An Experimental Study on the Fatigue Crack Propagation Behavior in CTS Specimen under Mode II Loading

모드 II 하중을 받는 CTS 시험편의 피로균열 전파거동에 관한 실험적 연구

  • 송삼홍 (고려대학교 기계공학과) ;
  • 이정무 (고려대학교 대학원 기계공학과)
  • Published : 2003.07.01


The purpose of this paper is to investigate fatigue crack behavior under shear(Mode II) loading. Various specimens and devices have been used in order to produce Mode II loading in fatigue experiments for shear crack propagation. But, there is not sufficient comparisons of experimental results between Mode II and others loading modes, because of characteristics of applied loads and specimens. So, compact tension shear(CTS) specimens were used in this paper to investigate the propagation behavior of Mode II by comparing the experimental results between loading modes. We firstly observed the characteristics which was showed in Mode II experiment using CTS specimens. The experimental results under Mode II loading were compared with fatigue crack behavior under Mode I and Mixed-mode I+II loading. The characteristics for initiation and propagation behavior under Mode II loading was investigated by such comparisons.


Mode II;Compact Tension Shear Specimen;Shear Load;Crack Propagation Angle;Crack Propagation Path;Maximum Tangential Stress Criterion


  1. Song Sam-Hong, Choi Ji-Hoon and Lee Jeong-Moo, 2002, 'The Mixed Mode Fatigue Crack Propagation Behavior with the Variation of Stress Ratio,' Transaction of the KSME, Vol. 26, No. 11, pp. 2287-2296
  2. Liu, A. F. and Allison, J. E., 1979, 'Effects of Biaxial Stresses on Crack Growth,' ASTM STP 677, pp. 5-12
  3. Otsuka, A., Mori, K., Ohshima, T. and Tsuyama, S., 1981, 'Mode II Fatigue Crack Growth in Aluminum Alloys and Mild Steel,' Fracture 81 (Advances in Fracture Research), pp. 1851-1858
  4. Richard, H. A., 1981, 'A New Compact Shear Specimen,' International Journal of Fracture, Vol. 17, pp. R105-R107
  5. Buzzard, R. J., Gross, B. and Srawley, J. E., 1986, 'Mode II Fatigue Crack Growth Specimen Development,' ASTM STP 905, pp. 329-346
  6. ASTM E647, 'Standard Test Method for Measurement of Fatigue Crack Growth Rates,' Annual Book of ASTM Standards, Vol. 03.01, pp. 565-601
  7. Richard, H. A., 1986, 'Some Theoretical and Experimental Aspects of Mixed Mode Fracture,' Advances Fracture Research, Vol. 5, pp. 3337-3344
  8. Liu, H. W., 1985, 'Shear Fatigue Crack Growth: A Literature Survey,' Fatigue & Fracture of Engineering Materials & Structure, Vol. 8, pp. 295-313
  9. Oh Dong-Joon, 2001, 'Ductile Fracture Behavior of SPS Specimen Under Pure Mode II Loading,' Transaction of the KSME, Vol. 25, No. 2, pp. 289-295
  10. Roberts, R. and Kibler, J. J., 1971, 'Mode II Fatigue Crack Propagation,' Journal of Basic Engineering, Vol. 93, pp. 671-680
  11. Jones, D. L. and Chisholm, D. B., 1975, 'An Investigation of the Edge-sliding Mode in Fracture Mechanics,' Engineering Fracture Mechanics, Vol. 7, pp. 261-276
  12. Pook, L. P. and Greenan, A. F., 1979, 'Fatigue Crack Growth Threshold in Mild Steel Under Combined Loading,' ASTM STP 677, pp. 23-35
  13. Hong, K. J. and Kang, K. J., 1996, 'Method to Measure $K_1,\;K_II$ and J-Integral for CTS Specimen under Mixed Mode Loading,' Transaction of the KSME, Vol. 20, No. 1, pp. 3498-3506
  14. Song Sam-Hong and Lee Jeong-Moo, 2001, 'Fatigue Crack Propagation Behavior in STS304 under Mixed Mode Loading,' Transaction of the KSPE, Vol. 18, No.9, pp. 131-139
  15. Erdogan, F. and Sih, G. C., 1963, 'On the Crack Extension in Plates Under Plane Loading and Transverse Shear,' Journal of Basic Engineering, Vol. 85, pp. 519-525
  16. Sih, G. C., 1974, 'Strain Energy Density Factor Applied to Mixed Mode Crack Problems,' International Journal of Fracture, Vol. 10, pp. 305-321
  17. Keisuke Tanaka, 1974, 'Fatigue Crack Propagation from a Crack Inclined to the Cyclic Tensile Axis,' Engineering Fracture Mechanics, Vol. 6, pp. 493-507
  18. Qian, J. and Fatemi, A., 1996, 'Mixed Mode Fatigue Crack Growth: A Literature Survey,' Engineering Fracture Mechanics, Vol. 55, No.6, pp. 969-990
  19. Richard, H. A. and Benitz, K., 1983, 'A Loading Device for the Criterion of Mixed Mode in Fracture Mechanics,' International Journal of Fracture, Vol. 22, pp. R55-R58
  20. Hallback, N. and Nilson, F., 1994, 'Mixed Mode l/II Fracture Behavior of an Aluminum Alloy,' Journal of the Mechanics and Physics of Solids, Vol. 42, pp. 1345- 1374