Viscoelastic Material Properties of the Myocardium and Cardiac Jelly in the Looping Chick Heart

作者: Jiang Yao , Victor D. Varner , Lauren L. Brilli , Jonathan M. Young , Larry A. Taber

DOI: 10.1115/1.4005693

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摘要: Accurate material properties of developing embryonic tissues are a crucial factor in studies the mechanics morphogenesis. In present work, we characterize viscoelastic looping heart tube chick embryo through nonlinear finite element modeling and microindentation experiments. Both hysteresis ramp-hold experiments were performed on intact isolated cardiac jelly (extracellular matrix). An inverse computational method was used to determine constitutive relations for myocardium jelly. With both layers assumed be quasilinear viscoelastic, coefficients an Ogden type strain-energy density function combined with Prony series two terms or less determined by fitting numerical results from simplified model segment experimental data. The techniques can applied generally determining tissues.

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