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Paper IV.4

Alternative Approach for Hybrid Stress Elements with Incompatible Displacements

Y.F. Dong and J.A. Teixeira de Freitas

Departmenta de Engenharia Civil, Universidade Tecnica de Lisboa, Lisbon, Portugal

doi:10.4203/ccp.19.4.4

Y.F. Dong, J.A. Teixeira de Freitas, "Alternative Approach for Hybrid Stress Elements with Incompatible Displacements", in B.H.V. Topping, (Editor), "Developments in Computational Engineering Mechanics", Civil-Comp Press, Edinburgh, UK, pp 99-105, 1993. doi:10.4203/ccp.19.4.4

Abstract

An alternative approach for the formulation of hybrid stress elements is presented. A modified Hellinger-Reissner principle is used to relax the patch test under distorted meshes. Interpolation on isoparametric coordinates is used in both displacement and stress. The stress distribution is obtained by tensor transformation on some stress terms. Based on this approach, a 4-node planar element and a 8-node solid element are developed. Numerical testing enhances the good performance of these hybrid stress elements in the estimation of both stresses and displacements in elastostatic problems.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 19 DEVELOPMENTS IN COMPUTATIONAL ENGINEERING MECHANICS Edited by: B.H.V. Topping Paper IV.4 Alternative Approach for Hybrid Stress Elements with Incompatible Displacements Y.F. Dong and J.A. Teixeira de Freitas Departmenta de Engenharia Civil, Universidade Tecnica de Lisboa, Lisbon, Portugal doi:10.4203/ccp.19.4.4 purchase the full-text of this paper Full Bibliographic Reference for this paper Y.F. Dong, J.A. Teixeira de Freitas, "Alternative Approach for Hybrid Stress Elements with Incompatible Displacements", in B.H.V. Topping, (Editor), "Developments in Computational Engineering Mechanics", Civil-Comp Press, Edinburgh, UK, pp 99-105, 1993. doi:10.4203/ccp.19.4.4 Abstract An alternative approach for the formulation of hybrid stress elements is presented. A modified Hellinger-Reissner principle is used to relax the patch test under distorted meshes. Interpolation on isoparametric coordinates is used in both displacement and stress. The stress distribution is obtained by tensor transformation on some stress terms. Based on this approach, a 4-node planar element and a 8-node solid element are developed. Numerical testing enhances the good performance of these hybrid stress elements in the estimation of both stresses and displacements in elastostatic problems. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £58 +P&P)
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