Comparison with R Curve Behavior fer the K and J Parameter of structural Steel Hot-Rolled Thin Plates

일반구조용강 열간압연 박판의 K와 J 파라미터에 대한 R곡선 거동의 비교

  • Published : 2002.10.01

Abstract

The shape of K-R curve for an ideally brittle material is flat because the surface energy is an unvaried material property. However, the K-R curve can take on a variety of shapes when nonlinear material behavior accompanies fracture. By the way, a general metallic material is nonlinear, structural steel is such. Therefore, the J-R curve form J-integral value instead of K parameters can be used to evaluate elastic-plastic materials with flaws in terms of ductile fracture that can be significant to design. In this paper, R-curve behaviors form K and J parameter is considered for the precise assessment of fracture analysis, in case of JS-SS400 steels.

Keywords