Abstract
Metamaterials are the class of man-made cellular structures that are intended to improve the energy absorption ability without an expense on its weight. The current investigation focuses on modeling and compressive simulation of three types of basic metamaterial (i.e Diamond, Auxetic and Hexagon) and its hybrids (i.e Auxetic-diamond, Auxetic-hexagon and Diamond-hexagon) with Ansys 19 simulation software. All the six auxetic metamaterials are simulated by assuming Polylactic Acid (PLA) material. At 0.1 MPa the maximum equivalent von-Mises stress was evident during the compressive analysis of auxetic-diamond hybrid structure. For auxetic-diamond hybrid structure higher energy absorption of 40 mJ was noted. It was observed to decrease by 67, 62, 75, 25 and 40% for auxetic, diamond, hexagon, auxetic-hexagon and diamond-hexagon respectively. The higher value of equivalent von-Mises stress and higher energy absorption is a manifestation of stiffest structure. The deformation results during simulation test confirmed that the basic auxetic structure and its hybrid absorb more energy. The hybrid auxetic metamaterials are the new class structural elements that exhibited extraordinary energy absorption ability.
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