Development and parameter identification of a visco-hyperelastic model for the periodontal ligament
Development and parameter identification of a visco-hyperelastic model for the periodontal ligament
复制标题
牙周膜粘超弹模型的开发和参数识别
DOI：
10.1016/j.jmbbm.2017.01.035
复制
发表时间：
2017-04-01
影响因子：
3.9
通讯作者：
Yan, Bin
中科院分区：
文献类型：
--
作者：
Huang, Huixiang;Tang, Wencheng;Yan, Bin
本研究开发并实施了一种新的粘超弹性模型，该模型能够预测牙周膜随时间变化的生物力学行为。本构模型已通过用户定义的材料子程序 (UMAT) 实现到有限元包 ABAQUS 中。应力响应被分解为两个并行的本构部分，即超弹性应力响应和瞬态粘弹性应力响应。为了确定模型参数，建立了基于V-W超弹性模型的压痕方程和压痕蠕变模型。然后通过将它们与相应的 PDL 纳米压痕实验数据进行拟合来确定参数。通过有限元分析模拟纳米压痕实验，以验证粘超弹模型。模拟结果与实验数据吻合良好，这表明所开发的粘超弹模型能够准确预测 PDL 随时间变化的力学行为。
The present study developed and implemented a new visco-hyperelastic model that is capable of predicting the time-dependent biomechanical behavior of the periodontal ligament. The constitutive model has been implemented into the finite element package ABAQUS by means of a user-defined material subroutine (UMAT). The stress response is decomposed into two constitutive parts in parallel which are a hyperelastic and a time-dependent viscoelastic stress response. In order to identify the model parameters, the indentation equation based on V-W hyperelastic model and the indentation creep model are developed. Then the parameters are determined by fitting them to the corresponding nanoindentation experimental data of the PDL. The nanoindentation experiment was simulated by finite element analysis to validate the visco-hyperelastic model. The simulated results are in good agreement with the experimental data, which demonstrates that the visco-hyperelastic model developed is able to accurately predict the time-dependent mechanical behavior of the PDL.