Use of Digital Image Correlation Method to Measure Bio-Tissue Deformation
| Autor: | Liang-Wei Chang, Nhat Minh Dang, Ming-Tzer Lin, Wei-Yu Ku, Terry Yuan-Fang Chen, Zhao-Ying Wang, Yu-Lung Lo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Digital image correlation
Materials science 02 engineering and technology 01 natural sciences Viscoelasticity Displacement (vector) 010309 optics 0103 physical sciences Materials Chemistry Calibration digital image correlation Mueller calculus Strain gauge Mathematical analysis bio-tissue deformation inverse distorted calibration Surfaces and Interfaces 021001 nanoscience & nanotechnology Engineering (General). Civil engineering (General) Surfaces Coatings and Films correlation criteria Deformation (engineering) TA1-2040 0210 nano-technology Extensometer |
| Zdroj: | Coatings Volume 11 Issue 8 Coatings, Vol 11, Iss 924, p 924 (2021) |
| ISSN: | 2079-6412 |
| DOI: | 10.3390/coatings11080924 |
| Popis: | Traditionally, strain gauge, extensometer, and reflection tracking markers have been used to measure the deformation of materials under loading. However, the anisotropy and inhomogeneity of most biological materials restricted the accessibility of the real strain field. Compared to the video extensometer, digital image correlation has the advantage of providing full-field displacement as well as strain information. In this study, a digital image correlation method (DIC) measurement system was employed for chicken breast bio-tissue deformation measurement. To increase the contrast for better correlation, a mixture of ground black pepper and white sesame was sprayed on the surface of samples. The first step was to correct the distorted image caused by the lens using the inverse distorted calibration method and then the influence of subset size and correlation criteria, sum of squared differences (SSD), and zero-normalized sum of squared differences (ZNSSD) were investigated experimentally for accurate measurement. Test results of the sample was translated along the horizontal direction from 0 mm to 3 mm, with an increment of 0.1 mm and the measurement result was compared, and the displacement set on the translation stage. The result shows that the error is less than 3%, and accurate measurement can be achieved with proper surface preparation, subset size, correlation criterion, and image correction. Detailed examination of the strain values show that the strain εx is proportional to the displacement of crosshead, but the strain εy indicates the viscoelastic behavior of tested bio-tissue. In addition, the tested bio-tissue’s linear birefringence extracted by a Mueller matrix polarimetry is for comparison and is in good agreement. As noted above, the integration of the optical parameter measurement system and the digital image correlation method is proposed in this paper to analyze the relationship between the strain changes and optical parameters of biological tissue, and thus the relative optic-stress coefficient can be significantly characterized if Young’s modulus of biological tissue is known. |
| Databáze: | OpenAIRE |
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