WIT Press


Evaluation Of Local Fields In Damaged Composites

Price

Free (open access)

Paper DOI

10.2495/LD960371

Volume

13

Pages

8

Published

1996

Size

679 kb

Author(s)

J. Sejnoha, P. Prochazka & M. Sejnoha

Abstract

This paper deals with damage localized on interfaces between the fibres and the matrix in composite materials, which are often regarded as macro- scopically homogeneous solids with certain effective properties derived from information on phase properties and local geometry. This viewpoint is jus- tified only for loading conditions that do not impair the integrity of the microstructure. In this contribution we start with a survey of models de- scribing the transfer of elastic stresses from the matrix to the fiber. Then. the contact problems are formulated in a manner leading to a very fast Uzawa's algorithm (cf. [4]) for their solving. Debonding processes in the iriterfacial zone are illustrated by an example and discussed from the sta- bility standpoint. A simple solution of the overall response of

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