Asymmetric Four-Point Crack Specimen

[+] Author and Article Information
M. Y. He

Materials Engineering Department, University of California, Santa Barbara, CA 93106

J. W. Hutchinson

Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138

J. Appl. Mech 67(1), 207-209 (Feb 22, 1999) (3 pages) doi:10.1115/1.321168 History: Accepted February 22, 1999; Received February 22, 1999
Copyright © 2000 by ASME
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Campbell, J. P., 1998, private communication, University of California, Berkeley.
Wang, K. J., Hsu, C. L., and Kao, H., 1977, “Calculation of Stress Intensity Factors for Combined Mode Bend Specimens,” Advances in Research on the Strength and Fracture of Materials, Vol. 4, D. M. R. Taplin, ed., ICF4, Waterloo, Canada, Pergamon Press, New York, pp. 123–133.
He,  M. Y., Cao,  H. C., and Evans,  A. G., 1990, “Mixed-Mode Fracture: The Four-Point Shear Specimen,” Acta Metall. Mater., 38, pp. 839–846.
Suresh,  S., Shih,  C. F., Morrone,  A., and O’Dowd,  N. P., 1990, “Mixed-Mode Fracture Toughness of Ceramic Materials,” J. Am. Ceram. Soc., 73, pp. 1257–1267.
Timoshenko, S. P., and Goodier, J. N., 1970, Theory of Elasticity, 3rd Ed. McGraw-Hill, New York.
Tada, H., Paris, P. C., and Irwin, G. R., 1985, The Stress Analysis of Cracks Handbook, Del Research Corp., St. Louis, MO.
Murakami, Y., 1987, Stress Intensity Factors Handbook, Pergamon Press, New York.


Grahic Jump Location
Role of α=(b2−b1)/W in error of the reference solution (2) for b1/W=1.4 and c/W=0.2
Grahic Jump Location
Error boundaries for mode II stress intensity factor of two percent and four percent for (α=1) for the reference solution (2). Combinations (a/W,b1/W) lying above a boundary have smaller error.
Grahic Jump Location
Correction factor for mode II intensity factor (α=1)
Grahic Jump Location
Location of the crack for pure mode II at its tip (α=1)
Grahic Jump Location
Geometry of the asymmetric bending and shear specimen



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