Structural Engineering and Mechanics

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Stress intensity factors for an interface crack between an epoxy and aluminium composite plate

  • Itou, S. (Dept. of Mechanical Engineering, Kanagawa University)
  • Received : 2006.03.06
  • Accepted : 2006.11.10
  • Published : 2007.05.10
⟨ Previous Next ⟩

Abstract

A cracked composite specimen, comprised of an epoxy and an aluminium plate, was fractured under a tensile load. In this paper, two crack configurations were investigated. The first was an artificial center crack positioned in the epoxy plate parallel to the material interface. The other was for two edge cracks in the epoxy plate, again, parallel to the interface. A tensile test was carried out by gradually increasing the applied load and it was verified that the cracks always moved suddenly in an outward direction from the interface. The d/a ratio was gradually reduced to zero, and it was confirmed that the maximum stress intensity factor value for the artificial center crack, $K_{{\theta}{\theta}}^{max}$, approached that of an artificial interface crack,$K_{{\theta}{\theta}}^{ifc\;max}$ (where: 2a is the crack length and d is the offset between the crack and interface). The same phenomenon was also verified for the edge cracks. Specifically, when the offset, d, was reduced to zero, the maximum stress intensity factor value, $K_{{\theta}{\theta}}^{max}$, approached that of an artificial interface edge crack.

Keywords

References

  1. Chen, J. (2005), 'Determination of thermal stress intensity factors for an interface crack in a graded orthotropic coating-substrate structure', Int. J. Fracture., 133, 303-328 https://doi.org/10.1007/s10704-005-4728-7
  2. Comninou, M. (1977), 'The interface crack', J. Appl. Mech., ASME, 44, 631-636 https://doi.org/10.1115/1.3424148
  3. Delale, F. and Erdogan, F. (1988), 'Interface crack in a nonhomogeneous elastic medium', Int. J. Eng. Sci., 28, 559-568
  4. England, A.H. (1965), 'A crack between dissimilar media', J. Appl. Mech., ASME, 32, 400-402 https://doi.org/10.1115/1.3625813
  5. Erdogan, F. and Sih, G.C. (1963), 'On the crack extension in plates under plane loading and transverse shear', J. Basic Eng., ASME, 85, 519-527 https://doi.org/10.1115/1.3656897
  6. Itou, S. (2004), 'An experiment on stress intensity factors for an interface crack between epoxy and aluminium plate', Int. J. Fracture, 125, 89-102 https://doi.org/10.1023/B:FRAC.0000021081.21287.48
  7. Itou, S., Hashimoto, Y. and Oikawa, T. (2006), 'The effect of the surface roughness of the aluminium edge surface on the crack initial angle for an artificial interface crack between aluminium and epoxy composites (in Japanese)', Report of Dept. Mech. Eng., Kanagawa University, 25-26
  8. Li, C., Duan, Z. and Zou, Z. (2002), 'Torsional impact response of a penny-shaped interface crack in bonded materials with a graded material interlayer', J. Appl. Mech., ASME, 69, 303-308 https://doi.org/10.1115/1.1459066
  9. Mak, A.F., Keer, L.M., Chen, S.H. and Lewis, J.L. (1980), 'A no-slip interface crack', J. Appl. Mech., ASME, 47,347-350 https://doi.org/10.1115/1.3153667
  10. Ozturk, M. and Erdogan, F. (1996), 'Axisymmetric crack problem in bonded materials with a graded interfacial region', Int. J. Solids Struct., 33,193-219 https://doi.org/10.1016/0020-7683(95)00034-8
  11. Snbeeb, N.I. and Binienda, W.K. (1999), 'Analysis of an interface crack for a functionally graded strip sandwiched between two homogeneous layers of finite thickness', Eng. Fract. Mech., 64, 693-720 https://doi.org/10.1016/S0013-7944(99)00099-5
  12. Sun, Y.G., Zhou, Z.G. and Wu, L.Z. (2004), 'Investigating the behaviour of a Griffith crack at the interface between isotropic and orthotropic elastic half-planes for the opening crack mode', JSME Int. J. (Series A), 47, 457-466 https://doi.org/10.1299/jsmea.47.457
  13. Tada, H. (2000), The Stress Analysis of Cracks Handbook, The ASME, New York
  14. Zhou, Z.G, Wang, B. and Sun, Y.G. (2004), 'Investigation otthe behavior of a Griffith crack at the interface of a layer bonded to a half plane using the Schmidt method for the opening crack mode', Mech. Res. Commun., 31, 545-555 https://doi.org/10.1016/j.mechrescom.2004.03.010
  15. Zhou, Z.G. and Wang, B. (2004), 'Investigation of the behavior of a Griffith crack at the interface between two dissimilar orthotropic elastic half-planes for opening crack mode', Appl. Math. Mech., 25, 730-740 https://doi.org/10.1007/BF02437564
  16. Zhou, Z.G., Wang, B. and Yang, L.J. (2004), 'Investigation of the behavior of an interface crack between two half-planes of orthotropic functionally graded materials by using a new method', JSME Int. J. (Series A), 47, 467-478 https://doi.org/10.1299/jsmea.47.467
  17. Zhou, Z.G., Wang, B. and Wu, L.Z. (2005), 'Investigation of the behavior of a crack between two half-planes of functionally graded materials by using the Schmidt method', Struct. Eng. Mech., 19, 425-440 https://doi.org/10.12989/sem.2005.19.4.425

Cited by

  1. Variations of the stress intensity factors for a planar crack parallel to a bimaterial interface vol.30, pp.3, 2007, https://doi.org/10.12989/sem.2008.30.3.317
  2. Experimental and numerical prediction of the weakened zone of a ceramic bonded to a metal vol.8, pp.4, 2007, https://doi.org/10.12989/amr.2019.8.4.295