Institute of General Mechanics, RWTH Aachen University, Templergraben 64, D-52062 Aachen, Germany.
J Mech Behav Biomed Mater. 2018 Jun;82:1-8. doi: 10.1016/j.jmbbm.2018.02.015. Epub 2018 Mar 9.
The underlying research work introduces a study of the mechanical properties of polycarbonate urethane (PCU), used in the construction of various medical devices. This comprises the discussion of a suitable material model, the application of elemental experiments to identify the related parameters and the numerical simulation of the applied experiments in order to calibrate and validate the mathematical model. In particular, the model of choice for the simulation of PCU response is the non-linear viscoelastic Bergström-Boyce material model, applied in the finite-element (FE) package Abaqus®. For the parameter identification, uniaxial tension and unconfined compression tests under in-laboratory physiological conditions were carried out. The geometry of the samples together with the applied loadings were simulated in Abaqus®, to insure the suitability of the modelling approach. The obtained parameters show a very good agreement between the numerical and the experimental results.
本基础研究工作介绍了聚碳酸酯聚氨酯（PCU）机械性能的研究，该材料用于各种医疗设备的构建。这包括讨论合适的材料模型、元素实验应用以确定相关参数以及应用实验的数值模拟，以校准和验证数学模型。特别是，选择用于模拟 PCU 响应的模型是非线性粘弹性 Bergström-Boyce 材料模型，应用于有限元（FE）包 Abaqus®。为了进行参数识别，在实验室生理条件下进行了单轴拉伸和无约束压缩试验。在 Abaqus®中模拟了样品的几何形状和所施加的载荷，以确保建模方法的适用性。得到的参数表明，数值结果和实验结果之间非常吻合。
