Aspects of Experimental Errors and Data Reduction Schemes From Spherical Indentation of Isotropic Materials

Document Type

Article

Publication Date

7-2014

Publication Title

Journal of Engineering Materials and Technology

Abstract

Sensitivity to experimental errors determines the reliability and usefulness of any experimental investigation. Thus, it is important to understand how various test techniques are affected by expected experimental errors. Here, a semi-analytical method based on the concept of condition number is explored for systematic investigation of the sensitivity of spherical indentation to experimental errors. The method is employed to investigate the reliability of various possible spherical indentation protocols, providing a ranking of the selected data reduction protocols from least to most sensitive to experimental errors. Explicit Monte Carlo sensitivity analysis is employed to provide further insight of selected protocol, supporting the ranking. The results suggest that the proposed method for estimating the sensitivity to experimental errors is a useful tool. Moreover, in the case of spherical indentation, the experimental errors must be very small to give reliable material properties.

Comments

This research was sponsored by the Army Research Laboratory and was accomplished under Cooperative Agreement No. W911NF-06-2-011.

DOI

10.1115/1.4027549

Volume

136

Issue

3

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