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Steel and Composite Structures
  Volume 33, Number 6, December25 2019, pages 837-847

Energy absorption investigation of square CFRP honeycomb reinforced by PMI foam fillers under quasi-static compressive load
Hao Zhou, Rui Guo, Kuo Bao, Haiyang Wei and Rongzhong Liu

    A type of hybrid core made up of thin-walled square carbon fiber reinforced polymer (CFRP) honeycomb and Polymethacrylimide (PMI) foam fillers was proposed and prepared. Numerical model of the core under quasi static compression was established and validated by corresponding experimental results. The compressive properties of the core with different configurations were analyzed through numerical simulations. The effect of the geometrical parameters and foam fillers on the compressive response and energy absorption of the core were analyzed. The results show that the PMI foam fillers can significantly improve the compressive strength and energy absorption capacity of the square CFRP honeycomb. The geometrical parameters have marked effects on the compressive properties of the core. The research can give a reference for the application of PMI foam materials in energy absorbing structures and guide the design and optimization of lightweight and energy efficient cores of sandwiches.
Key Words
    CFRP; honeycomb; PMI foam filler; quasi static; compressive property; numerical simulation
School of Mechanical Engineering, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing 210094, P. R. China.

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