A Study of Theories of Fracture Under Combined Stresses

[+] Author and Article Information
I. Cornet

Department of Mechanical Engineering, University of California, Berkeley, Calif.

R. C. Grassi

Department of Industrial Engineering, University of California, Berkeley, Calif.

J. Basic Eng 83(1), 39-44 (Mar 01, 1961) (6 pages) doi:10.1115/1.3658888 History: Received January 26, 1960; Online November 04, 2011


Experimental data are presented for a cast nodular iron and for high-silicon cast iron materials which represent limiting conditions of ductility in a test of fracture theories. Data of other pertinent investigations are reviewed and various failure theories are discussed with regard to their applicability. It is concluded that failure under combined stresses of brittle materials can be predicted adequately by applying a notch modified distortion energy criterion. However, other criteria are also applicable. Since criteria for the failure of brittle materials are conspicuously phenomenological, the application of solid state and dislocation theory, to explain the initiation and growth of a crack in a heterogeneous structure under combined stresses, has been discussed.

Copyright © 1961 by ASME
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