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Numerical Analysis and Experimental Validation of Interlaminar Stresses of Quasi-isotropic APC-2/AS-4 Laminate with a Central Hole Loaded in Tension

Department of Mechanics, Tianjin University, Tianjin, P. R. China

^* To whom correspondence should be addressed. E-mail: cea_zhaogh{at}ujn.edu.cn.

	Abstract

This article addresses the distributions of interlaminar stresses of centrally notched quasi-isotropic APC-2/AS-4 laminate ([0/±45/90]_2s) in tension by finite element method (FEM). Results include the concentration of interlaminar stresses in the vicinity of free boundaries (including hole edge and free sides); The concentration of interlaminar shear stress dominates at interfaces of -45°/+45° and +45°/0°, and the concentration of interlaminar normal stress, which occurs at the 90°/-45° and 0°/90° interfaces. Further analysis demonstrates that the concentration of interlaminar shear stress is more severe as a whole and the highest interlaminar shear stress occurs near the hole edge. The results of digital speckle correlation measurement experiment validate the FEM result.

First published on September 9, 2009
Journal of Thermoplastic Composite Materials 2009, doi:10.1177/0892705709344563


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