Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Empirical Relationship Between SP-curves and Tensile Properties in Mn-Mo-Ni Low Alloy Steels

Mn-Mo-Ni 저합금강의 SP-곡선과 인장물성과의 실험적 관계

  • 이재봉 (충북대학교 안정공학과) ;
  • 김민철 (한국원자력연구소 원자력재료기술개발부) ;
  • 박재학 (충북대학교 안전공학과) ;
  • 이봉상 (한국원자력연구소 원자력재료기술개발부)
  • Published : 2004.05.01
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Abstract

An empirical relationship between parameters from SP curves and tensile properties has been systematically investigated by experimental tests and FEM simulations. A series of SP and tensile tests were performed. SP tests were also simulated by FE analysis with various tensile properties. It was found that the yield loads(Py) and the maximum loads( $P_{MAX}$) in SP curves were linearly related with the yield strength($\sigma$$_{o}$) and the tensile strength($\sigma$$_{UTS}$), respectively. The yield loads defined from the intersection point of two lines tangent to the elastic bending region and plastic bending region showed better relation to the yield strength than those from offset line. The maximum loads in SP curves showing plastic instability region was linearly related with the tensile strengths. The slope of SP curves in simulation results had a close correlation with the hardening coefficient and hardening strength as well.l.l.l.

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References

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