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Computational Mechanics

, Volume 15, Issue 6, pp 572–593 | Cite as

On the derivation and possibilities of the secant stiffness matrix for non linear finite element analysis

  • E. Oñate
Originals

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.

Keywords

Information Theory Finite Element Analysis Linear Formulation Stiffness Matrix Parametric Form 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • E. Oñate
    • 1
  1. 1.E. T. S. Ingenieros de Caminos, Canales y PuertosUniversidad Politécnica de CataluñaBarcelonaSpain

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