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The Anisotropic Yield Surface of Cellular Materials release_g6kc5j5rnjdydjpjakopyrjp2u

by Kaitlynn M. Conway, Zachary Romanick, Lea M. Cook, Luis A. Morales, Jonathan D. Despeaux, Marcus L. Ridlehuber, Christian Fingar, Daquan Doctor, Garrett J. Pataky, Austin, The University Of Texas At

Published by University of Texas at Austin.

2021  

Abstract

Mechanical metamaterials are often limited in engineering applications because of uncertainty in their deformation behavior. This uncertainty necessitates large factors of safety and behavior assumptions to be included in mechanical metamaterial designs, detracting from the largest benefit of metamaterials: their ultralight weight. In this study, a yield envelope was created for both a bending dominated and a stretching dominated cellular material topology to improve the understanding of the response of cellular materials under various load types and orientations. Experimental studies revealed that the shear strength of a cellular material is significantly less than that predicted by the Mohr's criterion, necessitating a modification of the Mohr's yield criterion for cellular materials. Both topologies experienced tension-compression anisotropy and anisotropy dependent on the topology orientation during loading with the stretching dominated topology experiencing the largest anisotropies.
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Type  article
Stage   published
Date   2021-11-30
DOI  10.26153/tsw/17489
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