Analytical 1D Model of Delamination Development and Strength of Layered Composite Beam in Post-Buckling

Abstract:

1D nonlinear model of a thin plate (or beam) with delamination was developed earlier. Large deflections and membrane strains of a plate in buckled state, as well as the strain energy described using elliptic integrals. The Griffith-type energy condition was used as a criteria of delamination propagation. The analysis of the destruction of the plate was performed depending on the geometrical dimensionless parameters of a plate and the material strength performance. Here the mentioned model is extended to the general mode of delamination and it allows to describe the post-buckling stage and damage propagation. Model application as a base for the alternative determination of the interlaminar fracture toughness of the layered composites is indicated.

• Periodical: Key Engineering Materials (Volume 627)
• Pages: 325-328
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.627.325
• Online since: September 2014
• Authors: Vitalijs Pavelko*
• Keywords: Compressive Strength, Delamination, Layered Composite Beam, Post-Buckling

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