Abstract
AbstractMan-made auxetic structures improve mechanical properties and energy absorption ability of structure without any weight penalty. Both these properties of structures are highly suitable for sports gear in view to reduce weight reduction of safety items for players without burden on their body. The objective of this paper is to design and simulate effective auxetic structures for improved sports gear to absorb high impact energy. Three types of structures based on diamond, honeycomb and re-entrant auxetic structures are used for analysis. Based on positive and negative aspects of each selected auxetic structures, three hybrid auxetic structures are considered for protective gears. The value of equivalent von-Mises stresses and specific energy absorption of diamond and re-entrant is found to be higher than any other sample structure. Higher the value of equivalent von-Mises stress, higher will be the stiffness. Hence, hybrid structure of diamond and re-entrant may provide better protection than conventional open cell polyethane foam based sports protective gears.KeywordsEnergy absorptionEquivalent von-Mises stressRelative density
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