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자료유형
학술저널
저자정보
저널정보
대한기계학회 대한기계학회 논문집 A권 대한기계학회논문집 A권 제28권 제10호
발행연도
2004.10
수록면
1,603 - 1,611 (9page)

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The validity of 'modified overlay model' to describe the cyclic behavior of annealed 316L stainless steel at room temperature was investigated. Material parameters (f,m, ,b, Π,E) for the model were obtained through constant strain amplitude test. The strain amplitude dependency of elastic limit and cyclic hardening, which were the characteristics of this model, were considered. Eight subelements were used to describe the nonlinearity of the hysteresis loops. The calculated hysteresis curve in each condition (0.5%, 0.7%, 0.9% strain amplitude test) was very close to the experimental one. Two tests, incremental step test and 5-step test, were performed to check the validity of 'modified overlay model'. The elastic limit was saturated to the one of the highest strain amplitudes of the block in the incremental step test, so it seemed to be Masing material at the stabilized block. Cyclic hardening was successfully described in the increasing sequence of the strain amplitude in 5-step test. But, the slight cyclic softening followed by higher strain amplitude would not be able to simulate by 'modified overlay model'. However, the discrepancy induced was very small between the calculated hystereses and the experimental ones. In conclusion, 'Modified overlay model' was proved to be appropriate in strain range of 0.35%~1.0%.

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3. 반복 거동의 모델링

4. 결론

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