Published in Computational Mechanics Vol. 15 (6), pp. 572-593, 1995
doi: 10.1007/BF00350269

Abstract

In this paper the general non symmetric parametric form of the incremental secant stiffness matrix for non linear analysis of solids using the finite element metod is derived. A convenient symmetric expression for a particular value of the parameters is obtained. The geometrically non linear formulation is based on a Generalized Lagrangian approach. Detailed expressions of all the relevant matrices involved in the analysis of 3D solids are obtained. The possibilities of application of the secant stiffness matrix for non linear structural problems including stability, bifurcation and limit load analysis are also discussed. Examples of application are given for the non linear analysis of pin joined frames.

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Published on 01/01/1995

DOI: 10.1007/BF00350269
Licence: CC BY-NC-SA license

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