The Effect of the Geometrical Parameter and Stacking Sequence on Damage Behavior of Unidirectional Carbon / Epoxy Laminate

IF 0.8 Q3 ENGINEERING, MULTIDISCIPLINARY

International Journal of Engineering Research in Africa Pub Date : 2023-06-19 DOI:10.4028/p-aou909

M. Bellahkim, Y. Benbouras, A. Maziri, E. Mallil, J. Echaabi

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Abstract

In this work, an experimental test series was carried out in order to evaluate the influence of the geometry of the specimen and stacking sequence on macroscopic behavior and the failure modes. A CFRP prepreg unidirectional was used to perform the tested specimens according to ASTM D790 standard. Five main lay-up configurations have been analyzed: [0]12, [±30]3s, [±45]3s, [±80]3s, and [0/90]3s subjected to flexural loading. The macroscopic behavior was followed by an MTS machine equipped with a bending fixture. A digital microscope is used to follow the microscopic failure modes during loading. These laminates exhibit a more complex behavior due to coupling effects and the combination of different failure modes. However, the most predominant damage observed is delamination accompanied with matrix cracking. Furthermore, the present work has shown a linear behavior of [0]12, [±80]3s, [0/90]3s, and a distinctive behavior of [±45]3s and [±30]3s laminate under flexural loading due to its pseudo ductile behavior.

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几何参数和堆积顺序对单向碳/环氧层压板损伤行为的影响

为了评估试件几何形状和堆砌顺序对宏观行为和破坏模式的影响，进行了一系列的实验测试。按照ASTM D790标准，采用CFRP预浸料单向执行试件。分析了五种主要的铺层结构:[0]12、[±30]3s、[±45]3s、[±80]3s和[0/90]3s承受弯曲载荷。在配备弯曲夹具的MTS机器上跟踪宏观行为。用数码显微镜跟踪加载过程中的微观破坏模式。由于耦合效应和不同破坏模式的组合，这些层合板表现出更复杂的行为。然而，观察到的最主要的损伤是分层伴随基体开裂。此外，目前的研究表明bbb12、[±80]3s、[0/90]3s的线性行为，以及[±45]3s和[±30]3s层压板在弯曲载荷下的独特行为，这是由于它的伪延性行为。

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来源期刊

International Journal of Engineering Research in Africa ENGINEERING, MULTIDISCIPLINARY-

CiteScore

1.80

自引率

14.30%

发文量

期刊介绍： "International Journal of Engineering Research in Africa" is a peer-reviewed journal which is devoted to the publication of original scientific articles on research and development of engineering systems carried out in Africa and worldwide. We publish stand-alone papers by individual authors. The articles should be related to theoretical research or be based on practical study. Articles which are not from Africa should have the potential of contributing to its progress and development.