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Numerical failure modeling of composite structures

Numerical failure modeling of composite structures
Numerical failure modeling of composite structures

This thesis is concerned with the damage assessment of composite structures under static loading case with geometric non-linearity. Both the finite element method and the boundary element method are studied for this purpose. A finite element based computational damage model is developed for predicting the nonlinear response, first-ply failure and ultimate collapse strength of uni-directional laminated composite plates. The damage model is implemened into the finite element program ABAQUS. It contains theory of large deformation and large strain. The model is then extended to laminated composite structures with woven fabric piles. A simplified model is developed for prediction of stiffness properties of woven fabric composite plates. In both the cases numerical results are compared against test values. It is demonstrated that excellent correlation with experimental results can be achieved. In the context of the boundary element method (BEM) the present research focuses on stress analysis of 2-D orthotropic structures. A novel technique is proposed for accurately computing the singular integrals in the 2-D boundary element method.

University of Southampton
Padhi, Gouri Sankar
Padhi, Gouri Sankar

Padhi, Gouri Sankar (2000) Numerical failure modeling of composite structures. University of Southampton, Doctoral Thesis.

Record type: Thesis (Doctoral)

Abstract

This thesis is concerned with the damage assessment of composite structures under static loading case with geometric non-linearity. Both the finite element method and the boundary element method are studied for this purpose. A finite element based computational damage model is developed for predicting the nonlinear response, first-ply failure and ultimate collapse strength of uni-directional laminated composite plates. The damage model is implemened into the finite element program ABAQUS. It contains theory of large deformation and large strain. The model is then extended to laminated composite structures with woven fabric piles. A simplified model is developed for prediction of stiffness properties of woven fabric composite plates. In both the cases numerical results are compared against test values. It is demonstrated that excellent correlation with experimental results can be achieved. In the context of the boundary element method (BEM) the present research focuses on stress analysis of 2-D orthotropic structures. A novel technique is proposed for accurately computing the singular integrals in the 2-D boundary element method.

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Published date: 2000

Identifiers

Local EPrints ID: 466969
URI: http://eprints.soton.ac.uk/id/eprint/466969
PURE UUID: dc5d16bf-b99c-4cd7-aeae-9cd80fec00bb

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Date deposited: 05 Jul 2022 08:04
Last modified: 05 Jul 2022 08:04

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Contributors

Author: Gouri Sankar Padhi

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