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Variational analysis of angle-ply laminates with parallel intralaminar cracks

Lookup NU author(s): Dr Vladimir VinogradovORCiD


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© 2015 International Committee on Composite Materials. All rights reserved. Stress redistribution in angle-ply laminates due to formation of intralaminar matrix cracks depends on the crack spatial distribution. Most of the existing approaches for stress analysis of a cracked laminate are either limited to cross-ply laminates or to symmetrical arrays of cracks. However, in many cases, either due to biaxial/complex loading or non-symmetrical layup, laminates form antisymmetric or staggered microcracks. A new variational stress analysis is suggested, when all the component of the stress tensor are assumed to be functions of the transverse direction as well. The in-plane stresses are assumed to be linear functions of the transverse coordinate. An admissible stress field is derived that satisfies equilibrium, boundary and traction continuity conditions. Using the principle of minimum complementary energy an optimal stress field is evaluated. The new analysis is applicable to any angle-ply laminate with parallel intralaminar cracks subjected to in-plane membrane forces and moments.

Publication metadata

Author(s): Vinogradov V

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: 20th ICCM International Conference on Composite Materials

Year of Conference: 2015

Pages: 1-8

Online publication date: 24/07/2015

Acceptance date: 01/01/1900

Publisher: International Committee on Composite Materials