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RESEARCH PAPERS

The Influence of Warm Prestressing on the Brittle Fracture of Structures Containing Sharp Defects

[+] Author and Article Information
T. C. Harrison

British Steel Corporation, General Steels Division, Central Research Laboratories, Teesside, U. K.

G. D. Fearnehough

Gas Council Engineering Research Station, Harvey Combe, Killingworth, Newcastle upon Tyne, U. K.

J. Basic Eng 94(2), 373-376 (Jun 01, 1972) (4 pages) doi:10.1115/1.3425427 History: Received January 25, 1972; Online October 27, 2010

Abstract

The low temperature fracture behavior of prestressed notched bars has been studied. The fracture stress was generally below the prestress level due to the influence of reverse plastic flow at the notch tip on unloading. When reverse plastic flow was prevented, low temperature fracture occurred at stress levels in excess of the prestress level. The benefits of prestressing are interpreted in terms of the introduction of plastic zones rather than the influence of residual stresses. The influence of aging and higher strain rates on the fracture behavior of prestressed specimens is also studied.

Copyright © 1972 by ASME
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