EXPERIMENTAL INVESTIGATION INTO THE DYNAMIC IMPACTRESPONSES OF ALUMINUM HONEYCOMB PANEL FILLED WITH EPP FOAM

Abstract

Abstract: The paper investigated the dynamic impactresponses and failure process of aluminum honeycomb panel filled with EPP foam (Expanded polypropylene) experimentally.It was found that the initial peak stress and average stress of EPP foam filled aluminum honeycomb increased by 32.86%~68.57% and 15.00%~72.50% respectively, compared to the bare honeycomb under the same impact velocity. But the specific energy absorption (SEA) reduced by 33.54%~66.56%. For the filled panels with the same foam density, the initial peak stress,average stress and specific energy absorption increased with th increase in impact velocity. The SEA values under the impact velocity of 2.6 m/s and 3.2 m/s increased by 68.10%~152.45% compared to the impact velocity of 2 m/s. By comparing with the characteristics in the static compression test, the initial peak stress in the dynamic impact test increased by 1.72%~12.04%, whereas the average stress decreased by 6.51%~18.84%, and the SEA valuses decreased by 31.50%~65.50%. The study showed that EPP foam filling was effective to improve the impact performance of the bare aluminum honeycomb.

Key words: lightweight, aluminum honeycomb, EPP foam, Ls-dyna, dynamic impact characteristics

CLC Number:

TB332

LIU Qiang, HE Zhao-heng, CHEN Hang. EXPERIMENTAL INVESTIGATION INTO THE DYNAMIC IMPACTRESPONSES OF ALUMINUM HONEYCOMB PANEL FILLED WITH EPP FOAM[J]. Fiber Reinforced Plastics/Composites, 2018, 0(4): 45-50.

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