Title page for ETD etd-0708102-185912


Type of Document Master's Thesis
Author Araujo, Marcio Costa
Author's Email Address marauj1@lsu.edu
URN etd-0708102-185912
Title Non-Linear Kinematic Hardening Model for Multiaxial Cyclic Plasticity
Degree Master of Science in Civil Engineering (M.S.C.E.)
Department Civil and Environmental Engineering
Advisory Committee
Advisor Name Title
George Z. Voyiadjis Committee Chair
Su-Seng Pang Committee Member
Wen Jin Meng Committee Member
Keywords
  • isotropic
  • hardening models
  • plasticity in metals
  • deviatoric stress
  • yield surfaces
  • kinematic
Date of Defense 2002-04-18
Availability unrestricted
Abstract
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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