To give an example, for a 30 MPa concrete specimen of 50 mm length, the strain rate limit according to the above formula is roughly about 50 s−1. This means for tests beyond such a strain rate limit, either a shorter specimen needs to be used, or stress non-uniformity at failure ...
Regression formulae for SCFs, derived from parametric stress analyses, are presented for elliptical and rectangular scallops with rounded corners. The approaches are illustrated by examples from which conclusions for the practical application are drawn....