Performance Analysis and Experimental Validation of the Direct Strain Imaging Method

Athanasios Iliopoulos; John G. Michopoulos; John C. Hermanson

doi:10.1115/detc2013-13015

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Performance Analysis and Experimental Validation of the Direct Strain Imaging Method

Formally Refereed

Authors:

Athanasios Iliopoulos, John G. Michopoulos, John C. Hermanson

Year:

2013

Type:

Full Proceedings

Station:

Forest Products Laboratory

DOI:

https://doi.org/10.1115/detc2013-13015

Source:

In: Proceedings of the ASME 2013 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference, August 4-7, 2013, Portland, OR, IDETC/CIE 2013, DETC/CIE2013-13015. 11 p.

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Abstract

Direct Strain Imaging accomplishes full field measurement of the strain tensor on the surface of a deforming body, by utilizing arbitrarily oriented engineering strain measurements originating from digital imaging. In this paper an evaluation of the method’s performance with respect to its operating parameter space is presented along with a preliminary validation based on actual experiments on composite material specimens under tension. It has been shown that the method exhibits excellent accuracy characteristics and outperforms methods based on displacement differentiation.

Keywords

full-field measurement, digital imaging, machine vision, multiaxial testing, displacement derivative

Citation

Iliopoulos, Athanasios; Michopoulos, John G.; Hermanson, John C. 2013. Performance Analysis and Experimental Validation of the Direct Strain Imaging Method. In: Proceedings of the ASME 2013 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference, August 4-7, 2013, Portland, OR, IDETC/CIE 2013, DETC/CIE2013-13015. 11 p.