Please use this identifier to cite or link to this item: https://doi.org/10.1117/12.839336
Title: Soft tissue strain measurement using an optical method
Authors: Lok, T.S. 
Jui, T.C. 
James, G.C.H. 
Keywords: Digital image correlation
Ligament tissues
Optical method
Strains
Issue Date: 2009
Source: Lok, T.S.,Jui, T.C.,James, G.C.H. (2009). Soft tissue strain measurement using an optical method. Proceedings of SPIE - The International Society for Optical Engineering 7375 : -. ScholarBank@NUS Repository. https://doi.org/10.1117/12.839336
Abstract: Digital image correlation (DIC) is a non-contact optical technique that allows the full-field estimation of strains on a surface under an applied deformation. In this project, the application of an optimized DIC technique is applied, which can achieve efficiency and accuracy in the measurement of two-dimensional deformation fields in soft tissue. This technique relies on matching the random patterns recorded in images to directly obtain surface displacements and to get displacement gradients from which the strain field can be determined. Digital image correlation is a well developed technique that has numerous and varied engineering applications, including the application in soft and hard tissue biomechanics. Chicken drumstick ligaments were harvested and used during the experiments. The surface of the ligament was speckled with black paint to allow for correlation to be done. Results show that the stress-strain curve exhibits a bi-linear behavior i.e. a "toe region" and a "linear elastic region". The Young's modulus obtained for the toe region is about 92 MPa and the modulus for the linear elastic region is about 230 MPa. The results are within the values for mammalian anterior cruciate ligaments of 150-300 MPa. © 2009 SPIE.
Source Title: Proceedings of SPIE - The International Society for Optical Engineering
URI: http://scholarbank.nus.edu.sg/handle/10635/73869
ISSN: 0277786X
DOI: 10.1117/12.839336
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