Multi-scale impact of geometric uncertainty on the interface bonding reliability of metal/polymer-based composites hybrid (MPH) structures

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Composite Structures Pub Date : 2024-10-10 DOI:10.1016/j.compstruct.2024.118640

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Abstract

Metal/polymer-based composites hybrid (MPH) structures combine the high strength of metals with the low density of polymer-based composites, making them widely used in automotive applications. However, the random characteristics of the microgeometry at the pretreated MPH interface have made it challenging to predict its interface bonding failure probability accurately and quickly. This paper presents an advanced FE² prediction method for bonding performance of MPH interface based on multi-fidelity regression and artificial neural networks (ANNs). When compared to experimental fracture mechanics results for failure mode I and II, the prediction errors for peak loads are 3.9 % and 5.6 %, respectively. At same time, the computational efficiency is over 6 times higher than that of traditional FE² methods. Additionally, how interface microstructure parameters affect the tensile/shear performance, crack initiation, and propagation directions are investigated at the micro-scale. Under combined tensile/shear loads, the propagation mechanisms of interface microgeometry uncertainties in MPH are revealed theoretically. An interface design method with a high adhesion probability is proposed, identifying high load-bearing areas within the feasible design domain under bending loads for MPH structures. This provides a quickly accessible parameter matching scheme during conceptual design, offering a theoretical foundation for the application of MPH structures in engineering fields.

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几何不确定性对金属/聚合物基复合材料混合（MPH）结构界面粘接可靠性的多尺度影响

金属/聚合物基复合材料混合（MPH）结构兼具金属的高强度和聚合物基复合材料的低密度，因此被广泛应用于汽车领域。然而，由于预处理后的 MPH 接口微几何形状具有随机性，因此要准确、快速地预测其接口粘接失效概率具有挑战性。本文基于多保真度回归和人工神经网络（ANN），提出了一种先进的 MPH 界面粘接性能 FE2 预测方法。与失效模式 I 和 II 的断裂力学实验结果相比，峰值载荷的预测误差分别为 3.9 % 和 5.6 %。同时，计算效率是传统 FE2 方法的 6 倍以上。此外，还在微观尺度上研究了界面微观结构参数如何影响拉伸/剪切性能、裂纹起始和扩展方向。在联合拉伸/剪切载荷下，从理论上揭示了 MPH 中界面微观几何不确定性的传播机制。提出了一种具有高粘附概率的界面设计方法，在 MPH 结构的弯曲载荷下，确定可行设计域内的高承载区域。这为概念设计提供了一个快速可用的参数匹配方案，为 MPH 结构在工程领域的应用奠定了理论基础。

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.