Author(s)

K. Zarrabi & Z. Lu

Abstract

A computer aided optical technique for creep strain determination K. Zarrabi & Z. Lu The School of Mechanical and Manufacturing Engineering The University of New South Wales, Australia Abstract One of the unresolved engineering problems is the creep strain measurement at elevated temperatures. A non-destructive computer aided optical technique using a digital image cross-correlation scheme is developed. It is shown that the technique is capable of measuring creep strains at elevated temperatures with the maximum error of 1.9%. 1 Introduction One of the as yet unresolved engineering problems is the measurement of creep strains at elevated temperatures. Although weldable resistance and capacitance strain gauges are commercially available, they do not produce reliable and repeatable results for many applications involving creep strain measurements [I]. Ideally, a robust full-field measurement technique is needed. Displacementlstrain measurement methods that have been used include laser interfero

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