Browse > Article
http://dx.doi.org/10.3795/KSME-A.2015.39.10.1001

Estimation of Transient Creep Crack-tip Stress Fields for SE(B) specimen under Elastic-Plastic-Creep Conditions  

Lee, Han-Sang (Department of Mechanical Engineering, Korea Univ.)
Je, Jin-Ho (Department of Mechanical Engineering, Korea Univ.)
Kim, Dong-Jun (Department of Mechanical Engineering, Korea Univ.)
Kim, Yun-Jae (Department of Mechanical Engineering, Korea Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.39, no.10, 2015 , pp. 1001-1010 More about this Journal
Abstract
This paper estimates the time-dependent crack-tip stress fields under elastic-plastic-creep conditions. We perform Finite-Element (FE) transient creep analyses for a Single-Edge-notched-Bend (SEB) specimen. We investigate the effect of the initial plasticity on the transient creep by systematically varying the magnitude of the initial step-load. We consider both the same stress exponent and different stress exponent in the power-law creep and plasticity to determine the elastic-plastic-creep behaviour. To estimation of the crack-tip stress fields, we compare FE analysis results with those obtained numerically formulas. In addition, we propose a new equation to predict the crack-tip stress fields when the creep exponent is different from the plastic exponent.
Keywords
Elastic-Plastic-Creep; Crack-Tip Stress Fields; Transient Creep; FE Analysis; SEB Specimen;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Riedel, H., 1987, Fracture at High Temperature, Springer-Verlag, Berlin.
2 Irwin, G.R., 1961, "Plastic Zone Near a Crack and Fracture Toughness," Sagamore Research Conference Proceeding, vol.4, pp.63-78.
3 Dugdale, D.S., 1960, "Yielding in Steel Sheets Containing Slits," Journal of the Mechanics and Physics of Solids, vol. 8, pp.100-104.   DOI   ScienceOn
4 Barenblatt, G.I., 1962, "The Mathmatical Theory of Euilibrium Cracks in Brittle Fracture," Advance in Applied Mechanics, vol.7, pp. 55-129.   DOI
5 Wells, A.A., 1961, "Unstable Crack Propagation in Metal: Cleavage and Fracture," Proceedings of the Crack Propagation Symposium, vol. 1, pp. 84.
6 Rice, J. R., 1968, "A Path Independent Integral and the Approximate Analysis of Strain Concentration by Notches and Cracks," Journal of Applied Mechanics, Vol. 53, pp. 379-386.
7 Huchinson, J. W., 1968, "Singular Behavior at End of a Tensile Crack Tip in a Hardening Material," Journal of the Mechanics and Physics of Solids, Vol. 16, pp. 13-31.   DOI   ScienceOn
8 Rice, J. R. and Rosengren, G.F., 1968, "Plane Strain Deformation near a Crack Tip in a Power-Law Hardening Material," Journal of the Mechanics and Physics of Solids, Vol. 16, pp. 1-12.   DOI   ScienceOn
9 Riedel, H. and Rice, J. R., 1980, "Tensile Cracks in Creeping Solids," ASTM STP 700, Philadelphia, pp. 189-221.
10 Joch, J. and Ainsworth, R. A., 1992, "The Effect of Geometry on the Development of Creep Singular Fields for Defects under Step-Load Controlled Loading," Fatigue & Fracture of Engineering Materials & Structures, Vol. 15, No. 3, pp. 229-240.   DOI
11 Webster, G. A. and Ainsworth, R. A., 1994, High Temperature Component Life Assessment, CHAPMAN & HALL, UK.
12 ABAQUS version 6. 13., 2013, User's Manual, Inc. and Dassault Systems.
13 Kim, Y. J., 1999, "Evaluation of Time Dependent Contour Integrals (J and C) in Creep: Comparison of ABAQUS and BERSAFE Results," British Energy Generation LTd, Report EPD/GEN/REP/0500/99.
14 Williams, M. L., 1957, "On the Stress Distribution at the Base of a Stationary Crack," Journal of Applied Mechanics, Vol. 24, pp. 109-114.
15 Han, J. J., Kim, Y. J., Jerng, D. W., Nikbin, K. and Dean, D., 2014, "Quantification of Creep Stresses within HAZ in Welded Branch Junctions," Fatigue & Fracture of Engineering Materials & Structures, Vol. 38, No. 1, pp. 113-124.   DOI