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Formulation of Failure Strain according to Average Stress Triaxiality of Low Temperature High Strength Steel (EH36)
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 Title & Authors
Formulation of Failure Strain according to Average Stress Triaxiality of Low Temperature High Strength Steel (EH36)
Choung, Joonmo; Nam, Woongshik;
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 Abstract
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.
 Keywords
Average stress triaxiality;Equivalent plastic strain;Failure strain;Average true stress;
 Language
Korean
 Cited by
1.
상용 유한요소코드 사용자-서브루틴을 이용한 저온용 고장력강 (EH36)의 파단 시뮬레이션,정준모;남웅식;김영훈;

한국해양공학회지, 2014. vol.28. 1, pp.34-46 crossref(new window)
2.
극한지용 고장력강의 평균 응력 삼축비 및 평균 정규 로드 파라메터를 고려한 3차원 파단 변형률 평면 개발: 제2부 파단 변형률 평면의 정식화,정준모;박성주;김영훈;

한국해양공학회지, 2015. vol.29. 6, pp.454-462 crossref(new window)
3.
극한지용 고장력강의 평균 응력 삼축비 및 평균 정규 로드 파라메터를 고려한 3차원 파단 변형률 평면 개발: 제1부 이론적 배경과 실험적 연구,정준모;박성주;김영훈;

한국해양공학회지, 2015. vol.29. 6, pp.445-453 crossref(new window)
1.
Development of Three Dimensional Fracture Strain Surface in Average Stress Triaxiaility and Average Normalized Lode Parameter Domain for Arctic High Tensile Steel: Part I Theoretical Background and Experimental Studies, Journal of Ocean Engineering and Technology, 2015, 29, 6, 445  crossref(new windwow)
2.
Failure strain formulation via average stress triaxiality of an EH36 high strength steel, Ocean Engineering, 2014, 91, 218  crossref(new windwow)
3.
Fracture Simulation of Low-Temperature High-Strength Steel (EH36) using User-Subroutine of Commercial Finite Element Code, Journal of Ocean Engineering and Technology, 2014, 28, 1, 34  crossref(new windwow)
4.
Development of Three-Dimensional Fracture Strain Surface in Average Stress Triaxiaility and Average Normalized Lode Parameter Domain for Arctic High Tensile Steel: Part II Formulation of Fracture Strain Surface, Journal of Ocean Engineering and Technology, 2015, 29, 6, 454  crossref(new windwow)
5.
Failure strain prediction of an arctic class marine steel (EH36) in average stress triaxiality regime, Modern Physics Letters B, 2015, 29, 06n07, 1540008  crossref(new windwow)
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