Deformation and Mechanical Behavior of Torsional Energy Absorbing Structures Constructed by Folding Creases

doi:10.3901/JME.2022.17.125

Abstract

Abstract: Origami structures have received wide attention in the past few years, and the developed origami geometry has become a branch of modern geometry. Different from the traditional origami design method using facets, the proposed mechanical metamaterial truss structures with the creases in origami structures are used as new torsional energy absorption devices. The effects of different geometric design parameters on the torsional deformation and mechanical responses of the mechanical metamaterial structures are investigated based on experiments, theoretical and finite element simulation methods, and the different energy absorption properties of contact and non-contact structures during compression are further explored. Results show that the structural torsion angle can be increased by increasing the height or decreasing the radius of the truss structure. The Young's modulus of the structure can be increased by decreasing the height, increasing the initial angle or increasing the side number of truss structure. Negative stiffness can be introduced by decreasing the height and the initial angle or increasing the radius of the truss structure and the side number of truss structure. Reducing the height, initial angle, radius of truss or increasing the side number can increase the value of energy absorption. The proposed mechanical metamaterial structures are expected to be applied in the fields of aerospace, mechanical engineering, automobile manufacturing and so on.

Key words: origami, metamaterials, energy absorption, truss, compression-twist

CLC Number:

TH112

SONG Yifan, YANG Nan. Deformation and Mechanical Behavior of Torsional Energy Absorbing Structures Constructed by Folding Creases[J]. Journal of Mechanical Engineering, 2022, 58(17): 125-134.

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http://www.cjmenet.com.cn/EN/Y2022/V58/I17/125

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