S型碳纤维褶皱夹芯结构低速冲击响应特性实验研究

doi:10.7527/S1000-6893.2021.25446

Abstract

Abstract: To study the mechanical response characteristics of the sandwich structure S-type CFRP folded core under low speed impact, the S-shaped folded core was prepared by the molding method, and then the sandwich structure with S-shaped CFRP folded core was obtained by face-to-core bonding and curing. The cylindrical punch with diameter 20 mm is preloaded with different energy to impact the node and base position of the structure, and the damage mode and response characteristics of the two typical positions of the structure under different impact energy are studied. The results show that fiber shear fracture is the main damage for the upper panel is, while tensile and crushing fracture for the core layer; fiber tensile tearing and matrix cracking are the main damages for the lower panel under different impact energy. Under the same impact energy, the node of sandwich panel shows better impact resistance in terms of damage depth and peak load. From the perspective of energy consumption, the node of sandwich panel absorbs more energy than the base under high energy impact.

Key words: composite, sandwich structure with folded core, impact, failure mechanism, dynamic response

CLC Number:

V258

DENG Yunfei, ZHOU Nan, TIAN Rui, WEI Gang. Response characteristics of sandwich structure with S-shaped CFRP folded core under low velocity impact[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(6): 525446-525446.

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Response characteristics of sandwich structure with S-shaped CFRP folded core under low velocity impact

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