Composite Structures最新文献_第9页

Free vibration characteristics analysis of rotating composite fiber-reinforced honeycomb cylindrical shells with arbitrary boundary conditions 任意边界条件下旋转复合纤维增强蜂窝圆柱壳的自由振动特性分析

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

Composite Structures

Pub Date : 2025-12-23 DOI: 10.1016/j.compstruct.2025.119986

Peiyao Xu , Yao Yang , Hui Li , Zhuo Xu , Xiangping Wang , Qingkai Han , Bangchun Wen

To address the lack of research on the traveling wave vibration characteristics of rotating composite honeycomb sandwich cylindrical shells, this study proposes a semi-analytical model. The model is formulated based on the first-order shear deformation theory, the Ritz method, the domain decomposition method, and Jacobi orthogonal polynomials, aiming to predict both the natural frequencies and the forward and backward traveling wave frequencies under rotational conditions. The key model parameters are systematically determined through convergence analysis. The accuracy of the model is validated through comparisons with existing research cases and experimental test results. The results show that the model corresponds well with the results in the corresponding literature, and the maximum error between the model and the experimental results is 5.5 %. Furthermore, the effects of boundary stiffness loss and thickness ratio on the rotational traveling wave vibration frequencies, modal step regions, and critical rotational speeds are examined. The results show that the change of rotational speed will lead to complex frequency steering and modal shape exchange. In the high-order mode, the sensitivity of the frequency turning point to the boundary stiffness and speed decreases. In addition, properly increasing the thickness ratio of fiber layer can help to improve the structural stiffness.

针对旋转复合材料蜂窝夹层圆柱壳行波振动特性研究的不足，提出了一种半解析模型。该模型基于一阶剪切变形理论、Ritz方法、域分解方法和Jacobi正交多项式，旨在预测旋转条件下的固有频率和正反向行波频率。通过收敛分析，系统地确定了模型的关键参数。通过与已有研究案例和实验测试结果的对比，验证了模型的准确性。结果表明，该模型与相关文献的结果吻合较好，模型与实验结果的最大误差为5.5%。此外，还研究了边界刚度损失和厚度比对旋转行波振动频率、模态阶跃区域和临界转速的影响。结果表明，转速的改变会导致复频率转向和模态振型交换。在高阶模态下，频率拐点对边界刚度和速度的敏感性降低。此外，适当提高纤维层厚度比有助于提高结构刚度。

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引用次数: 0

A rapid geometry reconstruction method for automated dry fibre placement (ADFP) preforms using real-time manufacturing data 一种基于实时制造数据的自动干纤维铺放（ADFP）预制件快速几何重构方法

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

Composite Structures

Pub Date : 2025-12-23 DOI: 10.1016/j.compstruct.2025.120009

Shimin Lu, Jesús Molinar-Díaz, Andrew Parsons, Lee Harper, Thomas Turner

This paper introduces a rapid geometry reconstruction technique designed to capture variability in real time during Automated Dry Fibre Placement (ADFP). The approach supports enhanced quality control, facilitates downstream process and structural modelling, and enables the creation of a digital product passport for in-service monitoring and proactive maintenance. By integrating laser scanning and machine motion data collected during fibre deposition, the method generates detailed computer-aided design (CAD) models with solid representations of individual tapes.

Demonstration panels are produced using a laboratory-scale ADFP machine and subsequently infused with liquid resin. The accuracy of the reconstructed geometries was validated through optical microscopy, revealing tape width measurement errors within 2.5 %. Positional and angular deviations of the deposited tapes were constrained to ±1 mm and ±2°, respectively. These deviations were predominantly concentrated within the initial ∼180 mm of each course, attributed to insufficient tape tension at the onset of deposition.

In-plane shear testing reveals a direct correlation between the digitally identified gaps and overlaps and the localised strain variations measured via digital image correlation. Although these defects have minimal impact on the in-plane shear modulus, they are shown to significantly influence premature failure and reduce the ultimate shear strength of the composite. Notably, gaps of up to 5 mm in width were observed, corresponding to a decrease in ultimate strength of up to 13 %.

本文介绍了一种快速几何重建技术，旨在实时捕获自动干纤维放置（ADFP）过程中的变化。该方法支持增强的质量控制，促进下游工艺和结构建模，并能够创建用于在役监测和主动维护的数字产品通行证。通过整合激光扫描和在纤维沉积过程中收集的机器运动数据，该方法生成详细的计算机辅助设计（CAD）模型，其中包含单个磁带的实体表示。演示板是使用实验室规模的ADFP机器制作的，随后注入液体树脂。通过光学显微镜验证了重建几何形状的准确性，显示带宽度测量误差在2.5%以内。沉积带的位置和角度偏差分别被限制在±1 mm和±2°。这些偏差主要集中在每个过程的初始~ 180 mm内，归因于沉积开始时胶带张力不足。平面内剪切测试揭示了数字识别的间隙和重叠与通过数字图像相关测量的局部应变变化之间的直接相关性。虽然这些缺陷对面内剪切模量的影响很小，但它们会显著影响复合材料的过早破坏和降低其极限抗剪强度。值得注意的是，观察到宽度达5毫米的间隙，相应的极限强度下降高达13%。

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引用次数: 0

A Machine Learning-Embedded theoretical model for precise adhesive layer stress prediction in composite bonded joints 基于机器学习的复合材料粘接接头粘接层应力精确预测理论模型

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

Composite Structures

Pub Date : 2025-12-23 DOI: 10.1016/j.compstruct.2025.119988

Yalong Liu , Zewen Gu , Xiaoxuan Ding , Wen Guo , Jianlin Liu , Xiaonan Hou

Adhesive-bonded joints are widely used in engineering applications ranging from aerospace, automobile to advanced superconducting materials due to their ability to effectively join dissimilar materials. While extensive research has investigated the factors influencing their failure modes, particularly stresses within the adhesive layer, accurate stress prediction remains challenging for joints with arbitrary geometries. This difficulty arises primarily from the complex effects of eccentric loading across varying material combinations and joint configurations. This study proposed an integrated approach combining experimental testing, numerical simulation, and machine learning to predict normal and shear stresses in single-lap joints. First, tensile tests are performed on multi-material joints (Al-Al, CFRP-CFRP, and Al-CFRP) to validate the developed finite element models. Then, theoretical models are derived for asymmetric joint configurations. For including the effects of eccentric loading, a dataset of 300 simulation results is generated to train a deep neural network (DNN) model for predicting the bending moment factors (K factors) across diverse joint geometries and material pairings. The DNN-derived K factors demonstrate exceptional accuracy when integrated into theoretical stress predictions, significantly outperforming conventional methods while maintaining robust adaptability. This work addresses a key joint mechanics challenge and offers a versatile framework for optimizing adhesive joint design in engineering.

胶粘剂连接由于其能够有效地连接不同材料而广泛应用于从航空航天、汽车到先进超导材料的工程应用中。虽然大量的研究已经调查了影响其破坏模式的因素，特别是粘接层内的应力，但对于任意几何形状的接头来说，准确的应力预测仍然是一项挑战。这种困难主要是由于偏心载荷对不同材料组合和接头结构的复杂影响。本研究提出了一种结合实验测试、数值模拟和机器学习的综合方法来预测单搭接节点的法向应力和剪应力。首先，对多材料接头（Al-Al、CFRP-CFRP和Al-CFRP）进行拉伸试验，以验证所开发的有限元模型。在此基础上，建立了非对称节理的理论模型。为了包括偏心加载的影响，生成了300个模拟结果的数据集，以训练一个深度神经网络（DNN）模型，用于预测不同接缝几何形状和材料对的弯矩因子（K因子）。dnn衍生的K因子在整合到理论应力预测中时显示出卓越的准确性，在保持强大适应性的同时显着优于传统方法。这项工作解决了一个关键的关节力学挑战，并为优化工程中的粘接设计提供了一个通用的框架。

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引用次数: 0

A novel phase-field model for fatigue failure in functionally graded materials under thermo-mechanical loading 热机械载荷作用下功能梯度材料疲劳失效的相场模型

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

Composite Structures

Pub Date : 2025-12-23 DOI: 10.1016/j.compstruct.2025.120003

Ayyappan Unnikrishna Pillai, Mohammad Masiur Rahaman

This article presents a novel phase-field model (PFM) for predicting fatigue failure in functionally graded materials (FGMs) under non-isothermal conditions. The proposed model is the first PFM for analyzing fatigue in FGMs under coupled thermo-mechanical loading. Moreover, it establishes a phase-field length scale-insensitive formulation for thermo-mechanical fatigue in brittle materials. The governing equations and constitutive relations are derived within a thermodynamically consistent framework. The model is validated using both homogeneous and functionally graded specimens under mechanical loading as a special case. To investigate the effect of temperature boundary conditions and material gradation on the fatigue response, comprehensive parametric studies are performed. The representative numerical examples demonstrate that both the gradation parameter and the spatial arrangement of constituent materials significantly affect the fatigue life of FGMs. The results also confirm the predictive capability of the proposed model in accurately capturing the complex interplay between thermal and mechanical effects in fatigue processes. The numerical results show the effectiveness and versatility of the proposed model. The model consistently yields predictions that are insensitive to the phase-field length scale. The proposed model is numerically implemented using Gridap, an open-source finite element package in Julia. This promotes reproducibility and further research in this area.

提出了一种预测非等温条件下功能梯度材料疲劳失效的相场模型（PFM）。该模型是第一个用于分析热-机械耦合载荷下fgm疲劳的PFM模型。建立了脆性材料热机械疲劳的相场长度尺度不敏感公式。在热力学一致的框架内推导了控制方程和本构关系。该模型在机械载荷下以均质和功能分级试样为例进行了验证。为了研究温度边界条件和材料级配对疲劳响应的影响，进行了全面的参数研究。具有代表性的数值算例表明，级配参数和组成材料的空间排列对fgm的疲劳寿命有显著影响。结果还证实了所提出的模型在准确捕捉疲劳过程中热效应和力学效应之间复杂相互作用方面的预测能力。数值结果表明了该模型的有效性和通用性。该模型始终产生对相场长度尺度不敏感的预测。所提出的模型使用Gridap （Julia中的开源有限元包）进行了数值实现。这促进了该领域的可重复性和进一步研究。

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引用次数: 0

Quantifying freeze-thaw resistance of fiber-reinforced stabilized loess with electromechanical impedance-based energy dissipation indicators 基于机电阻抗的能量耗散指标量化纤维增强稳定黄土的冻融阻力

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

Composite Structures

Pub Date : 2025-12-22 DOI: 10.1016/j.compstruct.2025.119993

Jianguo Ma , Qunfeng Liu , Hongde Li , Xing Wu , Xiang Ren

This study proposed a novel framework for quantifying the freeze–thaw resistance of loess, cement-stabilized loess (CSL), and polypropylene fiber-reinforced CSL (PF-CSL) using energy-based indicators derived from electromechanical impedance (EMI) techniques with disk-shaped (DS) sensors. The efficacy of the EMI method was validated by tracking shifts in the primary resonance peak of conductance signatures, which directly correspond to cycle-induced changes in the material’s strength (frequency shift) and damping characteristics (amplitude shift). To enhance quantitative assessment, the Root Mean Square Deviation (RMSD) was employed as a robust statistical indicator to characterize the hysteresis observed during each cycle, establishing a strong correlation between the material’s cyclic damping capacity and its freeze–thaw resistance. Building on this, two slope indicators (i₁ and i₂) derived from the cumulative energy dissipation ratios (ΣE_RMSD) were proposed to decouple and quantify distinct energy dissipation mechanisms: initial damage from yielding in early cycles and the steady-state damping that governs durability in later cycles. Experimental results indicate that the 1.0% PF-CSL composite exhibits superior freeze–thaw resistance, evidenced by minimal stiffness variation and the highest damping-driven energy dissipation. Overall, this study validates that the proposed EMI-based energy dissipation indicators provide a quantitative framework for evaluating the multi-cycle freeze–thaw performance of CSL composites.

本研究提出了一种新的框架来量化黄土、水泥稳定黄土（CSL）和聚丙烯纤维增强黄土（PF-CSL）的冻融阻力，该框架使用基于能量的指标，这些指标来自于带有圆盘形（DS）传感器的机电阻抗（EMI）技术。通过跟踪电导特征的主共振峰的位移，验证了电磁干扰方法的有效性，这直接对应于周期引起的材料强度（频移）和阻尼特性（幅移）的变化。为了加强定量评估，采用均方根偏差（RMSD）作为稳健的统计指标来表征每个循环过程中观察到的滞后，建立了材料的循环阻尼能力与其抗冻融能力之间的强相关性。在此基础上，提出了从累积能量耗散比（ΣERMSD）导出的两个斜率指标（i1和i2），以解耦和量化不同的能量耗散机制：早期循环中屈服的初始损伤和后期循环中控制耐久性的稳态阻尼。试验结果表明，1.0% PF-CSL复合材料具有较好的抗冻融性能，刚度变化最小，阻尼能量耗散最大。总体而言，本研究验证了所提出的基于emi的能量耗散指标为评价CSL复合材料的多循环冻融性能提供了一个定量框架。

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引用次数: 0

A competitive peridynamic model on oxygen diffusion–reaction process in mechano-oxygenic coupling failures of C/SiC composites C/SiC复合材料机械-氧耦合失效中氧扩散-反应过程的竞争动力学模型

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

Composite Structures

Pub Date : 2025-12-22 DOI: 10.1016/j.compstruct.2025.119990

Han WANG , Jinzhao HUANG , Siyuan CHEN , Kai HUANG , Licheng GUO

Matrix cracks, serving as oxygen diffusion channels, are inevitable in Carbon/Silicon Carbide (C/SiC) ceramic matrix composites (CMCs). These cracks accelerate the oxidation of carbon reinforcements, significantly degrading the material’s mechanical performance under mechano-oxygenic coupling conditions. Applicable for addressing discontinuous mechanical problems induced by crack and oxidation, a peridynamic model on mechano-oxygenic coupling failures of CMCs is proposed. Notably, the competition between oxygen diffusion and reaction is incorporated, providing a unified description of the oxidation process governed by varying kinetics. Furthermore, a peridynamic simulation framework is established enabling simultaneous mechanical and oxidation analysis numerically. Model validation is performed via the proposed framework, including oxidation kinetics and mechano-oxygenic coupling responses. The model captures the linear recession process controlled by reaction and the parabolic recession process governed by diffusion under varying conditions. Additionally, the model successfully predicts the stress-oxidation behaviors of CMCs, with predictions corroborated by experimental data in terms of oxidation morphologies and mechanical degradation trends. Compared to existing simulation approaches, the proposed method, enabling both 2D and 3D analysis, offers more intuitive insights into the mechano-oxygenic coupling failure process. That will enhance the understanding of CMCs’ failure mechanisms and provide a promising tool for evaluating their mechanical performance in extreme environments.

基体裂纹是碳/碳化硅（C/SiC）陶瓷基复合材料中不可避免的氧扩散通道。这些裂纹加速了碳增强材料的氧化，在机械-氧耦合条件下显著降低了材料的力学性能。针对裂纹和氧化引起的不连续力学问题，提出了cmc力学-氧耦合失效的全动力学模型。值得注意的是，氧气扩散和反应之间的竞争被纳入，提供了由不同动力学控制的氧化过程的统一描述。此外，建立了能同时进行力学和氧化分析的周动力模拟框架。通过提出的框架进行模型验证，包括氧化动力学和机械-氧耦合响应。该模型在不同条件下捕捉到由反应控制的线性衰退过程和由扩散控制的抛物线型衰退过程。此外，该模型成功地预测了cmc的应力氧化行为，并在氧化形态和机械降解趋势方面得到了实验数据的证实。与现有的模拟方法相比，该方法支持2D和3D分析，可以更直观地了解机械-氧耦合失效过程。这将增强对cmc失效机制的理解，并为评估其在极端环境下的机械性能提供一个有前途的工具。

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引用次数: 0

Thermal-mechanical design of hybrid solid-lattice structures using multi-material topology optimization 基于多材料拓扑优化的混合固体-晶格结构热-力学设计

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

Composite Structures

Pub Date : 2025-12-22 DOI: 10.1016/j.compstruct.2025.119998

Yedan Li, Zhen Liu, Yuhan Liu, Liang Xia

This work extends our recently proposed design approach for hybrid solid-lattice structures to account for coupled thermal–mechanical loads. The conventional recursively defined multi-material interpolation model has been extended to describe both solid and gradient lattice materials. The extended model incorporates gradient control variables, treating the secondary “solid” material phase as a type of parameterized lattice. By means of numerical homogenization and interpolation, the effective mechanical and thermal behaviors of gradient lattices are explicitly expressed in terms of the gradient control variables, respectively. The extended design approach maintains the flexibility of customizing the variable range of gradient variables. Furthermore, a unified global volume constraint is incorporated in the thermal–mechanical scenario, resulting in the autonomous adjustment of material distribution between solid and lattice material phases. A series of benchmark design tests using two types of lattice materials validate the effectiveness of multi-material interpolation models that incorporate gradient material phases in thermal–mechanical design, ensuring the physical validity of intermediate-density regions and enhancing the manufacturability of the overall structure.

这项工作扩展了我们最近提出的混合固体-晶格结构的设计方法，以考虑耦合的热-机械载荷。将传统递归定义的多材料插值模型扩展到固体材料和梯度晶格材料。扩展模型结合梯度控制变量，将二次“固体”材料相作为一种参数化晶格。通过数值均匀化和插值方法，分别用梯度控制变量明确表示梯度格的有效力学行为和热行为。扩展设计方法保持了自定义梯度变量范围的灵活性。此外，在热力学场景中加入了统一的全局体积约束，从而在固体和晶格材料相之间自主调整材料分布。采用两种晶格材料进行了一系列基准设计试验，验证了将梯度材料相纳入热机械设计的多材料插值模型的有效性，保证了中密度区域的物理有效性，提高了整体结构的可制造性。

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引用次数: 0

Effects of curing temperature and CFRP/Invar bases on the surface figure of adhesive-bonded mirrors 固化温度和CFRP/Invar基材对粘接镜表面形貌的影响

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

Composite Structures

Pub Date : 2025-12-22 DOI: 10.1016/j.compstruct.2025.119996

Xiumin Zhang , Yuxi Zhao , Jianhua Liu , Huanxiong Xia , Xiaohui Ao

Adhesive bonding technology is widely used to join optical mirrors and their supporting components in precision optomechanical products. However, the curing stresses of optical adhesives often cause mirror distortion, which in turn degrades optical precision. This paper presents a method for analyzing the curing stresses and improving the surface accuracy of a bonded mirror. The approach employs a comprehensive finite-element model that integrates a cure kinetics equation, calibrated with differential scanning calorimetry (DSC) data, and a viscoelastic material model for the adhesive. The viscoelastic model is enhanced through nonlinear time–temperature/degree of cure (DOC) superposition principles, which are determined by stress relaxation tests at varying DOCs and temperatures. The gel point and effective chemical shrinkage strain of the adhesive are quantified using a fiber Bragg grating (FBG) technique. The model is validated experimentally using a bonded planar mirror, elucidating the evolution of surface figure with DOC and temperature. The influences of base materials (carbon fibre-reinforced polymer (CFRP) and Invar) and bonding structure on surface distortion were further examined, and an optimized design for the CFRP base was proposed.

在精密光学机械产品中，粘接技术被广泛应用于光学反射镜及其支撑部件的连接。然而，光学胶粘剂的固化应力经常引起镜面变形，从而降低光学精度。本文提出了一种分析粘接镜固化应力和提高表面精度的方法。该方法采用了一个综合的有限元模型，该模型集成了固化动力学方程（用差示扫描量热法（DSC）数据校准）和粘合剂的粘弹性材料模型。粘弹性模型通过非线性时间-温度/固化度（DOC）叠加原理得到增强，该原理由不同DOC和温度下的应力松弛试验确定。利用光纤布拉格光栅（FBG）技术对胶粘剂的凝胶点和有效化学收缩应变进行了量化。利用键合平面反射镜对模型进行了实验验证，揭示了表面形貌随温度和温度的变化规律。进一步研究了基材（碳纤维增强聚合物（CFRP）和Invar）以及键合结构对表面畸变的影响，提出了CFRP基材的优化设计方案。

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引用次数: 0

Multi-physics modeling for fatigue strength degradation of fiber-reinforced polymer composites under hygrothermal conditions 湿热条件下纤维增强聚合物复合材料疲劳强度退化的多物理场建模

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

Composite Structures

Pub Date : 2025-12-22 DOI: 10.1016/j.compstruct.2025.119992

Ying Li , Zhipeng Mai , Zhouyi Ju , Biaoxian Cao , Yi Lin , Qian Deng , Pan Dong , Weiguo Li

With the rapid development of aerospace technology, fiber-reinforced polymer (FRP) composites are increasingly used in high-temperature and high-humidity environments. As fatigue resistance is a critical indicator of material durability, the fatigue performance of FRP composites under varying temperature and humidity conditions has become a key research focus. In this study, the failure mechanism of FRP composites under different temperatures and humidity conditions is investigated, and a multi-physics theoretical model is originally developed for predicting the fatigue strength of FRP composites under hygrothermal conditions. The proposed temperature and humidity dependent fatigue strength (THDFS) model can quantitatively consider the combined effects of temperature, moisture absorption, hygroscopic plasticization and progressive damage on the fatigue strength of FRP composites under hygrothermal conditions. The reasonability and practicality of the model is demonstrated by comparing the model predictions with the available experimental data. Furthermore, compared with the classical model, the THDFS model has no fitting parameters and can conduct more accurate predictions. This study provides a reasonable and convenient theoretical method for predicting the THDFS of FRP composites. Meanwhile, this work also supplies significant insights for material evaluation and composite reinforcement under hygrothermal conditions.

随着航空航天技术的飞速发展，纤维增强聚合物（FRP）复合材料在高温高湿环境中的应用越来越广泛。由于抗疲劳性能是材料耐久性的重要指标，FRP复合材料在变温变湿条件下的疲劳性能已成为研究热点。本研究研究了不同温度和湿度条件下FRP复合材料的失效机理，并初步建立了一个多物理场理论模型来预测FRP复合材料在湿热条件下的疲劳强度。提出的温湿相关疲劳强度（THDFS）模型可以定量考虑湿热条件下温度、吸湿、吸湿塑化和渐进损伤对FRP复合材料疲劳强度的综合影响。通过与现有实验数据的比较，验证了模型的合理性和实用性。此外，与经典模型相比，THDFS模型没有拟合参数，可以进行更准确的预测。本研究为预测FRP复合材料的THDFS提供了一种合理、便捷的理论方法。同时，该工作也为材料评价和复合材料在湿热条件下的增强提供了重要的见解。

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引用次数: 0

Progressive static failure prediction of short fibre reinforced epoxy adhesive material: A combined experimental and numerical approach 短纤维增强环氧胶粘剂材料的渐进静态破坏预测：实验与数值相结合的方法

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

Composite Structures

Pub Date : 2025-12-22 DOI: 10.1016/j.compstruct.2025.119959

M. Hematipour , A. Dean , M. Tariq , S. Scheffler , R. Rolfes

Structural adhesives are essential in various applications, particularly in the wind energy industry, where rotor blade components are joined using adhesives. Cracks in the bonding line of rotor blades indicate gaps in design and analysis knowledge. To address this, adhesives made of high-viscosity epoxy polymers reinforced with short fibres have been developed to meet industry requirements. The mechanical performance of these short fibre-reinforced polymer (SFRP) adhesives is highly dependent on the orientation distribution of the fibres within the adhesive matrix. This work presents a novel model that integrates 3D Hashin’s failure criteria with the anisotropic and non-linear behaviour of SFRPs. While traditional models typically focus on linear material behaviour or simplified failure criteria, this approach uniquely captures both the fibre and matrix failure modes, while accurately reflecting the complex, anisotropic nature and non-linear response of SFRPs. By incorporating these factors, the model enhances the prediction of failure under various loading conditions, offering a more reliable tool for analysing SFRPs in composite structures. This advancement provides a significant step towards improving the design and performance of SFRP adhesives in engineering applications.

结构粘合剂在各种应用中是必不可少的，特别是在风能行业，其中转子叶片部件使用粘合剂连接。转子叶片粘接线上的裂纹表明设计和分析知识的空白。为了解决这个问题，用短纤维增强的高粘度环氧聚合物制成的粘合剂已经开发出来，以满足工业要求。这些短纤维增强聚合物（SFRP）胶粘剂的机械性能高度依赖于胶粘剂基体中纤维的取向分布。这项工作提出了一个新的模型，该模型将3D哈辛破坏准则与SFRPs的各向异性和非线性行为相结合。传统模型通常关注线性材料行为或简化的失效标准，而这种方法独特地捕获了纤维和基体的失效模式，同时准确地反映了SFRPs的复杂性、各向异性和非线性响应。通过结合这些因素，该模型增强了对各种荷载条件下破坏的预测，为分析复合材料结构的sfrp提供了更可靠的工具。这一进展为改进SFRP胶粘剂在工程应用中的设计和性能提供了重要的一步。

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引用次数: 0