SEDL / STP / STP1210-EB / STP12757S

The Use of Precracked and Notched Slow Strain Rate Specimens

Toribio, J
Professor, University of La Coruña, Arteixo, La Coruña

Pages: 18    Published: Jan 1993

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Abstract

The use of precracked and notched specimens in slow strain rate testing (SSRT) has important advantages, the main one being the localization of the environmental effect in the vicinity of the crack or notch tip. There is, however, an important difficulty in interpretation of results: the local strain rate at the crack or notch tip—and not the externally applied displacement rate—is the variable that controls the environmental cracking. In this paper, results from SSRT of a wide range of notched geometries are compared, showing the interest of presenting the results as a function of local strain rate at the notch tip.