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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 32
DEVELOPMENTS IN COMPUTATIONAL TECHNIQUES FOR CIVIL ENGINEERING
Edited by: B.H.V. Topping
Paper X.2

Finite Element Modelling of Elasto-Viscoplastic Large Deformations of Polymeric Structures

Z.W. Guan* and J.C. Boot#

*Department of Civil Engineering, University of Brighton, Brighton, UK
#Department of Civil Engineering, University of Bradford, Bradford, UK

Full Bibliographic Reference for this paper
Z.W. Guan, J.C. Boot, "Finite Element Modelling of Elasto-Viscoplastic Large Deformations of Polymeric Structures", in B.H.V. Topping, (Editor), "Developments in Computational Techniques for Civil Engineering", Civil-Comp Press, Edinburgh, UK, pp 279-289, 1995. doi:10.4203/ccp.32.10.2
Abstract
Installation of a tight fitting Medium Density Polyethylene (MDPE) lining is one of the most advantageous renovation techniques for leaking cast/ductile iron water mains. Both material and physical tests show that MDPE is a time-dependent and extremely ductile material. A finite element simulation of the lining being extruded through a corrosion void in the host pipe under a constant internal pressure is obtained. The model incorporating a suitably defined elasto-viscoplasticity allows for large deformations of the lining and frictional contact with the host pipe and is first calibrated against medium term creep tests up to rupture. Axisymmetrical and three-dimensional models are developed to achieve simple and complex simulations of the lining system.

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