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논문 기본 정보

자료유형
학술저널
저자정보
김유일 (인하대학교) 김경수 (인하대학교)
저널정보
대한조선학회 대한조선학회 논문집 대한조선학회논문집 제50권 제1호
발행연도
2013.2
수록면
41 - 48 (8page)

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초록· 키워드

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Several fatigue damages have recently been reported which cannot be resolved in the context of the existing fatigue design procedure, and they are suspected to be the cracks induced by the low cycle fatigue mechanism. To tackle the problem, a series of material tests together with fatigue tests have been carried out, and elasto-plastic notch strain analysis using nonlinear kinematic hardening model has been performed. The cyclic stress-strain curves are obtained and the nonlinear kinematic hardening model was calibrated based on the obtained material data. Also, the fatigue test with non-load-carrying cruciform fillet welded joint has been performed in low cycle fatigue regime. Then, the notch strain analyses have been carried out to find the precise elasto-plastic behavior of the material at the notch root of the cruciform joint. The variation of the material property from the base metal via HAZ up to the weld metal was taken into account using spatial variation of the material property. Then the detail elasto-plastic behavior of the welded joint subjected to the repeated cyclic loading has been investigated further through the comparison with the prediction with Neuber’s rule. The calibration of the nonlinear kinematic hardening model and nonlinear notch strain analyses have been performed using the commercial FE program ABAQUS.

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3. 비선형 이동 경화모델
4. 저싸이클 피로시험
5. 노치 응력해석
6. 결론
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UCI(KEPA) : I410-ECN-0101-2014-559-000336366