Combining displacement, strain, temperature and heat source fields to investigate the thermomechanical response of an elastomeric specimen subjected to large deformations
Combining displacement, strain, temperature and heat source fields to investigate the thermomechanical response of an elastomeric specimen subjected to large deformations
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DOI：
10.1016/j.polymertesting.2012.04.013
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发表时间：
2012-10
期刊：
影响因子：
5.1
通讯作者：
E. Toussaint;X. Balandraud;J. Cam;M. Grédiac
中科院分区：
文献类型：
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作者：
E. Toussaint;X. Balandraud;J. Cam;M. Grédiac
同时结合热学和运动学的全场测量在涉及材料热机械特性的社区中得到广泛接受。然而，在弹性体发生大变形的情况下获得这种有吸引力的信息会带来特定的实验问题，本文将对这些问题进行讨论。为了正确地写出热扩散方程，在同一参考坐标系中映射热量和运动量时出现了问题。这个方程提供了在热力学框架中构成相关量的热源。文中给出了程序，并详细说明了潜在的实际困难。然后将其应用于在所谓的三分支样本上执行的特定测试的情况。最后，对得到的应变分布和热源分布进行了简要的讨论。
Combining thermal and kinematic full-field measurements at the same time is gaining widespread acceptance in the community involved in the thermomechanical characterization of materials. However, obtaining such attractive information in the case of elastomers for which large deformations occur raises specific experimental issues which are addressed in this paper. The problem arises in mapping both the thermal and the kinematic quantities in the same reference coordinate system in order to write properly the heat diffusion equation. This equation provides heat sources which constitute a relevant quantity in the framework of thermomechanics. The procedure is presented and the underlying practical difficulties are detailed. It is then applied in the case of a specific test performed on a so-called three-branch specimen. Finally, the obtained strain and heat source distributions are briefly discussed.