Datasets for Comprehensive Hyperelastic Constitutive Modeling and Analysis of Multi-Elastic Polydimethylsiloxane (PDMS) for Wearable Device Applications

To replicate the mechanical properties of polydimethylsiloxane (PDMS) in finite element method (FEM), an accurate constitutive model is required, preferably one that encompasses a wide range of PDMS elasticity. In this study, using commercial COMSOL Multiphysics FEM software, we determine Mooney-Rivlin 5 parameters as the best hyperelastic model fitted against PDMS experimental data, and proceed to construct a parameter correlation plot combining PDMS of different concentrations together. Experimental validation is then performed using parameters extracted from this plot, showing good agreement between simulation and experimental result. In addition, to reflect model applicability, simulations related to basic mechanical deformations involved in wearable devices (compression, stretching, bending and twisting) are performed and analyzed. Further analysis is also performed to investigate the effect of combining different experimental datasets as input into the model. These datasets include COMSOL mph file containing the setup related to Levenberg-Marquardt least squares method for fitting the main PDMS samples' experimental data (Excel files) to Mooney-Rivlin 5 parameters model. Also included are COMSOL mph files for compression, stretching, bending and twisting simulations.

为在有限元法（FEM）中复现聚二甲基硅氧烷（PDMS）的力学性能，需采用精准的本构模型，优选可覆盖宽范围PDMS弹性行为的模型。本研究依托商用COMSOL Multiphysics有限元软件，将适配PDMS实验数据的莫尼-里夫林5参数（Mooney-Rivlin 5 parameters）模型确定为最优超弹性模型，并构建了结合不同浓度PDMS的参数相关性图谱。随后利用该图谱提取的参数开展实验验证，结果显示仿真与实验结果吻合良好。此外，为验证模型的适用性，针对可穿戴设备涉及的基础力学变形（压缩、拉伸、弯曲与扭转）开展仿真并进行分析。本研究还开展了进一步分析，以探究将不同实验数据集作为模型输入的影响。本数据集包含两类COMSOL mph文件：一类用于将PDMS主样本实验数据（Excel文件）拟合至莫尼-里夫林5参数模型，其内置莱文贝格-马夸特（Levenberg-Marquardt）最小二乘法相关设置；另一类用于压缩、拉伸、弯曲及扭转仿真。