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Measuring the nonlinear elastic properties of tissue-like phantoms

机译:测量组织状体模的非线性弹性特性

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摘要

A direct mechanical system simultaneously measuring external force and deformation of samples over a wide dynamic range is used to obtain force-displacement curves of tissue-like phantoms under plain strain deformation. These measurements, covering a wide deformation range, then are used to characterize the nonlinear elastic properties of the phantom materials. The model assumes incompressible media, in which several strain energy potentials are considered. Finite-element analysis is used to evaluate the performance of this material characterization procedure. The procedures developed allow calibration of nonlinear elastic phantoms for elasticity imaging experiments and finite-element simulations.
机译:使用直接机械系统同时测量宽动态范围内样品的外力和变形,以获取在普通应变变形下组织状体模的力-位移曲线。这些测量涵盖了较大的变形范围,然后用于表征幻影材料的非线性弹性特性。该模型假设不可压缩的介质,其中考虑了几个应变能势。有限元分析用于评估该材料表征过程的性能。开发的程序允许校准非线性弹性体模,以进行弹性成像实验和有限元模拟。

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