Large deflection initial failure analysis of angle-ply laminated plates

• Published in: Composite structures Vol. 25; no. 1; pp. 529 - 539
• Main Authors: Turvey, G.J., Osman, M.Y.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.01.1993
• ISSN: 0263-8223; 1879-1085
• DOI: 10.1016/0263-8223(93)90201-Z

A large deflection initial failure analysis of square angle-ply laminated plates subjected to uniform pressure loading is described. Approximate numerical solutions of the Mindlin laminated plate equations are derived using finite differences in conjunction with the Dynamic Relaxation (DR) technique. The solutions are scaled to satisfy the Tsai-Hill lamina failure criterion. The effects of plate slenderness, in-plane edge restraint and lay-up on the initial failure pressure and associated plate centre deflection are quantified for ±45° laminated plates with simply supported and clamped edges. It is shown, particularly for thin plates, that in-plane edge restraint increases the initial failure pressure substantially, though changing the plate edge conditions from simply supported to clamped does not always increase the initial failure pressure.