Computational Modelling For Rapid Creep Life Assessment And Post-critical Behaviour
Author(s)
E. Bellenger & P. Coorevits
Abstract
Computational modelling for rapid creep life
assessment and post-critical behaviour
E. Bellenger & P. Coorevits
LMCAO, Universite de Picardie, lUTde VAisne, France
Abstract
In this paper a macroscopic modelling of creep behaviour is proposed. Back-
stress models within unified formulation are used for numerical simulations
of primary and secondary creep periods, associated with a scalar damage
variable and nonlinear geometrical effects for tertiary creep description.
These models have been implemented in finite element code. We will de-
scribe different modes of damage development and we will verify the very
different early crack growth behaviour exhibited by different structures. For
the numerical treatment, we propose to use the LATIN method in a version
adapted to solve problems with geometrical nonlinearities. This method
describes primary and secondary creep periods in a few large time incre-
ments to reach swiftly the tertiary creep period. If creep life assessm
Keywords
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