Master of Science in Civil Engineering (MSCE)
Civil and Environmental Engineering
A model of kinematic work hardening based on Frederick and Armstrong (1966), Phillips and Weng (1975), Chaboche (1979), and Voyiadjis and Basuroychowdhury (1998) is proposed for metal like behavior materials. In this proposed model, ratcheting is taken into account through the observation of the backstress evolution equation, modified by the addition of a new term, . Experimental observations made by Phillips and Lee (1979) showed that the direction of the movement of the center of the yield surface occurs in between the stress rate tensor and the plastic strain rate tensor directions. The new term, added to Chaboche model (1979), will account for these experimental observation. The model is tested for uniaxial monotonic, cyclic loadings, and for ratcheting prediction. The results obtained are analyzed and compared to existing hardening models and experimental results.
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Araujo, Marcio Costa, "Non-linear kinematic hardening model for multiaxial cyclic plasticity" (2002). LSU Master's Theses. 1650.
George Z. Voyiadjis