Effect of material hardening model for canister on finite element cask drop simulation for strain-based acceptance evaluation
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초록
The effect of the material hardening model of the canister on a finite element vertical cask drop simulationis investigated for the strain-based acceptance evaluation. Three different hardening models areconsidered in this paper: the isotropic hardening model, the strain rate-dependent Johnson-Cook (J-C)hardening model, and the modified J-C model which are believed to be the most accurate. By comparingthe results using the modified J-C model, it is found that the use of the J-C model provides similar orlarger stresses and strains depending on the magnitudes of the strain and strain rate. The use of theisotropic hardening model always yields larger stresses and strains. For the strain-based acceptanceevaluation, the use of the isotropic hardening model can produce highly conservative assessment results. The use of the J-C model, however, produces satisfactory results.
Abstract
The effect of the material hardening model of the canister on a finite element vertical cask drop simulationis investigated for the strain-based acceptance evaluation. Three different hardening models areconsidered in this paper: the isotropic hardening model, the strain rate-dependent Johnson-Cook (J-C)hardening model, and the modified J-C model which are believed to be the most accurate. By comparingthe results using the modified J-C model, it is found that the use of the J-C model provides similar orlarger stresses and strains depending on the magnitudes of the strain and strain rate. The use of theisotropic hardening model always yields larger stresses and strains. For the strain-based acceptanceevaluation, the use of the isotropic hardening model can produce highly conservative assessment results. The use of the J-C model, however, produces satisfactory results.
참고문헌 (27)
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