Three-Dimensional Elastic-Plastic Constraint Analysis for Side Crack Tension Specimen

Abstract:

A in-plane stress constraint factor C_i and a out-of-plane stress constraint factor C_o are introduced to study the three-dimensional stress state and the elastic-plastic constraint effect of the crack tip. The deep crack specimens(a/W=0.5) and the shallow crack specimens(a/W=0.1) with different thicknesses are performed in the present study. By using the finite element analysis, the result shows that the thickness effect of the deep crack specimens is more obvious than that of the shallow crack specimens. For the deep crack specimens, the crack constraint enhances with the specimen thickness increase. When the specimen thickness is equal to the specimen width, the constraint levels in the middle 2/3 thickness of the specimen approach to those from the plane strain analyse. For the shallow crack specimens, the crack constraint is almost fixedness when the specimen thickness changes from three times of a crack length to a specimen ligament length. Namely, increased thickness is helpless to enhance the crack constraint effect. Therefore, a shallow crack specimen may be designed by the lesser thickness than the standard deep crack specimen.

• Periodical: Advanced Materials Research (Volumes 476-478)
• Pages: 2548-2551
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.476-478.2548
• Online since: February 2012
• Authors: Zhong Xian Wang, Guang Chen Jiao
• Keywords: Crack-Tip Field, Side Edge Crack Tension Specimen, Stress Constraint, Thickness Effect, Three-Dimensional FEA

References

[1] C. J., Betegon, W., Hancock: Journal of Applied Mechanics, Vol. 58(1991), p.104

[2] N. P. O'dowd, C. F. Shih: Journal of the Mechanics and Physics of Solids, Vol. 39(1991), p.989

[3] S. Yang, Y. J. Chao, M. A. Sutton: Engineering Fracture Mechanics, Vol. 45(1993), p.1

[4] N. Levy, P. V. Marcal, J. R. Rice: Nuclear Engineering and Design, Vol.17 (1971), p.64

[5] A. J. Rosakis, K R. Chandar: International Journal of Solids and Structures, Vol.22 (1986), p.12

[6] P. Chiang, T. V. Hareesh: International Journal of Fracture, Vol.36 (1988), p.243

[7] T. Nakamura, D. M. Praks: Journal of Applied Mechanics, Vol.55(1988), p.805

[8] W. Guo: Engineering Fracture Mechanics, Vol. 46 (1993), p.105

[9] Y. J. Kim, J. S. Kim, S. M. Cho, Y. J. Kim: Engineering Fracture Mechanics, Vol.71 (2004) p.1203

[10] G. Shen, W. R. Tyson, A. Glover, D. Horsley, in: Constraint effects on pipeline toughness, Proceedings of the 4th International Conference on Pipeline Technology, Ostend, Belgium, Vol. 2 (2004), p.703

[11] H. Clausmeyer, K. Kussmaul, E, Roos: Journal of Applied Mechanics Review, Vol. 44 (1991), pp.77-92.