Experiments and modeling of the thermo-mechanically coupled behavior of VHB
Experiments and modeling of the thermo-mechanically coupled behavior of VHB
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DOI：
10.1016/j.ijsolstr.2022.111523
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发表时间：
2022-03-03
影响因子：
3.6
通讯作者：
Chester, Shawn A.
中科院分区：
文献类型：
--
作者：
Alkhoury, Keven;Bosnjak, Nikola;Chester, Shawn A.
众所周知，温度对粘弹性体的总体机械性能具有显著影响。在这项工作中，我们调查的热机械耦合行为的VHB 4910使用相结合的实验和建模方法。我们首先通过在不同温度下进行一组大变形单轴实验来表征材料的行为。然后，我们对观察到的热机械行为进行建模，并将该模型校准到单轴实验。最后，该模型被实现为一个用户材料的子程序在有限元软件包进行验证的目的。这项工作的一个关键发现是，虽然增加温度加强了弹性的贡献，它同时减少了粘弹性的VHB的整体行为的贡献。
Temperature is well known to have a significant effect on the overall mechanical performance of viscoelas-tomers. In this work, we investigate the thermo-mechanically coupled behavior of VHB 4910 using a combined experimental and modeling approach. We first characterize the material behavior by performing a set of large deformation uniaxial experiments at different temperatures. We then model the observed thermo-mechanical behavior and calibrate that model to the uniaxial experiments. Lastly, the model is implemented as a user material subroutine in a finite element package for validation purposes. A key finding of this work is that while increasing the temperature stiffens the elastic contribution, it concurrently reduces the viscoelastic contribution to the overall behavior of VHB.