A Three-Dimensional Finite Element Analysis of the Double-Torsion Test

[+] Author and Article Information
A. A. Tseng

Westinghouse Electric Corporation, Tampa, Fla. 33616

J. T. Berry

School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Ga. 30332

J. Pressure Vessel Technol 101(4), 328-335 (Nov 01, 1979) (8 pages) doi:10.1115/1.3454641 History: Received April 03, 1978; Revised February 26, 1979; Online October 25, 2010


A special three-dimensional crack-tip element has been developed to investigate a simple and widely applicable fracture toughness test method. Previous experimental work with the double-torsion method has shown that the use of a relatively thin sectioned specimen may be permitted. The section concerned is considerably thinner than that used in conventional techniques, while the technique also simplifies the determination of the fracture toughness parameter. K IC values, which are independent of the crack length, have been obtained for glasses, ceramics, polymers, and a variety of metals and alloys. The numerical solution presented is supportive of many experimental observations made during testing. Excellent correlation between the finite element and experimental results has been obtained. The maximum stress intensity factor is shown to be almost independent of crack length over a considerable range.

Copyright © 1979 by ASME
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