Investigating the Effects of Contact Area and Chamfering on the Failure Behavior of Plain Woven Composite-Metal T-joints

IF 2.3 4区材料科学 Q3 MATERIALS SCIENCE, COMPOSITES Applied Composite Materials Pub Date : 2024-03-20 DOI:10.1007/s10443-024-10220-5

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Abstract

This paper experimentally and numerically investigates the failure behavior of plain woven composite-metal connection structures (T-joints) under loads in different directions. According to the direction of load application, it can be divided into TX specimens and TZ specimens. Wherein, TX and TZ are subjected to the tensile load parallel and perpendicular to the composite panel, respectively. Test results show significant differences in the ultimate load, failure modes and strain distribution among different specimens. Increasing the contact area between the lower block and the composite panel and adding round to the contact part between the metal part and the composite panel can improve the load-carrying capacity of the T-joints. The multiscale simulation is conducted to study the failure process of T-joints. Micro-scale and meso-scale models are established to obtain the mechanical properties of the plain woven composite, and the error between the simulated results and the experimental data is less than 10%. Progressive damage analysis is then done by using the macro-scale model. The simulated failure load and damage process of T-joints are consistent with the test results. The information and proposed multiscale analysis method on the failure behavior of T-joints are useful for the optimal design of similar structures.

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研究接触面积和倒角对平纹编织复合材料-金属 T 型接头失效行为的影响

摘要本文通过实验和数值计算研究了平织复合材料-金属连接结构（T 型接头）在不同方向荷载作用下的破坏行为。根据施加载荷的方向，可分为 TX 试样和 TZ 试样。其中，TX 和 TZ 分别承受平行于复合板和垂直于复合板的拉伸载荷。试验结果表明，不同试样的极限载荷、破坏模式和应变分布存在明显差异。增大下块与复合材料面板的接触面积以及在金属部分与复合材料面板的接触部分增加圆形，可以提高 T 型接头的承载能力。为研究 T 型接头的失效过程，进行了多尺度模拟。通过建立微观尺度和中观尺度模型来获得平织复合材料的力学性能，模拟结果与实验数据的误差小于 10%。然后利用宏观尺度模型进行渐进损伤分析。T 型接头的模拟破坏载荷和破坏过程与试验结果一致。有关 T 型接头破坏行为的信息和所提出的多尺度分析方法有助于类似结构的优化设计。

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来源期刊

Applied Composite Materials 工程技术-材料科学：复合

CiteScore

4.20

自引率

4.30%

发文量

审稿时长

1.6 months

期刊介绍： Applied Composite Materials is an international journal dedicated to the publication of original full-length papers, review articles and short communications of the highest quality that advance the development and application of engineering composite materials. Its articles identify problems that limit the performance and reliability of the composite material and composite part; and propose solutions that lead to innovation in design and the successful exploitation and commercialization of composite materials across the widest spectrum of engineering uses. The main focus is on the quantitative descriptions of material systems and processing routes. Coverage includes management of time-dependent changes in microscopic and macroscopic structure and its exploitation from the material''s conception through to its eventual obsolescence.