On Energy-Release Rates for a Plane Crack

[+] Author and Article Information
A. Golebiewska Herrmann, G. Herrmann

Division of Applied Mechanics, Department of Mechanical Engineering, Stanford University, Stanford, Calif. 94305

J. Appl. Mech 48(3), 525-528 (Sep 01, 1981) (4 pages) doi:10.1115/1.3157667 History: Received September 01, 1980; Revised January 01, 1981; Online July 21, 2009


Considered is a plane crack in a homogeneous, static stress field. The component of the Ji integral normal to the plane of the crack (J2 ) is shown not to be path-independent in the sense of the well-known J integral (≡ J1 ) parallel to the plane of the crack. The relation between the energy-release rate for rotation L and the integral J2 is established. It is finally suggested that the integrals L and M may provide a more natural description of energy-release rates (or forces) for plane cracks, rather than the integrals J1 and J2 .

Copyright © 1981 by ASME
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