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Thermoelectric performance and stress analysis on wearable thermoelectric generator under bending load

机译：弯曲载荷下可穿戴热电发电机的热电性能和应力分析

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摘要

With the growing popularity of flexible micro-electronics and health-monitoring sensors, wearable flexible thermoelectric generators (TEGs) are receiving attention due to their ability to convert body heat into electricity. In this study, a three-dimensional model of wearable TEGs encapsulated in the PDMS material is established based on the nonlinearly coupled thermoelectric transport constitutive law, large deformation of materials, and the 3-parameter Mooney-Rivlin nonlinear hyperelastic constitutive law of polydimethylsiloxane (PDMS) material. The thermoelectric performance and mechanical reliability of the wearable TEG are investigated under the bending load by employing finite element method. A com-parison between numerical results and experimental data is conducted for validation of the model. Ef-fects of the leg shape, filling factor and height of the legs are examined on the thermoelectric performance and mechanical reliability of the wearable TEGs. The optimized dimensions of wearable thermoelectric generators are obtained and analyzed. The results show that, thermoelectric performance and flexibility of the wearable TEG can be enhanced by increasing the number of thermocouples in the TEG. The results of this paper provide useful suggestions for the structural design and practical appli-cation of wearable TEGs encapsulated in PDMS materials.(c) 2021 Elsevier Ltd. All rights reserved.
机译：随着柔性微电子和健康监测传感器的日益普及，可穿戴柔性热电发电机（TEG）由于其将体热转化为电力而受到关注。在该研究中，基于非线性耦合的热电传输本构概述，大的材料变形以及3参数Mooney-rivlin非线性超弹性组成型 - 聚二甲基硅氧烷（PDMS）（PDMS ） 材料。通过采用有限元法在弯曲载荷下研究可穿戴式TEG的热电性能和机械可靠性。进行数值结果和实验数据之间的COM-Parish用于验证模型。检查腿部形状，填充因子和腿的高度的EF-接受可穿戴TEG的热电性能和机械可靠性。获得并分析可穿戴热电发电机的优化尺寸。结果表明，通过增加TEG中的热电偶数，可以增强可穿戴TEG的热电性能和柔韧性。本文的结果为封装在PDMS材料中的可穿戴性TEG的结构设计和实际应用的方法提供了有用的建议。（c）2021 Elsevier Ltd.保留所有权利。

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