Application of Fracture Mechanics to Anisotropic Plates

[+] Author and Article Information
E. M. Wu

Department of Theoretical and Applied Mechanics, University of Illinois, Urbana, Ill.

J. Appl. Mech 34(4), 967-974 (Dec 01, 1967) (8 pages) doi:10.1115/1.3607864 History: Received July 18, 1966; Revised May 11, 1967; Online September 14, 2011


The conditions necessary for the application of fracture mechanics to anisotropic materials were examined and verified experimentally on orthotropic plates. It was observed that crack extension, by opening and forward sliding, occurred independently and the associated stress-intensity factors at the state of incipient fracture are material constants. An empirical relation (k1 /k1 c ) + (k2 /k2 c )2 = 1 was found to be a fracture criterion for both balsa wood and fiber-glass-reinforced plastic plates, inferring the existence of a general law of fracture for orthotropic materials.

Copyright © 1967 by ASME
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