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Thermal Stress Calculations Using Enhanced Green's Function Considering Temperature-dependent Material Properties
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 Title & Authors
Thermal Stress Calculations Using Enhanced Green's Function Considering Temperature-dependent Material Properties
Han, Tae-Song; Huh, Nam-Su; Jeon, Hyun-Ik; Ha, Seung-Woo; Cho, Sun-Young;
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We propose an enhanced Green's function approach to predict thermal stresses by considering temperature-dependent material properties. We introduce three correction factors for the maximum stress, the time taken to reach maximum stress, and the time required to attain steady state based on the Green's function results for each temperature. The proposed approach considers temperature-dependent material properties using correction factors, which are defined as polynomial expressions with respect to temperatures based on Green's functions, that we obtain from finite-element (FE) analyses at each temperature. We verify the proposed approach by performing detailed FE analyses on thermal transients. The Green's functions predicted by the proposed approach are in good agreement with those obtained from FE analyses for all temperatures. Moreover, the thermal stresses predicted using the proposed approach are also in good agreement with the FE results, and the proposed approach provides better predictions than the conventional Green's function approach using constant, time-independent material properties.
Green's function;Fatigue damage;Temperature-dependent material property;Thermal stress analysis;
 Cited by
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