The extended GLOSS method of analysis has been presented here that leads to conservative bounds on inelastic local strains. Consequently, the local region constraint parameter λ¯ is determined which can be used to evaluate multiaxial stress relaxation, creep damage, low-cycle fatigue, and elastic-plastic fracture. The method is used to determine inelastic local strains for several component configurations, subjected to mechanical as well as thermal loadings, and then compared with the corresponding inelastic FEA results. [S0094-9930(00)00404-2]
Mechanical components and structures loaded into inelastic region can fail by low cycle fatigue (LCF). Evaluation of inelastic strain is an important stage in the LCF life prediction methodology. Different techniques, viz., experimental methods, elastic-plastic finite element analysis (FEA), and robust methods, can be used to predict inelastic strains. The state predicted by available robust methods does not correspond to equilibrium state of the component. A method called MARS (modulus adjustment and redistribution of stress) based on linear elastic FEA has been developed to obtain equilibrium and kinematic distributions close to the actual one. The proposed method uses an iterative strategy combined with a modulus reduction technique.
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