框架来模拟分层区域的生长行为。为了实验验证数值预测，制作了定制设计的双轴加载框架，实现了可控的双轴拉伸测试。记录了复合材料层合板的载荷-位移曲线，并利用热成像技术监测了不同堆叠顺序复合材料层合板的分层扩展。数值和实验结果表明，层合材料的分层行为与层合材料的几何参数密切相关。研究结果表明，在双轴拉伸载荷下，相对大尺寸的分层区域显著影响试件的结构完整性。此外，研究表明，复合材料在双轴拉伸载荷下对分层的敏感性与在其他载荷情况下（如屈曲）观察到的敏感性有很大不同。