The Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics
Online ISSN : 2424-2837
2003.2
Session ID : GSW0454
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GSW0454 Microscopic buckling and macroscopic instability of periodic cellular solids
Dai OkumuraNobutada OhnoHirohisa Noguchi
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Abstract
Microscopic buckling and macroscopic instability of periodic cellular solids under uniaxial, as well as biaxial, compression are studied. To this end, a general framework of microscopic bifurcation and post-bifurcation analysis is established on the basis of an updated Lagrangian type, two-scale theory. Using the framework, cell aggregates of an elastoplastic honeycomb subject to in-plane compression are analyzed. We thus demonstrate the dependence of microscopic bifurcation on periodic length, the inherent multiplicity of long-wave microscopic bifurcation, the localizations of microscopic buckling in a cell row and in deltaic areas, and the change into an asymmetric, long-wave mode under equi-biaxial compression.
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© 2003 The Japan Society of Mechanical Engineers
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