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APPLICATION OF APPROXIMATE LAPLACE TRANSFORM INVERSION FOR PROBLEMS OF PLANE STRAIN IN VISCOELASTIC ORTHOTROPIC COMPOSITE MATERIALS

Ngo Thanh Phong 1
Nguyen Thoi Trung 1
Nguyen Dinh Hien 1
Volume & Issue: Vol. 7 No. 4&5 (2004) | Page No.: 5-13 | DOI: 10.32508/stdj.v7i4&5.3189
Published: 2004-05-31

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Copyright The Author(s) 2023. This article is published with open access by Vietnam National University, Ho Chi Minh city, Vietnam. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0) which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited. 

Abstract

The paper presents approximate methods for the calculation of the stress distribution in a bollow cylinder of orthotropic viscoelastic composite materials under internal and external pressure. From the elastic solution the correspondence principe is appied to find the solution of associate elastic problem. Then three approximate methods: the collocation method, the direct method and the quasi-elastic method, are used to calculate the viscoelastic solution.

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