Analytical and finite element modelling of buckling and post-buckling of delaminated opthotropic plates

Chattopadhyay, Lalitha and Murthy, Sridhara S and Mahesh, H (2008) Analytical and finite element modelling of buckling and post-buckling of delaminated opthotropic plates. In: Proceedings of the International Conference on Aerospace Science and Technology (INCAST 2008-079), 26-28 Jun 2008, Bangalore, India.

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Abstract

Delamination is one of the most common failure modes of laminated composite materials, and can be caused by manufacturing defects or impact loading. Under compression, a delaminated composite plate may buckle and tend to enlarge the delaminated area, which can lead to loss of global structural stability. This paper presents the elastic buckling and post-buckling analysis of an axially loaded beam-plate with an across-the-width delamination, located at a given depth below the upper surface of the plate. The analysis is done by considering a layered orthotropic plate containing through-width delamination, subjected to in-plane compression. The problem is analyzed by two approaches: (i) Through an analytical model using Fourier integral transform for determining the strain energy release rate and (ii) Through a finite element representation of the problem using MSC/ NASTRAN and where the buckling load is computed.

Item Type:	Conference or Workshop Item (Paper)
Additional Information:	Copyright for this article belongs to National Aerospace Laboratories
Uncontrolled Keywords:	Orthotropic plates;Composite materials
Subjects:	AERONAUTICS > Aeronautics (General) CHEMISTRY AND MATERIALS > Composite Materials
Depositing User:	Ms. Alphones Mary
Date Deposited:	11 Mar 2009
Last Modified:	17 Jun 2010 09:07
URI:	http://nal-ir.nal.res.in/id/eprint/5011

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