Challenges in Mechanics of Time Dependent Materials, Volume 2 by Alex Arzoumanidis Meredith Silberstein & Alireza Amirkhizi

Author:Alex Arzoumanidis, Meredith Silberstein & Alireza Amirkhizi
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

8.3 Creep Stress Exponent Determination Through Indentation

The classical approach to compare indentation and uniaxial creep data makes use of conversion factors. The section stress σ N which characterizes the load in an indentation creep experiment is defined as the force F applied on the indenter divided by the cylindrical indenter area A. The conversion factors relate the net section stress to an appropriate uniaxial reference stress by;

(8.4)

The conversion factors c o is a conversion factor which ranges from 0.26 to 0.36 [4]. The uniaxial reference strain rate is given by;

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