聚二甲基硅氧烷超弹性本构模型表征的数值分析与验证

IF 0.6 Q3 MULTIDISCIPLINARY SCIENCES
Sana Zulfiqar, Abdullah Aziz Saad, Zulkifli Ahmad, Feizal Yusof, Zuraihana Bachok
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引用次数: 0

摘要

近年来研究最多的弹性体是聚二甲基硅氧烷(PDMS),它在各种工程工业中有多种用途。PDMS的关键特性之一是其超弹性特性,这使得传感器、柔性电路、换能器和天线的生产成为可能。本研究使用超弹性本构模型来预测不可压缩、各向同性和超弹性材料PDMS在单轴拉伸下的力学行为。这些模型是由应变能密度和应力函数组成的曲线拟合工具。为了进行分析,提出了一种新的PDMS衬底配方,并进行了拉伸试验以评估其应力-应变行为。实验数据使用Abaqus在各种超弹性模型上实现,如Mooney-Rivlin, Yeoh, Ogden和简化多项式模型。通过计算R2值来评价各模型的拟合优度。因此,在这些模型中,包含6个材料常数的简化多项式模型具有最高的R2值(0.9936),被认为是其他模型中最适合的模型。并将该模型的材料常数应用于Abaqus中PDMS的三维哑铃形模型进行验证。模型采用与实验装置相似的边界条件,一端固定位移33 mm,另一端固定全自由度。考虑到材料的网格质量和网格灵敏度,采用了线性配方(C3D8RH)的各种网格尺寸,并选择了与实验结果非常接近的最佳网格尺寸。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical Analysis and Validation of Characterization of Polydimethylsiloxane Using Hyper-elastic Constitutive Models
The most researched elastomer in recent years is polydimethylsiloxane (PDMS), which has several uses in various engineering industries. One of the PDMS’s key characteristics is its hyper-elasticity nature, which enables the production of sensors, flexible electrical circuits, transducers, and antennas. This study used the hyper-elastic constitutive models to predict the mechanical behavior of incompressible, isotropic, and hyper-elastic material PDMS under uniaxial tension. These models are curve-fitting tools that consist of strain energy density and stress functions. To pursue the analysis, a new formulation of PDMS substrate was proposed, and a tensile test was performed to evaluate its stress-strain behavior. The experimental data was implemented on various hyper-elastic models using Abaqus, like Mooney-Rivlin, Yeoh, Ogden, and reduced polynomial models. The goodness of fit of every model was evaluated by calculating R2 values. Consequently, among these models, the reduced polynomial model with 6 material constants possessed the highest R2 value (0.9936) and was considered the best-fit model among the other models. Furthermore, the material constants of this model were applied to the 3D dumbbell-shaped model of PDMS in Abaqus for its validation. The boundary conditions were applied on the model similar to the experimental setup, as 33 mm displacement on one end and the other was fixed with all DOF. For mesh quality and mesh sensitivity of the material, various mesh sizes with the linear formulation (C3D8RH) were utilized, and the best mesh size was selected to evaluate very close results with the experimental.
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来源期刊
Pertanika Journal of Science and Technology
Pertanika Journal of Science and Technology MULTIDISCIPLINARY SCIENCES-
CiteScore
1.50
自引率
16.70%
发文量
178
期刊介绍: Pertanika Journal of Science and Technology aims to provide a forum for high quality research related to science and engineering research. Areas relevant to the scope of the journal include: bioinformatics, bioscience, biotechnology and bio-molecular sciences, chemistry, computer science, ecology, engineering, engineering design, environmental control and management, mathematics and statistics, medicine and health sciences, nanotechnology, physics, safety and emergency management, and related fields of study.
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