Contrasting Fracture Models For Granite Under Dynamic Loading

[+] Author and Article Information
L. A. Glenn

Lawrence Livermore Laboratory, Livermore, Calif.

W. Janach

Institut CERAC, S. A., Ecublens, Switzerland

J. Eng. Mater. Technol 100(3), 287-293 (Jul 01, 1978) (7 pages) doi:10.1115/1.3443492 History: Received February 09, 1978; Revised March 02, 1978; Online August 17, 2010


A “symmetric impact” experiment was used as the basis for comparing different models of the fracture mechanism in granite. Two different tensile fracture models were considered, but better results were obtained when both shear and tensile fracture were admitted. The combined model employs a fracture criterion based on static measurements of the tensile and triaxial compressive strength and emphasizes the role of bulking, which is related directly to the local rate of energy dissipation. It is shown that the behavior subsequent to incipient fracture has a major influence on the overall material response.

Copyright © 1978 by ASME
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