Abstract
For mode-I loading, in order to describe the near-tip stress field in a specimen under large scaled yielding, two parameter approaches such as J-T, J-Q and J-A2 theories have been developed and proved well for their validity and limit. In this work elastic-plastic finite element analysis were performed to investigate the effects of mode mixity and T-stress upon near-tip stress distribution for a small-scale-yield model with the modified boundary layer and CTS (Compact Tension-Shear) configuration under large-scale-yield state. As the results, some peculiar characteristics were found as follows; As the mode mixity increases, normal stresses σrr and σθ θ near the crack tip in the small-scale-yield model get significantly affected by the positive T-stress as well as the negative T-stress, while the shear stress σrθ is little affected by T-stress. Also, the near-tip stress distribution of short cracked CTS specimens under the large-scale-yield state agree fairly well with that of the small-scale-yield model with an appropriate positive T-stress. The two parameters approach with J-integral and T-stress seems to be a good tool for describing the near-tip stress field under a mixed mode loading and large-scale-yield state.
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References
ABAQUS(1997). User's Manual, Version 5.7. HKS Inc.
Al-Ani, A.M. and Hancock, J.W. (1991). J-dominance of short cracks in tension and bending. Journal of the Mechanics and Physics of Solids 39, 23–43.
Anderson, T.L. (1995). in Fracture Mechanics, Fundamentals and Applications. CRC Press, 155–178.
Betegon, C. and Hancock, J.W. (1991). Two-parameter characterization of elastic-plastic crack-tip fields. Journal of Applied Mechanics 58, 104–110.
Dhirendra, V.K. and Narasimhan, R. (1998). Mixed-mode steady-state crack growth in elastic-plastic solids. Engineering Fracture Mechanics 59, 543–559.
Du, Z.Z., Betagon, C., and Hancock, J.W. (1990). J dominance in mixed-mode loading. International Journal of Fracture 52, 191–206.
Faleskog J. and Shih, C.F. (1997). Micromechanics of coalesence-I. Synergistic effects of elasticity, plastic yielding and multi-size-scale voids. Journal of the Mechanics and Physics of Solids 45, 21–50.
Hutchinson, J.W. (1968). Singular behavior at the end of a tensile crack tip in a hardening material. Journal of the Mechanics and Physics of Solids 16, 13–31.
Kang, K.J., Kim, D.H., and Choi, S.H. (2002). Effects of mode mix upon fracture behavior of a solder joint. International Journal of Fracture 113, 195–212.
Larsson, S.G. and Carlsson, A.J. (1973). Influence of non-singular stress term and specimen geometry on smallscale yielding at crack tips in elastic-plastic material. Journal of the Mechanics and physics of Solids 21, 263–277.
Lee, K.W. and Earmme, Y.Y. (1998). Effect of geometric parameters on popcorn cracking in plastic packages during VPS process. Finite Elements in Analysis and Design 30, 81–96.
Leevers, P.S. and Radon, J.C. (1982). Inherent stress biaxiality in various fracture specimen geometries. International Journal of Fracture 19, 311–325.
O'Dowd, N.P. and Shih, C.F. (1991). Family of crack-tip fields characterized by a triaxiality parameter-I. Structure of fields. Journal of the Mechanics and Physics of Solids 39, 898–1015.
O'Dowd, N.P. and Shih, C.F. (1992). Family of crack-tip fields characterized by a triaxiality parameter-II. Fracture applications. Journal of the Mechanics and Physics of Solids 40, 939–963.
Pahn, L.O. and Earmme, Y.Y. (2000). Analysis of a short interfacial crack from the corner of a rectangular inclusion. International Journal of Fracture 106, 341–356.
Rice, J.R. and Rosengren, G.F. (1968). Plane strain deformation near a crack tip in a power law hardening material. Journal of the Mechanics and Physics of Solids 16, 1–12.
Rice, J.R. (1974). Limitation to the small scale yielding approximation for crack tip plasticity. Journal of the Mechanics and Physics of Solids 22, 17–26.
Richard, H.A. and Benitz, K. (1983). A loading device for the creation of mixed mode in fracture mechanics. International Journal of Fracture 22, 55–58.
Roy, Y. Arun and Narasimhan, R. (1997). J-dominance in mixed mode ductile fracture specimen. International Journal of Fracture 88, 259–279.
Shih, C.F.(1974). Small scale yielding analysis of mixed mode plane strain crack problems. Fracture Analysis. ASTM STP 560, 187–210.
Shih, C.F., Moran, B. and Nakamura, T. (1986). Energy release rate along a three-dimension crack front in a thermally stressed body. International Journal of Fracture 30, 79–102.
Tradegard, A., Nilsson, F., and Ostlund, S. (1998). J-Q characterization of propagating cracks. International Journal of Fracture 94, 357–369.
Varias, A.G., Suo, Z. and Shih, C.F. (1991). Ductile Failure of a Constrained Metal Foil. Journal of the Mechanics and physics of Solids, 39, 963–986.
Wang, Y.Y. (1993). On the two-parameter characterization of elastic-plastic crack-front fields in Surface-cracked plates. Constraint Effects in Fracture ASTMSTP 1171, 120–138.
Wang, Y.Y. and Parks, D.M. (1995). Limit of J-T characterization of elastic-plastic crack-tip fields. Constraint effects in fracture Theory and Application: Second Volume. ASTM STP 1244, 43–67.
Williams, M.L. (1957). On the stress distribution at the base of a stationary crack. Journal of applied mechanics 24, 109–114.
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Kim, DH., Kang, KJ. Two parameter approach for elastic-plastic fracture of short cracked specimens under mixed mode loading. International Journal of Fracture 116, 245–273 (2002). https://doi.org/10.1023/A:1020143006737
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DOI: https://doi.org/10.1023/A:1020143006737