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To predict a complete failure evolution process due to creep, the transition from creep damage to creep fracture is explored based on the moving jump forms of conservation laws. With the use of the strain-based rate-independent damage surface in a combined damage/viscoplasticity model, a continuum tangent stiffness tensor is formulated to identify the transition. It is shown that the rate-independent damage surface can predict the rate-dependency of limit stress. Sample problems are considered to illustrate the proposed procedure for simulating the failure evolution process due to creep.
To predict a complete failure evolution process due to creep, the transition from creep damage to creep fracture is explored based on the moving jump forms of conservation laws. With the use of the strain-based rate-independent damage surface in a combined damage/viscoplasticity model, a continuum tangent stiffness tensor is formulated to identify the transition. It is shown that the rate-independent damage surface can predict the rate-dependency of limit stress. Sample problems are considered to illustrate the proposed procedure for simulating the failure evolution process due to creep.
Investigation on the transition from creep damage to creep fracture
Fatigue and Fracture of Engineering Materials and Structures ; 21 ; 641-649
1998
9 Seiten, 16 Quellen
Article (Journal)
English
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