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Case study of the applicability of cyclic hardening material descriptions in finite element simulation of cyclic thermal shocks
Author(s) -
JANSSENS K. G. F.
Publication year - 2011
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.2010.01547.x
Subject(s) - finite element method , hardening (computing) , materials science , thermal , structural engineering , composite material , engineering , physics , thermodynamics , layer (electronics)
Finite element simulation of cyclic thermal loading induced fatigue can be used to predict the service time of components in industrial environments. Various damage criteria for low cycle fatigue have been developed, which require a temperature‐dependent description of the cyclic plastic hardening of the material. In these descriptions the shape of the stress‐strain loop is coupled to its cyclic evolution, which leads to problems under specific loading conditions and/or for materials not exhibiting a quick cyclic stabilization. The applicability of a basic, nonlinear kinetic–isotropic cyclic hardening description combined with an approach in which its parameters depend on the accumulated plastic strain and temperature is evaluated in a case study mimicking boundary conditions that occur in the primary cooling circuit of nuclear power plants. The model is calibrated with experimental data for a material that exhibits cyclic softening, requiring a modification of the hardening description.