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Citation |
Zhou H, Sun B, Gu B. Int. J. Crashworthiness 2016; 21(4): 353-366. |
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Copyright |
(Copyright © 2016, Informa - Taylor and Francis Group) |
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DOI |
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PMID |
unavailable |
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Abstract |
This paper compares the responses of three-dimensional four-directional (3D4D) and five-directional (3D5D) circular braided composite tubes under transverse impact loading. Transverse impact tests were conducted on a modified Split-Hopkinson pressure bar (SHPB). A finite-element analysis (FEA) model was established based on the microstructure of 3D circular braided preform. Load-displacement curves, specific load and specific energy absorption were obtained for the purpose of comparison between 3D4D and 3D5D samples. It was found that the peak load of the 3D5D tube was about twice that of 3D4D tube. The specific load and the specific energy absorption of 3D5D tubes were averagely about 1.21 times and 1.18 times those of 3D4D tubes, respectively. Due to the existence of straight axial yarns, the deformation of the 3D5D braided tube was smaller than that of the 3D4D braided tube. Stress propagation in the straight axial yarns was observed to be faster than that in the crimped braiding yarns. The damage morphologies were observed and it was found that the damages of the 3D4D braided tubes were severer than those of the 3D5D braided tubes. Language: en |