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Comparison of Variational and Generalized Plane Strain approaches for matrix cracking in general symmetric laminates

Hajikazemi, M; McCarthy, LN (2018) Comparison of Variational and Generalized Plane Strain approaches for matrix cracking in general symmetric laminates. International Journal of Damage Mechanics, 27 (4). pp. 507-540.

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Abstract

The current research work is aimed at comparing stress-based Variational approach with Generalized Plane Strain (GPS) model for predicting stress transfer in cracked general symmetric laminates, subject to general in-plane loading. For each model, the fundamental assumptions made on stress and displacement fields, and also procedures for defining boundary conditions and finding solutions are detailed. Moreover, a numerical comparison has been made between the results obtained from two models with regard to stresses, displacements, and thermo-elastic constants of an unbalanced symmetric cracked laminate. Finally, the accuracy and quality of both approaches are examined by checking the satisfaction of known inter-relationships among thermo-elastic constants of cracked laminates. The paper extends an existing Variational model so that the effects of residual thermal stresses can be considered. It has been also shown how the displacement field can be determined for a stress-based Variational approach.

Item Type: Article
Keywords: Matrix cracking, stress transfer, stiffness reduction, Variational approach, Generalized Plane Strain approach
Subjects: Advanced Materials > Composites
Divisions: Engineering, Materials & Electrical Science
Identification number/DOI: 10.1177/1056789516685381
Last Modified: 21 Jun 2018 12:50
URI: http://eprintspublications.npl.co.uk/id/eprint/7972

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