Details

Autor(en) / Beteiligte

• Liang, Junfeng
• Luo, Huiyang
• Yokell, Zachary
• Nakmali, Don U.
• Gan, Rong Zhu
• Lu, Hongbing

Titel

Characterization of the nonlinear elastic behavior of chinchilla tympanic membrane using micro-fringe projection

Ist Teil von

• Hearing research, 2016-09, Vol.339, p.1-11

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2016

Quelle

ScienceDirect

Beschreibungen/Notizen

• The mechanical properties of an intact, full tympanic membrane (TM) inside the bulla of a fresh chinchilla were measured under quasi-static pressure from −1.0 kPa to 1.0 kPa applied on the TM lateral side. Images of the fringes projected onto the TM were acquired by a digital camera connected to a surgical microscope and analyzed using a phase-shift method to reconstruct the surface topography. The relationship between the applied pressure and the resulting volume displacement was determined and analyzed using a finite element model implementing a hyperelastic 2nd-order Ogden model. Through an inverse method, the best-fit model parameters for the TM were determined to allow the simulation results to agree with the experimental data. The nonlinear stress-strain relationship for the TM of a chinchilla was determined up to an equibiaxial tensile strain of 31% experienced by the TM in the experiments. The average Young's modulus of the chinchilla TM from ten bullas was determined as approximately 19 MPa. •Mechanical behavior of chinchilla TM was characterized under pressure loading.•TM topography in reference/deformed state was determined by micro-fringe projection.•Volume displacement was determined as a function of positive or negative pressure.•Finite element implementing hyperelastic model was used to simulate TM response.•Young's moduli of chinchilla TM was determined as 19 MPa up to a strain level of 25%.