| Citation: | GUAN Qingyu, FENG Jianfei, XIA Pinqi, et al. Low-velocity impact behavior and residual tensile strength of composite laminates[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(6): 1220-1232. doi: 10.13700/j.bh.1001-5965.2020.0132(in Chinese)
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The low-velocity impact behavior and residual tensile strength of composite laminates are experimentally studied in this paper. Firstly, the effects of impactor type and layup type on the impact responses of laminates are investigated by impact tests, and damage characteristics are evaluated by using the dent depth, damage projection area, impact force and impact energy translation. Secondly, the tensile response and residual tensile strength of the laminates after impact are investigated by quasi-static tensile tests. Finally, the mechanism of the effects of impactor type and layup type on the impact behavior and residual tensile strength of the laminates are analyzed. The results indicate that: the effect of impactor type on impact damage of composite laminate is closely related to the function of the projection area of impact contact surface with the dent depth; under the condition of high impact energy, the strip impactor is a critical impact threat to damage, while the damage caused by corner impactor is relatively not serious; the type of layup has a remarkable influence on the impact damage resistance performance and tensile fracture morphology of the laminates.
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