Combined Mode Fracture Toughness Measurement by the Disk Test

[+] Author and Article Information
Hideo Awaji

Department of Mechanical Engineering, Fukushima Technical College, Iwaki, Japan

Sennosuke Sato

Department of Mechanical Engineering, The University of Ibaraki, Hitachi, Japan

J. Eng. Mater. Technol 100(2), 175-182 (Apr 01, 1978) (8 pages) doi:10.1115/1.3443468 History: Received August 17, 1977; Revised January 19, 1978; Online August 17, 2010


The disk test in which a circular specimen with an internal crack is subjected to diametral compression is used to investigate combined mode I and mode II fracture. The stress intensity factors in the disk test are calculated numerically by means of the boundary collocation procedure and the dislocation method. Special care was taken to analyze the effect of the compression anvils. This method has the advantage, of allowing successive measurement of mode I, mode II and the combined mode fracture toughness under the same conditions. Some kinds of graphite, plaster and marble are examined to obtain the fracture toughness values, KIC , KIIC and the combined mode fracture criterion.

Copyright © 1978 by ASME
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