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Challenges in the constitutive modeling of the thermo-mechanical deformation and damage behavior of EUROFER 97 by J. Aktaa; C. Petersen is a Engineering article available to read on EtoBox.

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EUROFER 97, reduced activation ferritic martensitic (RAFM) steel, is a candidate as structural material for plasma facing components of future fusion reactors where it will be subjected to complex thermo-mechanical loading and high irradiation doses. Correct modeling of its deterioration under these loading conditions is a precondition of a sufficiently reliable lifetime prediction procedure. Therefore a coupled deformation damage model taking into account its complex non-saturating cyclic softening has been developed and successfully applied to describe its creep-fatigue behavior under isothermal cyclic loading. The model has been implemented in the finite element code ABAQUS allowing best estimation of the mechanical behavior of real structures built from EUROFER 97. For verification the implementation has been applied to thermo-mechanical fatigue tests performed on tube specimens. Previous evaluation of these tests showed that thermo-mechanical fatigue loading leads to remarkably reduced lifetime in comparison to isothermal fatigue loading with the same mechanical strain range. In this evaluation changes in the stress range as well as actual test conditions, e.g. temperature gra

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Author

J. Aktaa; C. Petersen

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0013-7944)

Published

2009

Language

EN

Field

Engineering (Physical Sciences)