DOI QR코드

DOI QR Code

Crack Retardation byt Load Reduction During Fatigue Crack Propagation

피로균열전파 동안 하중감소에 의한 균열지연

  • Published : 2003.12.01

Abstract

Fracture life and crack retardation behavior were examined experimentally using CT specimens of aluminum alloy 5083. Crack retardation life and fracture life were a wide difference. between 0.8 and 0.6 in proportion to ratio of load reduction. The wheeler model retardation parameter was used successfully to predict crack growth behavior. By using a crack propagation rule, prediction of fracture life can be evaluated quantitatively. A statistical approach based on Weibull distribution was applied to the test data to evaluate the dispersion in the retardation life and fracture life by the change of load reduction.

Keywords

Crack Propagation;Load Reduction;Crack Retardation;Retardation Life;Fracture Life;Wheeler Model;Weibull Distribution;Statistical Nature

References

  1. Weibull, W., 1951, 'A Statistical Distribution Function of Wide Applicability,' ASME J. Applied Mech., Vol. 18, pp. 293-297
  2. Wheeler, O. E., 1972, 'Spectrum Loading and Crack Growth,' J. of Basic Engineering, Vol. 90, pp. 181-186
  3. Nam, K. W., Iwase, K., Ando, K., 1995, 'Fatigue life and Surface Crack Penetration Behavior of an Aluminum Alloy,' Fatigue Frac. Engng Mater. Struct., Vol. 18, No. 2, pp. 179-187 https://doi.org/10.1111/j.1460-2695.1995.tb00153.x
  4. Choi, J. H., Song, S. H., Kim, K. S. and Choi, B. H., 1998, 'Prediction Model for Crack Retardation Behavior Under Single OVerload,' Transactions of the KSME, A, Vol. 22, No. 10, pp. 1806-1812
  5. Song, S. H. and Lee, K. R., 1998, 'A Study on the Growth Behavior of Short and Long Crack and the Effect of Single Overload,' Transactions of the KSME, A Vol. 22, No. 6, pp. 990-1001
  6. Lee, B. H., Lee, S. B., 1997, 'An Experimental Study on the Fretting fatigue Crack Behavior of AL2024-T4,' Transactions of the KSME, A, Vol 21, No 3, pp. 511-518
  7. Kim, S. J. and Ahn, S. H., 2001, 'An Experimental Study on the Factors that Affect Fatigue Crack Growth Retardation Behavior in S45C Steel,' Trans. of the KSME, A, Vol. 25, No. 3, pp. 470-477
  8. Sheu, B. C., Song, P. S. and Hwang, S., 1995, 'Shaping Exponent in Wheeler Model Under a Single Overload,' Eng. Frac. Mech., Vol. 51, No. 1, pp. 135-143 https://doi.org/10.1016/0013-7944(94)00250-L