Coupon scale Z-pinned IM7/8552 delamination tests under dynamic loading
| Autor: | Ivana K. Partridge, Sathiskumar A. Ponnusami, Stephen R. Hallett, Giuliano Allegri, Yusuf Mahadik, Hao Cui, Nik Petrinic |
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| Rok vydání: | 2019 |
| Předmět: |
HD
Through-thickness reinforcement Materials science Scale (ratio) Fracture Mechanics Delamination Composite number Fracture mechanics 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Shear (sheet metal) Mechanics of Materials Dynamic loading Crack initiation Ceramics and Composites TJ Composite material 0210 nano-technology Reinforcement |
| Zdroj: | Cui, H, Mahadik, Y, Hallett, S R, Partridge, I K, Allegri, G, Ponnusamic, S A & Petrinic, N 2019, ' Coupon scale Z-pinned IM7/8552 delamination tests under dynamic loading ', Composites Part A: Applied Science and Manufacturing, vol. 125, 105565 . https://doi.org/10.1016/j.compositesa.2019.105565 |
| ISSN: | 1359-835X |
| DOI: | 10.1016/j.compositesa.2019.105565 |
| Popis: | Dynamic impact onto laminated composite structures can lead to large-scale delamination. This can be mitigated by the introduction of through-thickness reinforcement, such as z-pins. Here, mode I & II and mixed-mode delamination tests have been designed and conducted at high loading rate, for both unpinned and Z-pinned coupons to study the effect of rate of loading. It was found that the Z-pins were not effective in delaying the dynamic crack initiation or resisting the dynamic propagation of delaminations shorter than 5 mm. However, the further growth of cracks was substantially delayed by Z-pinning, especially for the pure mode I and mode I dominated failure modes. On the other hand, the effectiveness of Z-pins in shear tests was relatively modest. The mode I dominated delamination resistance of Z-pinned laminates was found to be sensitive to the loading rate. |
| Databáze: | OpenAIRE |
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