【新文速递】2024年8月19日固体力学SCI期刊最新文章

今日更新：Composite Structures 2 篇，Composites Part A: Applied Science and Manufacturing 3 篇，Composites Part B: Engineering 1 篇，Composites Science and Technology 1 篇Composite StructuresNonlinear finite element damage analysis of laminated shells by Carrera Unified FormulationPedro Bührer Santana, António Joaquim Mendes Ferreira, Herbert Martins Gomes, Volnei Titadoi:10.1016/j.compstruct.2024.118494 基于Carrera统一公式的层合壳非线性有限元损伤分析The paper presents a comprehensive study on the nonlinear finite element analysis of laminated shells, employing the Carrera Unified Formulation (CUF) in conjunction with a progressive damage model developed by Tita et al. (2008). This research focuses on accurately predicting the behavior of laminated composite structures under progressive damage. The model accounts for both polymer matrix and fiber failures, and the numerical implementation and simulations are performed using MATLAB. The study validates the proposed framework by comparing the numerical results with experimental data, demonstrating a good agreement and thus confirming the model’s capability to capture the nonlinear behavior of laminated shells during damage progression. The research also highlights the importance of the CUF in providing a versatile approach to finite element analysis, allowing for different families of elements and, thickness expansions and use of failure criteria that consider out of plane stresses, which can be particularly useful for a more detailed and physically consistent analysis of damage in composite materials.本文采用Carrera统一公式(CUF)结合Tita等人(2008)开发的渐进损伤模型，对层合壳的非线性有限元分析进行了全面研究。本研究的重点是准确预测层合复合材料结构在渐进损伤下的行为。该模型同时考虑了聚合物基体和光纤的失效，并利用MATLAB进行了数值实现和仿真。通过将数值结果与实验数据进行比较，验证了所提出的框架，证明了两者的良好一致性，从而证实了该模型能够捕捉层合壳在损伤过程中的非线性行为。该研究还强调了CUF的重要性，它为有限元分析提供了一种通用的方法，允许不同的单元，厚度扩展和使用考虑面外应力的失效标准，这对于更详细和物理一致的复合材料损伤分析特别有用。Mechanical characterisation and high temperature analysis of hyperelastic adhesives – Modelling and experimental validationF.J. Simón-Portillo, E.A.S. Marques, M. Fabra-Rodriguez, L.F.M. da Silva, M. Sánchez-Lozanodoi:10.1016/j.compstruct.2024.118511超弹性胶粘剂的力学特性和高温分析。建模和实验验证Adhesive bonds are subject to multiple environmental conditions that can affect their mechanical performance during service. Therefore, it is important to evaluate the influence of temperature on adhesive strength, as it can impact joint safety and should be considered during the design phase. This study presents an analysis of the effect of high temperatures on the mechanical behaviour of joints made with highly elastic adhesives, specifically a polyurethane and a silicon-modified polymer. Shear and tensile tests were conducted at temperatures of 23, 50, and 80 °C using dumbbell specimens for tensile tests and single lap specimens (SLJ) for shear tests. The tests were performed with two different substrates, aluminium (Al) and glass fibre reinforced polyester panel (GRP), and with varying adhesive thicknesses. These tests aim to assess the impact of temperature conditions on the mechanical properties of the adhesive and the behaviour of the joints. The analysis of the experimental results reveals that the adhesive degrades when exposed to high temperatures, resulting in reduced strength and stiffness, and less linear behaviour. Furthermore, this work involves the determination of a model able to reproduce the mechanical behaviour of hyperelastic adhesive at high temperatures, considering diverse constitutive modelling approaches. To achieve this, a testing protocol was conducted on basic uniaxial and planar specimens. The results indicate that the Ogden N=2 model is the most suitable for representing the non-linear behaviour of the hyperelastic adhesive at high temperatures. In contrast, the Mooney Rivlin model is more suitable to represent the material behaviour under ambient conditions. To conclude this work, the law has been satisfactorily validated by comparing the results of tests carried out on SLJ specimens with different adhesive thicknesses.粘合剂在使用过程中会受到多种环境条件的影响，这些环境条件会影响其机械性能。因此，评估温度对粘接强度的影响是非常重要的，因为它会影响到接头的安全性，在设计阶段就应该考虑到这一点。本研究分析了高温对高弹性胶粘剂(特别是聚氨酯和硅改性聚合物)制造的关节机械行为的影响。剪切和拉伸试验分别在23、50和80℃的温度下进行，使用哑铃试样进行拉伸试验，使用单搭试样(SLJ)进行剪切试验。测试采用两种不同的基材，铝(Al)和玻璃纤维增强聚酯板(GRP)，并具有不同的粘合剂厚度。这些测试旨在评估温度条件对粘合剂机械性能和接头行为的影响。对实验结果的分析表明，当暴露在高温下时，粘合剂会降解，导致强度和刚度降低，线性行为减少。此外，考虑到不同的本构建模方法，这项工作涉及到能够在高温下重现超弹性粘合剂力学行为的模型的确定。为此，对基本单轴和平面试件进行了测试。结果表明，Ogden N=2模型最适合描述超弹性胶粘剂在高温下的非线性行为。相比之下，Mooney Rivlin模型更适合表征材料在环境条件下的行为。最后，通过比较不同粘结厚度的SLJ试件的试验结果，该规律得到了令人满意的验证。Composites Part A: Applied Science and ManufacturingDeep transfer learning for efficient and accurate prediction of composite pressure vessel behaviorsHyunsoo Hong, Wonki Kim, Samuel Kim, Kwanho Lee, Seong Su Kimdoi:10.1016/j.compositesa.2024.108413 高效、准确预测复合压力容器行为的深度迁移学习Composite pressure vessels are manufactured by winding carbon fiber-reinforced plastic, while its performance is determined by fabrication conditions. To properly design composite pressure vessels, it is essential to analyze their behavior according to the design parameters. However, analytical or numerical methods have limitations in terms of accuracy or cost-effectiveness. In this study, a method is proposed to accurately and efficiently predict the behavior of composite pressure vessels through deep transfer learning. A prediction model is built by pre-training on a sufficient amount of analytical data, and then fine-tuning on a limited amount of numerical data. The performance of the deep transfer learning-based prediction model was evaluated through various error assessments. Its computational cost was also compared with that of finite element analysis. Furthermore, the deep transfer learning-based prediction model was used to analyze the impact of design parameters on the behavior of composite pressure vessels and for design optimization.复合材料压力容器采用缠绕碳纤维增强塑料制造，其性能取决于制造条件。为了合理设计复合材料压力容器，必须根据设计参数对其进行性能分析。然而，分析或数值方法在准确性或成本效益方面存在局限性。本文提出了一种基于深度迁移学习的复合材料压力容器行为预测方法。预测模型是通过在足够数量的分析数据上进行预训练，然后在有限数量的数值数据上进行微调来建立的。通过各种误差评估来评估基于深度迁移学习的预测模型的性能。并将其计算成本与有限元分析进行了比较。在此基础上，利用基于深度迁移学习的预测模型分析了设计参数对复合材料压力容器性能的影响，并进行了设计优化。Failure investigation of woven scarf-repaired laminates reinforced with nanoparticles: Experimental and numerical investigationsMonika Kushwaha, A. Arockiarajandoi:10.1016/j.compositesa.2024.108425 纳米颗粒增强编织带修复层合板的失效研究:实验和数值研究This study explores the efficacy of multi-walled carbon nanotubes (MWCNTs) and graphene nanoplatelets (GNPs) as nano-reinforcement for the epoxy adhesive layer in scarf joints and 3D scarf-repaired laminates subjected to tensile loading. Experimental characterization of pure epoxy and nanocomposite mechanical properties was validated using the Mori–Tanaka method (incorporating agglomeration effects). A 3D finite element model considering material non-linearity and strain-based damage was employed to investigate joint failure behaviour, validated for 0.5 vol% MWCNT and GNP concentrations. A subsequent parametric study explored the influence of scarf angle, nanoparticle concentration, and patch configuration on 3D repaired specimens. The results suggest a 2.86° scarf angle with a [(+45/−45)]4s patch configuration reinforced with 1 vol% MWCNTs and 0.5 vol% GNPs exhibits the highest tensile strength improvement.本研究探讨了多壁碳纳米管（MWCNTs）和石墨烯纳米片（GNPs）作为环氧树脂粘合剂层的纳米增强材料在承受拉伸载荷的疤痕连接和三维疤痕修复层压板中的功效。使用 Mori-Tanaka 方法（包含团聚效应）验证了纯环氧树脂和纳米复合材料机械性能的实验特性。三维有限元模型考虑了材料的非线性和基于应变的损伤，用于研究接合失效行为，并对 0.5 Vol% 的 MWCNT 和 GNP 浓度进行了验证。随后进行的参数研究探讨了围巾角度、纳米粒子浓度和贴片配置对三维修复试样的影响。研究结果表明，采用 2.86° 的围巾角、[(+45/-45)]4s 补丁配置以及 1 Vol% 的 MWCNTs 和 0.5 Vol% 的 GNPs 增强后，拉伸强度的改善幅度最大。Effects of temperature on the anisotropic mechanical properties and failure mechanisms of Sheet Molding CompoundsKepa Zulueta, Iñaki Madina, Udane Astobitza, Alex Arrillaga, Jose Luis Vilasdoi:10.1016/j.compositesa.2024.108424温度对板料复合材料各向异性力学性能及破坏机制的影响Sheet Molding Compounds (SMC) are widely used in many industries. Due to their high in-mold flow, fibers tend to align during the component processing and generate anisotropic mechanical properties. Besides, being SMCs thermoset composites, their application in high temperature environments often results to be of interest. In this research, the fiber orientation and temperature-dependent mechanical behavior and failure mechanisms were studied. First, materials were compression molded into plates, promoting fiber orientation. Then, the materials’ orientation-dependent viscoelastic behavior was analyzed by Dynamic Mechanical Analysis, and their anisotropy level was assessed at quasi-static tensile, bending and compression modes at 23 °C and 130 °C. Finally, the failure mechanisms were inspected by confocal microscopy to evaluate the influence of temperature and fiber orientation on them. The results demonstrate how the temperature influences the material’s mechanical performance and their anisotropic behavior, especially at 45°. Likewise, temperature alters failure mechanisms, by triggering the fiber-matrix interface failure.片状成型化合物(SMC)广泛应用于许多行业。由于其高模内流动，纤维在零件加工过程中倾向于排列并产生各向异性的力学性能。此外，作为SMCs热固性复合材料，它们在高温环境中的应用经常引起人们的兴趣。在本研究中，研究了纤维取向和温度相关的力学行为和破坏机制。首先，材料被压缩成板，促进纤维定向。然后，通过动态力学分析分析材料的定向粘弹性行为，并在23 °C和130 °C的准静态拉伸、弯曲和压缩模式下评估材料的各向异性水平。最后，通过共聚焦显微镜观察了温度和纤维取向对其破坏机制的影响。结果表明温度对材料力学性能及其各向异性行为的影响，特别是在45°时。同样，温度通过触发纤维-基质界面的破坏来改变破坏机制。Composites Part B: EngineeringEnabling martensitic transformation in Shape Memory Alloy Hybrid Composites via an elastomeric interface: an experimental and numerical investigationGregorio Pisaneschi, Tommaso Maria Brugo, Paolo Cosseddu, Giulia Scalet, Andrea Zucchellidoi:10.1016/j.compositesb.2024.111785通过弹性界面实现形状记忆合金混杂复合材料马氏体相变的实验与数值研究Shape Memory Alloy Hybrid Composites (SMAHCs) hold great promise for different applications. However, the interface between SMAs and the matrix presents challenges due to large strains associated with the martensitic transformations (MTs). Although different strategies have been proven effective in increasing interfacial strength, debonding and its prevention remain unresolved. Therefore, to enable MTs in SMAHCs, this paper proposes a novel solution using a rubber-like elastomeric interface. Pull-out SMAHC specimens were tested at different embedding lengths with and without the elastomeric interface. Specimens with the elastomeric interface showed better performance and stress-strain transfer during MT up to SMA wire breakage. The behaviour of the interface was studied using finite element analysis. A fine-tuning method was proposed for the cohesive zone model parameters. Simulated pull-out tests matched experimental data, revealing the debonding mechanisms. However, results with the elastomer underscored the need to fully represent the underlying physics of the highly deformable interface.形状记忆合金混合复合材料(SMAHCs)在不同的应用中具有很大的前景。然而，由于与马氏体相变(MTs)相关的大应变，sma与基体之间的界面存在挑战。虽然不同的策略已被证明可以有效地提高界面强度，但脱粘及其预防仍未解决。因此，为了在SMAHCs中实现MTs，本文提出了一种使用类橡胶弹性界面的新解决方案。在不同埋置长度下，对有弹性界面和无弹性界面的SMAHC拉拔试件进行了测试。具有弹性界面的试件在MT至SMA钢丝断裂过程中表现出更好的性能和应力-应变传递。采用有限元方法研究了接触面的受力特性。提出了一种内聚区模型参数的微调方法。模拟拔出试验与实验数据相匹配，揭示了脱粘机制。然而，弹性体的研究结果强调了充分表征高度可变形界面的潜在物理特性的必要性。Composites Science and TechnologySimultaneous electrical and mechanical properties improvement for composite expanded graphite bipolar plate by incorporating surface-activated carbon black paving on the carbonized melamine foam skeletonXiaoyu Mao, Yifan Li, Yong Li, Dahai Zhu, Wei Yu, Yuang Ji, Donghui Wang, Xiufeng Hudoi:10.1016/j.compscitech.2024.110822 在碳化三聚氰胺泡沫骨架上添加表面活性炭黑，可同时改善复合膨胀石墨双极板的电气和力学性能The bipolar plate is the critical component that directly impacts the output performance and lifespan of the fuel cell. Composite graphite-based bipolar plates, which can be tailored to exhibit desired properties, are promising candidates for high-performance fuel cells. However, the simultaneous optimization of their electrical and mechanical properties has been a major challenge in the field. This study introduces a foam skeleton made of carbonized melamine foam (CMF) into the graphite bipolar plate to create ample space for subsequent resin impregnation. Carbon black (CB) is added as a filler to form complete conductive paths, which is modified using low-temperature plasma to allow it to be more uniformly adsorbed in the skeleton. The microstructure design of the composite bipolar plate ensures excellent mechanical properties and significantly enhances its electrical conductivity. Moreover, it effectively eliminates the impact of carbon black on the surface roughness of the composite plate. This design also provides superior water management and reduces gas permeability. Practical application tests demonstrate that the developed composite plate exhibits better corrosion resistance and electrochemical stability than metal bipolar plates. Compared to carbonized bipolar plates, it displays better impact resistance and stability.双极板是直接影响燃料电池输出性能和寿命的关键部件。复合石墨基双极板，可以定制显示所需的性能，是高性能燃料电池的有希望的候选者。然而，同时优化其电气和机械性能一直是该领域的主要挑战。本研究将碳化三聚氰胺泡沫(CMF)制成的泡沫骨架引入石墨双极板，为后续的树脂浸渍创造充足的空间。添加炭黑(CB)作为填料形成完整的导电路径，使用低温等离子体对其进行改性，使其更均匀地吸附在骨架中。复合双极板的微观结构设计保证了其优异的力学性能，并显著提高了其导电性。而且有效地消除了炭黑对复合板表面粗糙度的影响。这种设计还提供了卓越的水管理和降低气体渗透性。实际应用试验表明，所研制的复合极板比金属双极板具有更好的耐腐蚀性和电化学稳定性。与碳化双极板相比，具有更好的抗冲击性能和稳定性。来源：复合材料力学仿真Composites FEM