Author(s)

J. Toribio

Abstract

In constant strain rate (CSR) tests on pre-cracked or notched specimens, the local strain rate at the crack or notch tip —and not the global strain rate or externally applied testing displacement rate— is the variable governing the process. However, local strain rate changes with the time even for constant global strain rate. This paper suggests two possibilities to overcome this difficulty: (i) a real computer-controlled CSR test during which the local strain rate does keep constant by means of real time processing or (ii) a computer post-processing of results of a standard CSR test with variable local strain rate, so as to obtain universal results. 1 Introduction It is well known [1-5] that one of the most promising experimental techniqu

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