The Effects of CCT Specimen Geometry and Loading Condition on the J-Integral

CCT시편의 형상과 하중조건이 J 적분에 미치는 영향

  • 이억섭 (인하대학교 기계공학부) ;
  • 김종호 (인하대학교 대학원 기계공학과)
  • Published : 2003.02.01

Abstract

The effects of specimen geometry, and loading conditions on the J-integral fur CCT (center cracked tension) specimens are investigated by using FEM. It is found that the J-integral tends to decrease according to the parallel tensile loading to crack line. Furthermore, it is verified that the compressive parallel loading to crack line is likely to increase the J-integral. A stress ratio of length to width of the center CCT specimen is confirmed to affect the J-integral significantly.

Keywords

References

  1. 이억섭, 김승권, '일정진폭 및 파대하중 하에서의 피로 균열 성장 수명 예측,' 한국정밀공학회지, 제15권, 제10호, pp. 113-119, 1998
  2. Rice, J. R., 'A Path Independent Integral and the Approximate Analysis of Strain Concentration by Noches and Cracks,' Journal of Applied Mechanics, Vol. 35, pp. 379-386, 1968 https://doi.org/10.1115/1.3601206
  3. Wells, A. A., 'Unstable Crack Propagation in Metals: Cleavage and Fast Fracture,' Proceedings of the Crack Propagation Symposium, Vol. 1, Paper 84, Cranfield, UK, 1961
  4. de Koning, A. U., 'A Contribution to the Analysis of Slow Stable Crack Growth,' The Netherlands National Aerospace Laboratory Report NLR MP 75035U, 1975
  5. Paris et al, 'The Theory of Intensity of the Tearing Mode of Elastic-Plastic Crack Growth,' Elastic-Plastic Fracture, ASTM STP 668, American Society for Testing and Mechanics, pp. 5-36, 1977
  6. Rosakis, A. J. 'Experimental Determination of the Fracture Initiation and Dynamic Crack Propagation Resistance of Structural Steels by the Optical Method of Caustics,' M. S. thesis Brown Univ., 1980
  7. Lee, O. S. and Hong, S. K., 'Determination of Stress Intensity Factors and J-Integral Using the Method of Caustics,' Engineering Fracture Mechanics, Vol. 44, No. 6, pp. 981-989, 1993 https://doi.org/10.1016/0013-7944(93)90118-C
  8. Landes, J. D. and Begley, J. A., 'The Effect of Specimen Geometry on $J_{IC}$,' ASTM STP 514, ASTM, Philadelphia, pp. 24-29, 1972
  9. Kirt, M. T., Dodds, R. H., Jr., and Anderson, T. L., 'Approximate Techniques for Predicting Size Effects on Cleavage Fracture Toughness,' Fracture Mechanics: 24th Volume, ASTM STP 1207, ASTM, Philadelphia, (in press)
  10. Hancock, J. W., Reuter, W. G., and Parks, D. M., 'Constraint and Toughness Parameterized by T,' Constraint Effects in Fracture, ASTM STP 1171, ASTM, Philadelphia, pp. 21-40, 1993
  11. Sumpter, J. D. G., 'An Experimental Investigation of the T stress Approach,' Constraint Effects in Fracture, ASTM STP 1171, ASTM, Philadelphia, pp. 492-502, 1993
  12. O'Dowd, N. P. and Shih, C. F., 'Family of Crack-Tip Fields Characterized by a Triaxiality Parameter-1. Structure of Fields,' Journal of the Mechanics and Physics of Solids, Vol. 39, pp. 898-1015, 1991
  13. O'Dowd, N. P. and Shih, C. F., 'Family of Crack-Tip Fields Characterized by a Triaxiality Parameter-II. Fracture Applications,' Journal of the Mechanics and Physics of Solids, Vol. 40, pp. 939-963, 1992 https://doi.org/10.1016/0022-5096(92)90057-9
  14. Anderson, T. L., Fracture Mechanics (2nd ed.), pp. 160-178, 1995
  15. Boyler, H. E., Atlas of Stress-Strain Curves, ASM International p. 165
  16. Hilton, P. D. and Gifford, L. N., 'Elastic-Plastic Finite Element Analysis for Two-Dimensional Crack Problems,' ASTM STP 803, pp. 256-273, 1983