Soft tissue non-slip mechanical testing research at University of Cincinnati Friction and slippage are common obstacles when mechanically testing soft tissue. The mechanical response of soft liver tissue is commonly characterized from unconfined uniaxial compression experiments on cylindrical samples. However, friction and slippage between the sample and the compression platens is inevitable. At the University of Cincinnati, researchers developed a series of correction factors that enable them to perform tests with no-slip experiments. These materials characterization tests were performed on liver tissue using a TestResources 100R tissue test machine. The researchers’ approach was to extract the nonlinear material properties of soft liver tissue directly from no-slip experiments using a set of computationally determined correction factors. Results show that the apparent material properties, i.e. those determined from no-slip experiments ignoring the no-slip conditions, can differ from the true material properties by as much as 50% for the exponential material model. The proposed correction approach allows them to determine the true material parameters directly from no-slip experiments and can be easily extended to other forms of hyperelastic material models. To learn more about this study conducted at the University of Cincinnati, click the link below. Liver Tissue Materials Properties derived from No Slip Uniaxial Compression Tests
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