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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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초록· 키워드
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Stress triaxiality is recognized as one of the most important factors for predicting the failure strain of ductile metals. This study dealt with the effect of the average stress triaxiality on the failure strain of a typical low-temperature high-strength marine structural steel, EH36. Tensile tests were carried out on flat specimens with different notches, from relatively smooth to very sharp levels. Numerical simulations of each specimen were performed by using ABAQUS. The failure initiation points in numerical simulations were identified from a comparison of the engineering stress vs. strain curves obtained from experiments with simulated ones. The failure strain curves for various dimensionless critical energy levels were established in the average stress triaxiality domain and compared with the identified failure strain points. It was observed that most of the failure initiation points were approximated with a 100% dimensionless critical energy curve. It was concluded that the failure strains were well expressed as a function of the average stress triaxiality.
목차
ABSTRACT
1. 서론
2. 인장 실험
3. 수치해석
4. 파단 변형률의 정식화
5. 결론
참고문헌
참고문헌 (18)
참고문헌 신청
1. [보고서] - American Society for Testing and Materials(ASTM) / 2004 / E8-04 Standard Test Methods for Tension Testing of Metallic Materials
2. [학술지(정기간행물)] - Bai, Y. / 2008 / A New Model of Metal Plasticity and Fracture with Pressure and Lode Dependence / International Journal of Plasticity 24 : 1071 ~ 1096
3. [학술지(정기간행물)] - Bai, Y. / 2010 / Application of Extended Mohr-Coulomb Criterion to Ductile Fracture / International Journal of Fracture 161 : 1 ~ 20
4. [학술지(정기간행물)] - Bao, Y. / 2004 / On Fracture Locus in the Equivalent Strain and Stress triaxiality space / International Journal of Mechanical Sciences 46 : 81 ~ 98
5. [학술지(정기간행물)] - Beese, A. M. / 2011 / Effect of Stress Triaxiality and Lode Angle on the Kinetics of Strain-Induced Austeniteto-Martensite Transformation / Acta Materialia 59 (7) : 2589 ~ 2600
2. [학술지(정기간행물)] - Bai, Y. / 2008 / A New Model of Metal Plasticity and Fracture with Pressure and Lode Dependence / International Journal of Plasticity 24 : 1071 ~ 1096
3. [학술지(정기간행물)] - Bai, Y. / 2010 / Application of Extended Mohr-Coulomb Criterion to Ductile Fracture / International Journal of Fracture 161 : 1 ~ 20
4. [학술지(정기간행물)] - Bao, Y. / 2004 / On Fracture Locus in the Equivalent Strain and Stress triaxiality space / International Journal of Mechanical Sciences 46 : 81 ~ 98
5. [학술지(정기간행물)] - Beese, A. M. / 2011 / Effect of Stress Triaxiality and Lode Angle on the Kinetics of Strain-Induced Austeniteto-Martensite Transformation / Acta Materialia 59 (7) : 2589 ~ 2600
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UCI(KEPA) : I410-ECN-0101-2014-550-003649649