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Strain measurement of polymer materials by digital image correlation combined with finite-element analysis

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Abstract

Digital image correlation (DIC) can provide deformation information of a specimen by processing its two digital images captured before and after the deformation. In this study, a DIC method based on a modified coarse–fine iterative method is combined with finiteelement analysis to obtain the strain and displacement data. This method is first verified with the use of an aluminum specimen under uniaxial testing. For polymer materials, polypropylene specimens with and without short glass fibers and polydimethylesiloxane specimens with and without dyes are tested. Results indicate that the present method can capture the strains of these specimens even under high elongation and without artificial speckle pattern on their surfaces. Thus, the mechanical behavior of polymer materials can be characterized and the effects of additional ingredients added to the materials can be assessed through the developed DIC method.

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Authors and Affiliations

  1. Department of Mechanical Engineering, National Yunlin University of Science and Technology, Douliu, Yunlin, 64002, Taiwan, ROC

    Shun-Fa Hwang, Min-Chien Shen & Bin-Bin Hsu

Authors
  1. Shun-Fa Hwang
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  2. Min-Chien Shen
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  3. Bin-Bin Hsu
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Correspondence to Shun-Fa Hwang.

Additional information

Recommended by Associate Editor Heung Soo Kim

Shun-Fa Hwang received his Ph.D. degree in mechanical engineering from the University of California, Los Angeles, USA, in 1992. He then joined the faculty of the Mechanical Engineering Department of National Yunlin University of Science and Technology, Taiwan, where he was promoted as full professor in 2001. His research interests include composite structure design, digital image correlation and vibration and sound.

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Hwang, SF., Shen, MC. & Hsu, BB. Strain measurement of polymer materials by digital image correlation combined with finite-element analysis. J Mech Sci Technol 29, 4189–4195 (2015). https://doi.org/10.1007/s12206-015-0913-4

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  • DOI: https://doi.org/10.1007/s12206-015-0913-4

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