Determination of Dynamic Material Properties of Silicone Rubber Using One-Point Measurements and Finite Element Simulations
Determination of Dynamic Material Properties of Silicone Rubber Using One-Point Measurements and Finite Element Simulations
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DOI：
10.1109/tim.2012.2203449
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发表时间：
2012-11-01
影响因子：
5.6
通讯作者：
Lerch, Reinhard
中科院分区：
文献类型：
--
作者：
Ilg, Juergen;Rupitsch, Stefan J.;Lerch, Reinhard
动态杨氏模量，泊松比，和硅橡胶的阻尼因子是从激光三角测量的顶部表面运动的平的圆柱形样品由振动器激发。这些材料参数是基于逆方法来估计的，该逆方法使测量数据与有限元模型（FEM）的预测之间的差异最小化，其中所寻求的材料数据是可调整的参数。测量结果在10-400 Hz的频率范围内，在大气压力和温度条件下。首先，将测量数据与使用恒定材料参数的有限元预测进行比较，以显示原则上的材料行为。之后，模量和泊松比的频率依赖性通过在小频率范围内匹配测量与模拟来确定。最后给出了材料参数随频率的变化曲线。灵敏度分析表明所提出的方法的准确性。本文的动机是需要一个精确的描述声带模型，通常由硅橡胶制成。
The dynamic Young's modulus, Poisson's ratio, and the damping factor of silicone rubber are determined from a laser triangulation measurement of the top surface motion of a flat cylindrical sample excited by a shaker. These material parameters are estimated on the basis of an Inverse Method that minimizes the difference between measured data and a prediction from a finite-element model (FEM), in which the sought-after material data are the adjustable parameters. The results are presented for measurements within the 10-400-Hz frequency range under atmospheric pressure and temperature conditions. At first, the measured data are compared with FEM predictions using constant material parameters to show the material behavior in principle. Afterward, the frequency dependence of the moduli and Poisson's ratios are determined by matching measurements with simulations within small frequency ranges. Finally, the material parameters determined are given as functions versus frequency. A sensitivity analysis shows the accuracy of the presented method. This paper is motivated by the need for a precise description of vocal fold models, commonly manufactured from silicone rubber.