Failure mechanisms of cross-ply carbon fiber reinforced polymer laminates under longitudinal compression with experimental and computational analyses
| Autor: | Zhaoxu Meng, Haolong Liu, Hong Tae Kang, Haiding Guo, Xuming Su, Zhangxing Chen, Guowei Zhou, Qingping Sun |
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| Rok vydání: | 2019 |
| Předmět: |
Carbon fiber reinforced polymer
Materials science Mechanical Engineering Delamination Cross ply 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Compression (physics) 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences Compressive load Matrix (mathematics) Mechanics of Materials Matrix splitting Ceramics and Composites Fiber Composite material 0210 nano-technology |
| Zdroj: | Composites Part B: Engineering. 167:147-160 |
| ISSN: | 1359-8368 |
| Popis: | This study investigates the failure mechanisms of cross-ply laminates subjected to longitudinal compressive loading. A sequence of failure initiation and propagation process is observed based on optical microscopy images of failed specimens. Specifically, the failure process in the cross-ply laminates involves a combination of four failure mechanisms: fiber kinking, delamination, matrix cracking, and fiber/matrix splitting. We find that the kink-bands in the middle 0° plies of the cross-ply laminates most often show a wedge shape and the angle of matrix cracks in the 90° plies is slightly larger than that of pure 90° plies. The reason has been attributed to the constraining effects by the adjacent plies. The next focus of this study is to propose hybrid micro-macro models to more systematically study the failure mechanisms of the cross-ply laminates. We show that these models accurately predict the combined failure modes of the cross-ply laminates and enable us to closely investigate the interactions of different failure mechanisms. More importantly, the hybrid models achieve great computational efficiency compared to full-scale microstructural models. The combined experimental and computational analyses presented here provide a new level of understanding of the kink-band morphology and damage mechanisms in the cross-ply laminates. |
| Databáze: | OpenAIRE |
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