Stress wave propagation law and energy dissipation mechanism of layered composite structure

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (15) : 209-216.

ZOU Youchun, XIONG Chao, YIN Junhui, DENG Huiyong, CUI Kaibo

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Abstract

In order to study the stress wave characteristics and energy dissipation mechanism of the layered composite structure, silicon carbide ceramic/ultra-high molecular weight polyethylene/titanium alloy (SiC/UHMWPE/TC4) and SiC/TC4/UHMWPE composite structures were designed, and the Split-Hopkinson Pressure Bar (SHPB) test and numerical simulation were carried out. Based on the excellent energy dissipation performance of entangled metallic wire material (EMWM), SiC/UHMWPE/EMWM/TC4 and SiC/TC4/EMWM/UHMWPE composite structures were designed, and SHPB tests were carried out. The results show that the EMWM in the composite structure has delayed and hindered effects on the transmission of stress waves. The EMWM composite structure dissipates impact energy by reflecting most of the incident energy. Compared with other composite structures that dissipate impact energy mainly through the destruction of SiC, the energy dissipation mechanism of the EMWM composite structure is more reasonable and the impact resistance is better. UHMWPE placed on the back of SiC can give full play to the cushioning properties of UHMWPE and EMWM and reduce the damage of SiC. TC4 placed on the back of SiC will aggravate the damage of SiC.
Key words: Entangled Metallic Wire Material; dynamic shock; energy dissipation mechanism; composite structure

Key words

Entangled Metallic Wire Material / dynamic shock / energy dissipation mechanism / composite structure

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ZOU Youchun, XIONG Chao, YIN Junhui, DENG Huiyong, CUI Kaibo. Stress wave propagation law and energy dissipation mechanism of layered composite structure[J]. Journal of Vibration and Shock, 2022, 41(15): 209-216

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