Table of Contents
Journal of Structures
Volume 2014 (2014), Article ID 147578, 8 pages
Research Article

Prediction of Progressive Failure Behaviour of Composite Skewed Hypar Shells Using Finite Element Method

Civil Engineering Department, Jadavpur University, Kolkata 700032, India

Received 19 May 2014; Accepted 20 August 2014; Published 16 September 2014

Academic Editor: Hanxing Zhu

Copyright © 2014 Arghya Ghosh and Dipankar Chakravorty. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Progressive failure behaviour of laminated composite skewed hypar shells is investigated in this paper through finite element approach. For composite materials which are weak in transverse shear, failure may initiate at any inner lamina or interface and may remain undetected and unattended to. Such latent damages may progress gradually and lead to a sudden total ply failure. An iterative method is adopted using the various failure theories to predict the first ply failure load. After the first ply failure, the stiffness of the failed element is totally discarded from the laminate and the remaining laminate is considered for further analysis. The developed finite element code is validated through solution of a benchmark problem. Numerical experiments are carried out to obtain the first ply and progressive failure of simply supported hypar shells under transverse distributed load. While obtaining the failure loads, the shell is considered to be under plane stress condition and in linear elastic range. Results are studied meticulously to extract a set of conclusions of practical significance regarding the failure characteristics of composite hypar shells.