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International Journal for Multiscale Computational Engineering
IF: 1.016 5-Year IF: 1.194 SJR: 0.452 SNIP: 0.68 CiteScore™: 1.18

ISSN Print: 1543-1649
ISSN Online: 1940-4352

International Journal for Multiscale Computational Engineering

DOI: 10.1615/IntJMultCompEng.v6.i5.60
pages 469-481

Postbuckling of Layered Composites by Finite Strain Micromechanical Analysis

Rivka Gilat
Department of Civil Engineering, Faculty of Engineering, Ariel University Center, Ariel 44837, Israel
Jacob Aboudi
Faculty of Engineering, Tel Aviv University, Ramat Aviv 69978, Israel

ABSTRACT

A finite deformation micromechanical analysis that includes the effect of initial geometrical imperfection is formulated and employed to demonstrate its capability to predict the mechanical and thermal postbuckling of periodic bilayered composites. This micromechanical model, is based on the analysis of doubly periodic composites in conjunction with the homogenization technique. The field equations are modified to incorporate the effect of initial wavy imperfection, which is essential for development and analysis of the postbuckling phenomenon. Nonlinear, compressible neo-Hookean law is adopted for representing the behavior of the composites constituents. The offered approach is employed to predict the postbuckling behavior of layered composites under compressive mechanical loading. In addition, the possibility of the occurrence of postbuckling as a result of thermal stresses developing during the application of a temperature drop is examined.


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