Abstract
A combined experimental and numerical approach was used to determine the mechanical properties of a chinchilla TM under quasi-static condition based on the response of the TM to static pressure. A chinchilla bulla was prepared and the intact TM was subjected to static pressures while its topography was measured using the micro-fringe projection technique. Images of the deformed TM were acquired and processed with a phase-shift method to reconstruct the surface profile and determine the volume displacement of the TM under pressures. Finite element method with the implementation of a hyperelastic model was employed. By solving the inverse problem with the model, the Young’s moduli of chinchilla TMs from ten bullas were determined as ~19 MPa up to a strain level of 25 %, changing with stress or strain.
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Acknowledgments
We acknowledge the support of NIH R01DC006632, R01DC011585, DOE NEUP 09-818, and NSF CMMI-1031829, CMMI-1132174, and ECCS-1307997. We also thank Zachary, Yokell, at University of Oklahoma for preparation of bullas. Lu acknowledges the Louis A. Beecherl Jr. Chair for additional support.
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Liang, J., Luo, H., Nakmali, D., Gan, R.Z., Lu, H. (2016). Characterization of the Nonlinear Elastic Behavior of Chinchilla Tympanic Membrane Using Micro-fringe Projection. In: Ralph, C., Silberstein, M., Thakre, P., Singh, R. (eds) Mechanics of Composite and Multi-functional Materials, Volume 7. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-21762-8_26
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DOI: https://doi.org/10.1007/978-3-319-21762-8_26
Publisher Name: Springer, Cham
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