Transactions of the Korean Society of Pressure Vessels and Piping (한국압력기기공학회 논문집)

Korean Society of Pressure Vessels and Piping (한국압력기기공학회)
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Finite Element Damage Analysis Method for J-Resistance Curve Prediction of Cold-Worked Stainless Steels

조사취화를 모사한 스테인레스강의 파괴저항선도를 예측하기위한 유한요소 손상해석기법

  • Received : 2018.01.02
  • Accepted : 2018.01.18
  • Published : 2018.06.30
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Abstract

Materials in nuclear power plants can be embrittled by neutron irradiation. According to existing studies, the effect of the material property by irradiation embrittlement can be approximately simulated by cold working (pre-strain). In this study, finite element damage analysis method using the stress-modified fracture strain model is proposed to predict J-Resistance curves of irradiated SUS316 stainless steel. Experimental data of pre-strained SUS316 stainless steel material are obtained from literature and the damage model is determined by simulating the tensile and fracture toughness tests. In order to consider damage caused by the pre-strain, a pre-strain constant is newly introduced. Experimental J-Resistance curves for various degrees of pre-strain are well predicted.

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References

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