Digital-image-correlation-based thermomechanical diagnostics of Bismuth Telluride pillars in a thermoelectric cooler

Yiyuan Zhang, Wenlan Li,Zeren Gao,Yang Liu,Peng Zhang,Yang Zhao

Optics and Lasers in Engineering（2022）

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摘要

•Digital image correlation based on laser speckle proves suitable for thermomechanical diagnostics of TEC pillar.•Direct observation of full-court pillar-level deformation is achieved•Thermally induced global displacement and strain fields of TEC pillar are obtained.•Maximum shear stress exceeds the fracture limit.

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关键词

Thermoelectric cooler,Device reliability,Mechanical damage,Fracture,Thermal stress,Digital image correlation

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