Composite Structures最新文献_第4页

Design and mechanical characterization of novel triply periodic minimal surface-based lattice structures with high strength and energy absorption 具有高强度和能量吸收的新型三周期最小表面基晶格结构的设计和力学特性

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

Composite Structures

Pub Date : 2026-01-14 DOI: 10.1016/j.compstruct.2026.120062

Xiaokai Yin, Hongyu Cui, Haoming Hu, Huanqiu Xu, Tiange Yang

Lightweight lattice structures have become optimal candidates for structural load-bearing and energy-absorbing applications, owing to their high specific strength and superior energy absorption. Nevertheless, conventional stretch-dominated and bending-dominated lattice structures inherently trade off mechanical properties for deformation stability. Recent advancements highlight the exceptional mechanical properties of triply periodic minimal surface (TPMS)-based lattice structures, attributable to their distinctive topological configurations. This research introduces a novel skeletal lattice (NSL) based on TPMS topology to address the performance deficiencies of traditional lattices. Samples were fabricated via selective laser melting (SLM) technology, and their stress–strain responses and deformation characteristics were analyzed through quasi-static compression tests. Coupling experimental results with finite element modeling enabled a comprehensive assessment of the lattice’s compressive mechanical behavior, elucidating its deformation mechanisms. Findings reveal NSL significantly outperforms conventional lattices in specific energy absorption, specific strength, and crushing load efficiency—improving 573.2 %, 305.7 %, and 33.9 % over body-centered cubic (BCC), and 221.3 %, 7.2 %, and 157.0 % relative to Octet. This structural innovation successfully mitigates the inherent performance trade-offs of traditional lattice designs, realizing concurrent enhancements in mechanical strength, energy absorption, and deformation stability. The proposed NSL structure demonstrates broad applicability within engineering domains, including lightweight load-bearing components and high-performance energy-absorbing materials.

轻质点阵结构由于其高比强度和优越的吸能性能，已成为结构承载和吸能应用的最佳候选者。然而，传统的拉伸主导和弯曲主导的晶格结构固有地权衡变形稳定性的力学性能。最近的进展突出了基于三周期最小表面（TPMS）的晶格结构的特殊力学性能，这归因于它们独特的拓扑结构。针对传统晶格的性能不足，提出了一种基于TPMS拓扑结构的新型骨架晶格（NSL）。采用选择性激光熔化（SLM）技术制备试样，通过准静态压缩试验分析试样的应力应变响应和变形特性。将实验结果与有限元建模相结合，可以全面评估晶格的压缩力学行为，阐明其变形机制。研究结果表明，NSL在比能量吸收、比强度和破碎载荷效率方面明显优于传统的格子——比体心立方（BCC）提高573.2%、305.7%和33.9%，比八柱体（Octet）提高221.3%、7.2%和157.0%。这种结构创新成功地减轻了传统晶格设计固有的性能权衡，实现了机械强度、能量吸收和变形稳定性的同时增强。提出的NSL结构在工程领域具有广泛的适用性，包括轻质承重部件和高性能吸能材料。

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引用次数: 0

Multi-objective optimization of curing process for thick-section thermosetting composites 厚截面热固性复合材料固化工艺的多目标优化

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

Composite Structures

Pub Date : 2026-01-14 DOI: 10.1016/j.compstruct.2026.120067

Wenjie Liu , Xin Fu , Yukun Li , Ning Guo , Mi Xu , Anxin Ding

To mitigate excessive peak temperatures, enhance cure uniformity, and reduce curing time for AS4/8552 composite laminates with different thicknesses, this study proposes a multi-objective curing process optimization framework. The methodology integrates high-fidelity finite element thermo-chemical simulations with a surrogate-assisted approach, coupling Gaussian process regression (trained on automated finite element datasets) and the non-dominated sorting genetic algorithm II. Global sensitivity analysis further identifies critical process parameters. The results reveal a pronounced non-linear relationship between process parameters and thermal response, amplified by the increased thickness. Furthermore, effective mitigation of temperature overshoot requires increasing first stage hold temperatures while reducing second stage heating rate, despite optimal parameters being thickness-dependent. Compared to the manufacturer’s recommended cure cycle, the optimized cure cycle achieves notable improvements for 12 mm, 18 mm, and 24 mm thick laminates. Curing time is reduced by 9.4%, 17.3%, and 17.7%, respectively, with concurrent decreases in peak temperature of 6.4%, 9.3%, and 10.5%. The maximum differences in degree of cure are also reduced by 53.8%, 54.5%, and 72.6% for the corresponding thicknesses, demonstrating enhanced process uniformity.

为了减少不同厚度AS4/8552复合材料层合板的峰值温度过高，提高固化均匀性，缩短固化时间，本研究提出了一种多目标固化工艺优化框架。该方法将高保真有限元热化学模拟与代理辅助方法相结合，耦合高斯过程回归（在自动化有限元数据集上训练）和非主导排序遗传算法II。全局敏感性分析进一步确定关键工艺参数。结果表明，工艺参数和热响应之间存在明显的非线性关系，随着厚度的增加，这种关系被放大。此外，尽管最佳参数与厚度有关，但有效缓解温度超调需要提高第一级保温温度，同时降低第二级加热速率。与制造商推荐的固化周期相比，优化的固化周期对12mm， 18mm和24mm厚的层压板实现了显着改善。固化时间分别缩短了9.4%、17.3%和17.7%，峰值温度同时降低了6.4%、9.3%和10.5%。在相应厚度下，固化程度的最大差异也分别减少了53.8%、54.5%和72.6%，表明工艺均匀性增强。

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引用次数: 0

Hyperelastic second gradient decoupled homogenization for fiber-reinforced layers with high stiffness contrast 高刚度对比纤维增强层的超弹性二次梯度解耦均匀化

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

Composite Structures

Pub Date : 2026-01-14 DOI: 10.1016/j.compstruct.2026.120070

A. Gamra , K. Mansouri , Y. Renard , M. Arfaoui , T. Homolle , C. Douanla-Lontsi

The main objective of this paper is to develop computationally efficient homogenization methods for fiber-reinforced materials in the nonlinear regime of large deformations, with the aim of handling the highest possible stiffness contrast between the fibers and the matrix. We demonstrate that, in the presence of high contrast, a second-gradient approach is necessary to accurately capture key features of the homogenized material, such as bending stiffness. This higher-order modeling is implemented within a decoupled framework in order to keep computational costs manageable—unlike more tightly coupled strategies that can become prohibitive. We also highlight specific challenges related to the buckling behavior of homogenized fiber layers, which are more pronounced in first-order homogenization than in second-gradient models. Finally, numerical tests show that the second-gradient strategy offers reliable modeling over an indeed broader range of stiffness contrasts compared to first-order approaches.

本文的主要目的是开发计算效率高的纤维增强材料在非线性大变形下的均匀化方法，目的是处理纤维和基体之间尽可能高的刚度对比。我们证明，在高对比度的情况下，二次梯度方法对于准确捕获均匀化材料的关键特征（如弯曲刚度）是必要的。这种高阶建模是在解耦框架中实现的，目的是保持计算成本可管理，而不像紧耦合策略那样可能会变得令人望而却步。我们还强调了与均匀化纤维层的屈曲行为相关的具体挑战，这在一阶均匀化模型中比在二阶梯度模型中更为明显。最后，数值试验表明，与一阶方法相比，二阶梯度策略在更广泛的刚度对比范围内提供了可靠的建模。

引用次数: 0

Hyperelastic anisotropic effective strain gradient models based on large strains homogenization and applications to architected materials 基于大应变均匀化的超弹性各向异性有效应变梯度模型及其在建筑材料中的应用

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

Composite Structures

Pub Date : 2026-01-12 DOI: 10.1016/j.compstruct.2025.119941

Ahmed Lahbazi, Adrien Baldit, Jean-François Ganghoffer

Higher gradient nonlinear models capturing size effects are elaborated for soft composites and architected media. A two-scale homogenization method is established to identify the nonlinear response of the underlying periodic microstructure, in the framework of strain gradient mechanics. The response of the base material is supposed to obey isotropic nonlinear elasticity. The anisotropy of the microstructure is captured by structural tensors reflecting its material symmetry group. A set of kinematic invariants of the macroscopic energy density is derived as the components of the Cauchy–Green first and second gradient tensors in the basis of the principal directions of anisotropy, proving to be invariant under the action of the material symmetry group, and accounting for rotations, reflections and permutations of the principal directions of anisotropy. The developed hyperelastic formulation is validated thanks to both full-field FE simulations and comparison with measurements done over pantographic structures exhibiting pronounced strain gradient effects. We exemplify the proposed homogenization method with different 2D microstructures and demonstrate the predictive capacity of the identified anisotropic hyperelastic model.

针对软复合材料和结构介质，提出了捕捉尺寸效应的高梯度非线性模型。在应变梯度力学的框架下，建立了一种双尺度均匀化方法来识别下垫层周期性微观结构的非线性响应。假定基材的响应服从各向同性非线性弹性。微观结构的各向异性由反映其材料对称群的结构张量捕获。在各向异性主方向的基础上，导出了一组宏观能量密度的运动不变量，作为Cauchy-Green第一和第二梯度张量的分量，证明了在材料对称群的作用下是不变量，并考虑了各向异性主方向的旋转、反射和置换。开发的超弹性公式得到了验证，这要归功于全场有限元模拟和与具有明显应变梯度效应的受电弓结构的测量结果的比较。我们以不同的二维微观结构为例，验证了所识别的各向异性超弹性模型的预测能力。

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引用次数: 0

Vibration characteristics of composite support structures with complex cutouts based on image recognition technique 基于图像识别技术的复杂切口复合支撑结构振动特性研究

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

Composite Structures

Pub Date : 2026-01-12 DOI: 10.1016/j.compstruct.2026.120047

Yang Li, Zhi-Jian Wang, Yu-Hang Ke, Jian Zang, Ye-Wei Zhang

Driven by the demand for lightweight design in aerospace composite structures, this study proposes an image recognition technique (IRT) to analyze the vibration behavior of aircraft composite support structures (ACSS) containing irregularly shaped cutouts. The image recognition technology accurately extracts the shape, dimensions and quantity of cutout from photographs of the support structure. Moreover, compared to traditional methods, IRT does not require specific formulas or equations to solve for the cutouts. By combining IRT with the Rayleigh-Ritz method, a dynamic model for aircraft composite support structures with complex cutouts is established. Numerical results analysis and modal validation through finite element analysis and modal experiments confirmed the model’s accuracy. Furthermore, the study investigates the effects of varying notch shapes, quantities, and sizes on the vibration characteristics of composite combined structures. This technology provides a rapid, non-contact tool for designing and optimizing perforated composite components in aerospace applications.

在航空复合材料结构轻量化设计需求的驱动下，本研究提出了一种图像识别技术（IRT）来分析含有不规则形状切口的飞机复合材料支撑结构（ACSS）的振动行为。图像识别技术可以准确地从支撑结构的照片中提取出切口的形状、尺寸和数量。此外，与传统方法相比，IRT不需要特定的公式或方程来求解切割点。将IRT法与Rayleigh-Ritz法相结合，建立了具有复杂切口的飞机复合材料支撑结构的动力学模型。数值结果分析以及通过有限元分析和模态试验进行的模态验证证实了模型的准确性。此外，研究了不同缺口形状、数量和尺寸对复合材料组合结构振动特性的影响。该技术为航空航天应用中穿孔复合材料部件的设计和优化提供了一种快速、非接触式的工具。

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引用次数: 0

Uncertainty quantification of the stiffness and strength of particle-reinforced composites accelerated by a machine-learning-based homogenisation method 基于机器学习的均匀化方法加速颗粒增强复合材料刚度和强度的不确定性量化

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

Composite Structures

Pub Date : 2026-01-12 DOI: 10.1016/j.compstruct.2026.120052

Chuang Ma , Yichao Zhu

This article proposes an efficient scheme for stiffness and strength uncertainty quantification of three-dimensional linearly elastic particle-reinforced composites (PRCs). The stochastic particle distribution within a representative volume element (RVE) is described with a randomly perturbed mesoscale mapping function. Such a way of uncertainty quantification, with the used of a machine learning based reiterated asymptotic homogenisation and localisation method, enables fast evaluation of the RVE mechanical behaviour. It is shown that it takes a laptop computer 26 min to output the maximum von Mises values of 8000 stochastic RVE. Equipped with such a high-efficiency method, one may (a) quickly analyse the ranges of RVE stiffness and strength against the RVE stochastic measure; (b) quickly determine the probability of failure initiation in an RVE bearing a certain volume fraction under any macroscopic applied strain. Moreover, a well-trained neural networks for a given set of material selection can be quickly prepared for other constituting materials with the use of the transfer learning technique.

本文提出了一种有效的三维线弹性颗粒增强复合材料刚度和强度不确定性量化方案。用随机摄动中尺度映射函数描述了代表性体积元（RVE）内的随机粒子分布。这种不确定性量化方法使用基于机器学习的重复渐近均匀化和定位方法，可以快速评估RVE力学行为。结果表明，一台笔记本电脑需要26min才能输出8000随机RVE的最大von Mises值。采用这种高效率的方法，可以(a)根据RVE随机测量快速分析RVE刚度和强度的范围；(b)在任意宏观外加应变下，快速确定承载一定体积分数的RVE发生破坏的概率。此外，对于给定的一组材料选择，训练良好的神经网络可以使用迁移学习技术快速准备其他构成材料。

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引用次数: 0

Novel 3D semi-analytical formulation via SBFEM for thermal stress and buckling analyses of laminated plates with 2D discretization 基于SBFEM的层合板二维离散热应力和屈曲分析新三维半解析公式

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

Composite Structures

Pub Date : 2026-01-10 DOI: 10.1016/j.compstruct.2026.120055

Wenbin Ye , Lei Gan , Jun Liu , Peiqing Wang , Chenxi Ji , Liang Chen , Haibo Wang , Xinwei Song

In this paper, a novel three-dimensional (3D) semi-analytical formulation for the thermal stress and buckling analyses of laminated plates subjected to complex thermal loading is proposed, utilizing the scaled boundary finite element method (SBFEM). Based on 3D thermoelasticity theory, precise physical modeling is conducted for individual layers of laminated plate structures. This approach eliminates the inherent kinematic assumptions of classical laminated plate theories, thereby ensuring the numerical results’ stability and computational accuracy, and effectively overcoming the limitations of equivalent single-layer theories in predicting transverse deformations and interlaminar stresses. Within the SBFEM framework, inhomogeneous constant-coefficient ordinary differential equations for the thermal stress and buckling analyses of laminated plates, as well as an innovative solution procedure based on the precise integration method (PIM), are established. The proposed model only requires two-dimensional discretization of the structural surfaces, reducing the total degrees of freedom (DOFs) of the model. The thickness direction of the structure is analytically solved using the PIM, which effectively guarantees the stability, accuracy, and efficiency of numerical computations. This model features simple formulations, straightforward derivation of the governing equations, and ease of programming implementation. Numerical results demonstrate its advantages, including a fast convergence rate, strong numerical robustness, high computational accuracy, and wide applicability, thereby providing a novel approach for the accurate solution of thermoelastic problems in laminated plate structures.

本文利用尺度边界有限元法（SBFEM），提出了复合材料板在复杂热载荷作用下的热应力和屈曲分析的三维半解析公式。基于三维热弹性理论，对层合板结构的各层进行了精确的物理建模。该方法消除了经典层合板理论固有的运动学假设，保证了数值结果的稳定性和计算精度，有效克服了等效单层理论在预测横向变形和层间应力方面的局限性。在SBFEM框架下，建立了用于层合板热应力和屈曲分析的非齐次常系数常微分方程，以及基于精确积分法（PIM）的创新求解程序。该模型只需要对结构表面进行二维离散化，降低了模型的总自由度。利用PIM对结构的厚度方向进行了解析求解，有效地保证了数值计算的稳定性、准确性和高效性。该模型的特点是公式简单，控制方程推导直接，易于编程实现。数值结果表明，该方法具有收敛速度快、数值鲁棒性强、计算精度高、适用性广等优点，为层合板结构热弹性问题的精确求解提供了一种新的方法。

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引用次数: 0

Finite element modeling and crushing energy absorption analysis of AA6063/CFRP hybrid thin-walled tube subjected to quasi-static load 准静态载荷作用下AA6063/CFRP复合薄壁管的有限元建模及破碎吸能分析

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

Composite Structures

Pub Date : 2026-01-10 DOI: 10.1016/j.compstruct.2026.120058

Shenhua Li , Jinheng Zhang , Lihao Hou , Feng Xiong

AA6063/CFRP hybrid thin-walled tube represents a novel lightweight structural configuration characterized by high energy absorption efficiency and broad application scenarios. However, the numerical simulation methods and crushing energy absorption mechanisms for AA6063/CFRP hybrid thin-walled tubes remain in the exploratory phase. Consequently, this study focuses on finite element modeling and the crushing energy absorption characteristics of AA6063/CFRP hybrid thin-walled tubes subjected to quasi-static load. The main contributions and innovations of this paper are as follows: ① A finite element modeling strategy for AA6063/CFRP hybrid structures was proposed, leading to the development of a best fit simulation model for the hybrid thin-walled tube, achieving numerical simulation errors of less than 1 % for all five crashworthiness performance metrics；② Research findings reveal that AA6063/CFRP hybrid thin-walled tubes exhibit a competitive energy absorption mechanism between dissimilar materials under axial compressive loading, where an optimal cross-sectional design can fully activate the potential of this competitive energy absorption within the hybrid tubes；③ Under multi-angle oblique compressive loading, multi-cell AA6063/CFRP hybrid thin-walled tubes demonstrate a coupled enhancement effect, within the oblique pressure range of [0°, 35°], the maximum energy absorption enhancement ratio reached 21.05 %.

AA6063/CFRP复合薄壁管是一种新型的轻量化结构形式，具有吸能效率高、应用场景广泛等特点。然而，AA6063/CFRP复合薄壁管的数值模拟方法和破碎吸能机理仍处于探索阶段。因此，本研究重点研究了准静态载荷下AA6063/CFRP复合薄壁管的有限元建模和破碎吸能特性。本文的主要贡献和创新点如下：①提出了AA6063/CFRP复合材料结构的有限元建模策略，建立了该复合材料薄壁管的最佳拟合仿真模型，实现了5项抗撞性能指标的数值模拟误差小于1%；②研究结果表明，在轴向压缩载荷作用下，AA6063/CFRP复合材料薄壁管表现出不同材料间的竞争吸能机制；③在多角度斜向压缩载荷作用下，多芯AA6063/CFRP复合薄壁管表现出耦合增强效应，在[0°，35°]斜向压力范围内，复合薄壁管的最大吸能增强率达到21.05%。

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引用次数: 0

A study on the mechanical property requirements of the resin for composite overwrapped pressure vessels under cryogenic high-pressure conditions 低温高压条件下复合包覆压力容器用树脂力学性能要求研究

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

Composite Structures

Pub Date : 2026-01-10 DOI: 10.1016/j.compstruct.2026.120057

Zhuangzhuang Cao , Zhoutian Ge , Liangliang Qi , Sohail Yasin , Jianfeng Shi

Developing and modifying resins with excellent cryogenic mechanical properties is an effective solution to prevent matrix cracking in the composite overwrapped pressure vessels (COPVs) under cryogenic high-pressure conditions. However, the applicability of resins in COPVs at cryogenic temperatures still relies on experimental results, lacking appropriate mechanical property evaluation index for the resin. Therefore, this study established an analytical framework for “resin properties − composite material properties − vessel safety” and proposed mechanical property requirements for resins. In the framework, the stress and failure behavior of COPVs under cryogenic high-pressure conditions were analyzed based on three-dimensional elasticity theory and the Hashin failure criterion. The effects of resin tensile strength, elastic modulus, and coefficient of thermal expansion on the failure of COPVs were also examined. The results indicate the composite layer of COPVs undergoes matrix failure at lower internal pressures at cryogenic temperatures. Enhancing resin tensile strength, decreasing resin elastic modulus, and reducing the coefficient of thermal expansion are beneficial for improving the critical failure pressure at matrix failure. Furthermore, two-stage mechanical property requirements and specific indices for resins were established, providing guidance for the modification and development of resins for COPVs under cryogenic high-pressure conditions.

开发和改性具有优异低温力学性能的树脂是防止复合材料包覆压力容器（copv）在低温高压条件下基体开裂的有效途径。然而，树脂在低温下在copv中的适用性仍然依赖于实验结果，缺乏合适的树脂力学性能评价指标。因此，本研究建立了“树脂性能-复合材料性能-容器安全”的分析框架，并提出了树脂的力学性能要求。在此框架下，基于三维弹性理论和Hashin破坏准则，分析了低温高压条件下copv的应力和破坏行为。研究了树脂抗拉强度、弹性模量和热膨胀系数对copv破坏的影响。结果表明，低温下较低的内压下，copv复合层发生基体破坏。提高树脂抗拉强度，降低树脂弹性模量，降低热膨胀系数，有利于提高基体破坏时的临界破坏压力。建立了树脂的两阶段力学性能要求和具体指标，为低温高压条件下copv用树脂的改性和开发提供了指导。

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引用次数: 0

Direct prediction of mechanical energy released by damaged single lap joints using acoustic emission signals combined with finite element analysis 基于声发射信号与有限元分析相结合的损伤单搭接节点机械能直接预测

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

Composite Structures

Pub Date : 2026-01-09 DOI: 10.1016/j.compstruct.2025.119989

Thomas Wolfsgruber, Lukas Heinzlmeier, Martin Schagerl

Adhesively bonded single lap joints are common structures in lightweight design. Despite several advantages, damage initiation and propagation are critical and can be evaluated with structural health monitoring methods. This research combines analytical models and finite element analyses (FEAs) with acoustic emission (AE) measurements to predict the released mechanical energy (RME) during damage evolution.

Two geometries, either with both adherends of constant thickness or with one constant and one tapered adherend, are evaluated. One adherend consists of carbon fibre reinforced polymer, the other one of additively manufactured titanium. The work input during quasi-static loading for the overlap region is calculated based on the longitudinal load and displacement, and based on the longitudinal, lateral, and bending components. For the calculation of the RME, pristine and damaged load–displacement curves are compared. The pristine trends are represented by the extrapolation of an experiment, or an analytical model, or a FEA without failure model. Whereas, the damaged trends are either given by the experimental measurements or a FEA with included failure model. Furthermore, the RME can also be gathered directly from the FEA with failure model. By linking the AE energy with the RME, the RME of a validation sample can be predicted.

粘接单搭接是轻量化设计中常见的结构形式。尽管有一些优点，但损伤的发生和扩展是至关重要的，可以用结构健康监测方法进行评估。本研究将分析模型和有限元分析（FEAs）与声发射（AE）测量相结合，以预测损伤演化过程中释放的机械能（RME）。两种几何形状，要么具有恒定厚度的粘附体，要么具有一个常数和一个锥形粘附体，被评估。一种粘合剂由碳纤维增强聚合物组成，另一种由增材制造的钛组成。重叠区域准静态加载时输入的功是基于纵向载荷和位移，以及基于纵向、横向和弯曲分量计算的。在计算RME时，比较了原始荷载-位移曲线和破坏荷载-位移曲线。原始趋势由实验外推，或分析模型，或无失效模型的有限元分析来表示。而损伤趋势要么由试验测量结果给出，要么由含破坏模型的有限元分析给出。此外，RME也可以直接从具有失效模型的有限元分析中获得。通过将声发射能量与RME联系起来，可以预测验证样品的RME。

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引用次数: 0