TITLE

Solving hyperelastic material problems by asymptotic numerical method

AUTHOR(S)
Nezamabadi, Saeid; Zahrouni, Hamid; Yvonnet, Julien
PUB. DATE
January 2011
SOURCE
Computational Mechanics;Jan2011, Vol. 47 Issue 1, p77
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This paper presents a numerical algorithm based on a perturbation technique named asymptotic numerical method (ANM) to solve nonlinear problems with hyperelastic constitutive behaviors. The main advantages of this technique compared to Newton-Raphson are: (a) a large reduction of the number of tangent matrix decompositions; (b) in presence of instabilities or limit points no special treatment such as arc-length algorithms is necessary. The ANM uses high order series approximation with auto-adaptive step length and without need of any iteration. Introduction of this expansion into the set of nonlinear equations results into a sequence of linear problems with the same linear operator. The present work aims at providing algorithms for applying the ANM to the special case of compressible and incompressible hyperelastic materials. The efficiency and accuracy of the method are examined by comparing this algorithm with Newton-Raphson method for problems involving hyperelastic structures with large strains and instabilities.
ACCESSION #
57242517

 

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