Numerical implementation of a multiaxial cyclic plasticity model for the Local Strain Method in low cycle fatigue
Very often computations on structural elements or machine components subjected to variable loading require using an advanced finite element model. This paper reports the numerical implementation of a model for multiaxial cyclic elasticplastic behaviour developed to extend the tools of the local de...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Gruppo Italiano Frattura
2014-10-01
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| Series: | Fracture and Structural Integrity |
| Subjects: | |
| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero30/numero_30_art_20.pdf |
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| Summary: | Very often computations on structural elements or machine components subjected to variable
loading require using an advanced finite element model. This paper reports the numerical implementation of a
model for multiaxial cyclic elasticplastic behaviour developed to extend the tools of the local deformation
method under fatigue to multiaxial conditions. A basic computer code for axialtorsional loads was developed
with the commercial software Matlab and a more sophisticated code based on the finite element model for
general multiaxial loads was developed as a UMAT subroutine in Abaqus. Stress integration was introduced in
the two usual forms: implicitly and explicitly. A comparison of the results obtained with the implicit and explicit
formulations revealed that, under certain loading conditions, the outcome of the process depends on the
particular integration scheme used. |
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| ISSN: | 1971-8993 1971-8993 |