Probabilistic strength based matrix crack evolution in multi-directional composite laminates

Jagannathan, N and Gururaja, S and Manjunatha, CM (2016) Probabilistic strength based matrix crack evolution in multi-directional composite laminates. In: COMPOSITES PART B-ENGINEERING, 87 . pp. 263-273.

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Abstract

Matrix cracking is the first and most dominant mode of damage in laminated polymer composites resulting in significant stiffness degradation. In the past, matrix cracking has been quantified using crack density evolution with loading and correlating the crack densities with stiffness degradation of the laminate. In the present study, an analytical framework for matrix crack evolution for a general Multi Directional (MD) symmetric laminate has been proposed using oblique coordinate based shear-lag analysis coupled with a probabilistic strength approach. The statistical parameters have been estimated from a master laminate. The ply-by-ply crack density evolution has also been simulated. The crack density evolution and associated stiffness degradation predictions have been compared to existing experimental values. The stiffness degradation trends closely match with experimental data and stiffness values estimated from current approach are conservative. (C) 2015 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	COMPOSITES PART B-ENGINEERING
Publisher:	ELSEVIER SCI LTD
Additional Information:	Copy right for this article belongs to the ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Keywords:	A. Polymer-matrix composites (PMCs); B. Damage tolerance; C. Analytical modelling; Matrix cracking
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	11 Jun 2016 09:04
Last Modified:	11 Jun 2016 09:04
URI:	http://eprints.iisc.ac.in/id/eprint/53982

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