This study focuses on the evaluation of several strain measuring techniques for the
instrumentation of an in-plane biaxial test bench. Strain gages, electronic speckle pattern interferometry
(ESPI) and digital image correlation (DIC) were used combined or separately to measure the
strains in the central gauge area of a biaxially loaded cruciform composite specimen. Applicability of
the technique for this specific test and accuracy of the results are important parameters in the
evaluation process of the different strain measuring techniques. The results of the three techniques
are compared with the results obtained with a 3D finite element (FE) model. It is shown that DIC is
the most promising technique because of its full-field character and ability to cope with vibrations of
the test bench. The main drawback remains its incapability to correlate across discontinuities.
Original languageEnglish
Pages (from-to)210-217
Number of pages8
Issue number4
Publication statusPublished - 2011

    Research areas

  • biaxial testing, cruciform specimen, strain measuring techniques, DICT, ESPI

ID: 2017243