Abstract
A new continuum damage mechanics (CDM) based model for describing cyclic creep behavior of selected engineering materials under complex thermal-mechanical loading conditions is incorporated into a finite element computer code for cyclic creep fracture analysis. A mixed explicit-implicit (EI) algorithm was used to deal with the evolution of creep damage in the material. Three case studies were conducted on a cracked thin panel made of 316L stainless steel. Loading conditions for these case studies correspond to static, cyclic without dwell time and cyclic with dwell time, respectively. Mechanical load and temperature changes applied in phase with each other are considered in this investigation. Numerical results indicate that both the load dwell time and the loading/unloading cycling process have profound influence on subsequent creep behavior.
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