In-plane dynamic response and energy absorption characteristics of improved star-shape honeycomb structure
HU Jinshun1,2, LIN Yongshui1,2, CHEN Wei1,2, LI Xiaobin3, WU Weiguo4
1.School of Science, Wuhan University of Technology, Wuhan 430063, China;
2.Hubei Provincial Key Lab of New Materials Mechanics Theory and Application, Wuhan 430063, China;
3.School of Transportation, Wuhan University of Technology, Wuhan 430063, China;
4.Green Intelligent River-Sea Direct Ship, Cruise and Yacht Research Center, Wuhan University of Technology, Wuhan 430063, China
Abstract：To improve the energy absorption stability of the honeycomb structure. Based on the star-shape honeycomb structure (SSH: star-shape honeycomb), an arrow was used to replace its horizontal wall, and a thin-walled square contacting four concave corners was introduced to construct an improved star-shape honeycomb (ISSH: improved star-shape honeycomb). Based on the one-dimensional shock wave theory, three different crushing velocities of the improved star-shaped honeycomb were determined. The deformation mode and energy absorption characteristics under different impact velocitys were analyzed by finite element simulation. Based on the deformation characteristics of typical elements, a theoretical calculation model was constructed, and the plateau stress under low-velocity and high-velocity loading was obtained according to the principle of energy conservation and momentum conservation, respectively. The theoretical calculation and numerical simulation results showed good agreement. The results showed that, compared with SSH, the addition of arrow-shaped and square structures greatly increased the stability of ISSH deformation. And ISSH had a stronger energy absorption capacity. The present results are significant for the design of impact protective structures.
Keywords: star-shaped honeycomb; plateau stress; deformation mode; specific energy absorption; stress-strain curve
胡锦顺1,2，林永水1,2，陈威1,2，李晓彬3，吴卫国4. 改进星形蜂窝结构面内动力学响应及能量吸收特性研究[J]. 振动与冲击, 2022, 41(23): 119-128.
HU Jinshun1,2, LIN Yongshui1,2, CHEN Wei1,2, LI Xiaobin3, WU Weiguo4. In-plane dynamic response and energy absorption characteristics of improved star-shape honeycomb structure. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(23): 119-128.
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