Foreign object damage and post-impact tensile behavior of plain-woven SiC/SiC composites

Han, Dong; Xu, Jie; Zhang, Huajun; Gao, Xiang; Han, Xiao; Sun, Li; Zheng, Zhikang; Zhang, Lu; Wang, Fang; Song, Yingdong

doi:10.1016/j.compstruct.2022.115767

Cited by 8 publications

(1 citation statement)

References 33 publications

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“…This undetectable damage can continuously grow in the subsequent use, leading to a decline in mechanical properties and potential failure [ 7 , 8 , 9 , 10 , 11 , 12 ]. Three-dimensional woven composites can effectively overcome the delamination behavior depending on the through-thickness binder yarns in comparison with traditional laminated composites, and their impact resistance and damage tolerance are improved [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. Comparative studies on the impact resistance of 2D and 3D woven composites show that 3D woven composites can absorb more impact energy, producing a smaller pit depth and damage area, and their delamination length and opening are less than those of 2D woven composites due to the suppression of z-yarns [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Micromechanisms and Characterization of Low-Velocity Impact Damage in 3D Woven Composites

et al. 2022

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Low-velocity impact (LVI) damage of 3D woven composites were experimentally and numerically investigated, considering different off-axis angles and impact energies. The impact responses were examined by LVI tests, and the damage morphology inside the composites was observed by X-ray micro-computed tomography (μ-CT). Yarn-level damage evolution was revealed by developing a hybrid finite element analysis model. The results show that the impact damage has significant directionality determined by the weft/warp orientation of the composites. The damage originates at the bottom of the impacted area and then expands outwards and upwards simultaneously, accompanied by in-plane and out-of-plane stress transfers. The straight-line distributed weft/warp yarns play an important role in bearing loads at the beginning of loading, while the w-shape distributed binder warp yarns gradually absorb impact deformation and toughen the whole structure as the loading proceeds. The effect of directional impact damage on post-impact performance was explored by performing compressing-after-impact (CAI) tests. It is revealed that the CAI properties along principal directions are more sensitive to the low-velocity impact, and the damage mode is significantly affected by the loading direction.

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