DOI QR코드

DOI QR Code

STS 316L의 재결정 열처리법을 이용한 구속효과 평가

Evaluation of the Plastic Region Using Recrystallization Heat Treatment for Constraint Effect with STS 316L

  • 한민수 (목포해양대학교 기관시스템공학부) ;
  • 장석기 (목포해양대학교 기관시스템공학부)
  • 발행 : 2009.05.31

초록

The constraint effect $A_2$ has to be evaluated within plastic region near crack tip front using opening displacement. Plastic boundary and stress or strain conditions in the vicinity of the crack tip using recrystallization heat treatment was represented. It was found that the plastic deformation boundary by recrystallization heat treatment method was the true strain of ${\epsilon}t$ = 0.05mm/mm. With the estimation of constraint effects $A_2$, the region of proper displacement measurement point near crack tip was between 0mm and 1mm distance toward direction of crack propagation, and was between 1mm to 3mm distance toward direction of load line.

키워드

참고문헌

  1. Y. L. Chao, S. Yang and M. A. Sutton, "On the fracture of solids characterized by one or two parameters : Theory and practice", J. Mech. Phys. Solids, Vol. 42, No. 4, pp. 629-647, 1994 https://doi.org/10.1016/0022-5096(94)90055-8
  2. 한민수, 장석기, 이돈출, 김성종, 박종식, "균열선단 개구변위를 이용한 파괴인성평가와 구속효과와의 관계", 2006년도 한국마린엔지니어링학회 전기학술대회, pp. 91-92, 2006
  3. 한민수, 장석기, '실험적 변위측정위치에 따른구속효과 A2의 거동', 대한금속・재료학회지, 제46권, 제6호, pp. 345-350, 2008
  4. Y. J. Chao and X. K. Zhu, "A simple theory for describing the transition between tensile and shear mechanisms in mode Ⅰ, Ⅱ, Ⅲ, and mixed-mode fracture", Mixed-Mode Crack Behavior, ASTM STP 1359, pp. 41-57, 1999
  5. Chongmin Song, John P. Wolf, "Semi -analytical representation of stress singularites as occurring in crack in anisotropic multi- materials with the scaled boundary finite-element method", Compters and Structures, Vol. 80, pp. 183-197, 2002 https://doi.org/10.1016/S0045-7949(01)00167-5
  6. Zhonghua Li and K. H. Schwalbe, "Engineering treatment model for creep crack driving force estimation: CTOD in terms of $\delta_5$", Engineering Fracture Mechanics, Vol. 68, pp. 221-233, 2001 https://doi.org/10.1016/S0013-7944(00)00065-5
  7. 한민수, 장석기, '실험적 변위측정위치에 따른 구속효과 $A_2$의 거동', 대한금속.재료학회지, 제 46권, 제 6호, pp. 345-350, 2008
  8. Y. Iino, "Accumulated plastic zone around fatigue crack in type 304 stainless steel", Metal Sci. Vol. 10, pp. 159-164, 1976 https://doi.org/10.1016/0036-9748(76)90139-3
  9. T. Shoji, "Deformation of crack tip energy dissipation and elastic-plastic toughness parameter with ductile crack extension" Journal of Testing and Evaluation, Vol. 6, pp. 324-334, 1981
  10. J. W. Hutchinson, "Singular behavior at the end of a tensile crack in a hardening material", J. Mech. Phys. Solids, Vol. 16, pp. 13-31, 1968 https://doi.org/10.1016/0022-5096(68)90014-8
  11. J. R. Rice and G. F. Rosengren, "Plane strain deformation near a crack tip in a power law hardening material", J. Mech. Phys. Solids, Vol. 16, pp. 1-12, 1968 https://doi.org/10.1016/0022-5096(68)90013-6