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Application of the Static Photoelastic Experimental Hybrid Method to the Crack Propagation Criterion for Isotropic Materials

등방성체의 균열전파 기준에 정적 광탄성 실험 하이브리드 법 적용

  • 신동철 (영남대학교 기계공학부) ;
  • 황재석 (영남대학교 기계공학부) ;
  • 남성수 (영남대학교 대학원 기계공학부)
  • Published : 2004.08.01

Abstract

The specimen materials used in this research are isotropic epoxy resins. The static photoelastic experiment was applied to them. And then the specimens used in photoelastic experiment were fractured under static load. The static photoelastic experimental hybrid method was introduced and its validity had been assured. Crack propagation criterion used the stress components, which are considered the higher order terms, obtained from the static photoelastic experimental hybrid method was introduced and it was applied to the minimum strain energy density criterion, the maximum tangential stress criterion and mode mixity. Comparing the actual initial angle of crack propagation with the theoretical initial angle of crack propagation obtained from the above failure criterions, the validities of the above two criterions are assured and the optimal distance (r) from the crack-tip is 0.01mm in order to get the initial angle of crack propagation of isotropic epoxy resin.

Keywords

Isotropic Material;Static Photoelastic Experimental Hybrid Method;Crack Propagation Criterion;Minimum Strain Energy Density Criterion;Maximum Tangential Stress Criterion;Mode Mixity

References

  1. Hawong, J. S., Lin, C. H., Lin, S. T., Rhee, J. and Rowlands, R. E., 1995, 'A Hybrid Method to Determine Individual Stresses in Orthotropic Composites Using Only Measured Isochromatic Data,' Journal of Composite Material, Vol. 29, No. 18, pp. 2366-2387 https://doi.org/10.1177/002199839502901801
  2. Shin, D. C., Hawong, J. S., Lee, H. J., Nam, J. H. and Kwon, O. S., 1998, 'Application of Transparant Photoelastic Experiment Hybrid Method to the Fracture Mechanics of Isotropic Material,' Tans. of KSME (A), Vol. 22, No.5, pp. 834-842
  3. Shin, D. C., Hawong, J. S., Nam, J. H., Lee, H. J. and Kwon, O. S., 1998, 'Application of Transparant Photoelastic Experimental Hybrid Method for the Fracture Mechanics of Orthotropic Material,' Tans. of KSME (A), Vol. 22, No.6, pp. 1036-1044
  4. Hawong, J. S., Shin, D. C. and Lee, H. J., 2001, 'Photoelastic Experimental Hybrid Method for Fracture Mechanics of Anisotropic Materials,' Experimental Mechanics, Vol. 41, No. 1, pp. 92-99 https://doi.org/10.1007/BF02323110
  5. Griffith, A. A., 1921, 'The Phenomena of Rupture and Flow in Solids,' Phi. Trans. Royal Soc. London A, Vol. 221, pp. 163-198 https://doi.org/10.1098/rsta.1921.0006
  6. Hussain, M. A., Pu, S. L. and Underwood, J., 1974, 'Strain Energy Release Rate for a Crack under Combined Mode I and Mode II,' Fract. Anai. ASTM STP, Vol. 560, pp. 2-28 https://doi.org/10.1520/STP33130S
  7. Erdogan, F. and Sih, G. C., 1963, 'On the Crack Extension in Plates under Plane Loading and Transverse Shear,' Tran. ASME, pp. 519-528
  8. Sih, G. C., 1972, 'Mechanics of Fracture,' Noordhoff, Leyden
  9. Sih, G. C., 1974, 'Strain-Energy-Density Factor Applied to Mixed Crack Problems,' Int. J. Frac .. Vol. 10, No.3. pp. 305-321 https://doi.org/10.1007/BF00035493
  10. Muskhelishvili, N. I., 1963, 'Some Basic Problems of the Mathematical Theory of Elasticity,' 4th Edition, P. Noordhoff Ltd., Groningen, Netherlands
  11. Sih, G C., Liebowitz, H., 1968, 'Mathematical Theories of Brittle Fracture,' Fracture an Advanced Treatise, Academic Press, New York, Vol. II, pp. 67-190
  12. Kitagawa, H. and Yuuki, R., 1977, 'Analysis of Arbitrarily Shaped Crack in a Finite Plate Using Conformal Mapping, 1st Report-Construction of Analysis Procedure and its Applicability,' Trans. Japan Soc. Mech. Engrs., Vol. 43, No. 376, pp. 4354-4362 https://doi.org/10.1299/kikai1938.43.4354
  13. Williams, J. G. and Ewing, P. D., 1972, 'Fracture under Complex Stress the Angled Crack Problem,' Int. J. Frac. Mech., Vol. 8, No.4, pp. 441-445

Cited by

  1. Influence of Stress Shape Function on Analysis of Contact Problem Using Hybrid Photoelasticity vol.37, pp.3, 2013, https://doi.org/10.3795/KSME-A.2013.37.3.345