Enhanced finite element formulation for geometrically linear fluid-saturated porous media

Papastavrou, A., Steinmann, P. and Stein, E. (1997) Enhanced finite element formulation for geometrically linear fluid-saturated porous media. Mechanics of Cohesive-Frictional Materials, 2(3), pp. 185-203. (doi:10.1002/(SICI)1099-1484(199707)2:3<185::AID-CFM21>3.0.CO;2-V)

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Abstract

This contribution is concerned with a new mixed finite element formulation for geometrically linear Terzaghi-Biot type fluid-saturated porous media. To this end, an extended Hu-Washizu type mixed variational principle is presented for fluid-saturated porous continua. Then, a suitable discretization and its implementation are discussed, resulting in an improved element behaviour especially in numerical localization analyses. The intriguing element performance is firstly demonstrated for the case of localization within an elastoplastic compression problem. Finally, an elastoplastic slope stability problem is examined, whereby the new element formulation proves to render more pronounced failure modes as compared with a standard element expansion.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Steinmann, Professor Paul
Authors: Papastavrou, A., Steinmann, P., and Stein, E.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
Journal Name:Mechanics of Cohesive-Frictional Materials
Publisher:Wiley
ISSN:1082-5010
ISSN (Online):1099-148
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