Protection properties and application of the materials with double arrowhead negative Poisson’s ratio and structures under impact loading

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (22) : 241-247.

YAN Peng,ZHAO Guiping

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Abstract

Double arrowhead honeycombs(DAH) material is one of mechanical metamaterial with negative Poisson’s ratio. The energy absorption of DAH’s with different relative densities is explored by using numerical simulations. It can be found that the specific energy absorption of DAH material decreased with the increase of relative density. A collision model for protective structures with DAH cushion material is established to study the impact energy absorption of the structures and dynamic responses attenuation of inner objects during process of colliding with the rigid ground. The results show that DAH cushion material can absorb a large number of impact energy so that the peak value of the dynamic responses of the inner structure protected is reduced. Meanwhile, the critical impact velocity of the protective structures with DAH cushion material during collision is proposed.

Key words

double arrowhead honeycombs, impact response, negative Poisson&rsquo / s ratio, protective structures, numerical simulations

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YAN Peng,ZHAO Guiping. Protection properties and application of the materials with double arrowhead negative Poisson’s ratio and structures under impact loading[J]. Journal of Vibration and Shock, 2023, 42(22): 241-247

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