Bi-material strip based temperature sensor design and optimization through thermo-mechanical multi-physics modeling  

作　　者：Baobao Tang Sarah Kathryn Collings Hai Xiao Huijuan Zhao 

机构地区：[1]Department of Mechanical Engineering,Clemson University,Clemson,SC,USA [2]Holcombe Department of Electrical and Computer Engineering,Clemson University,Clemson,SC,USA

出　　处：《International Journal of Smart and Nano Materials》2019年第1期1-10,I0001,共11页国际智能和纳米材料杂志（英文）

基　　金：This work was supported by the Department of Engineering,Office of Energy Efficiency and Renewable Energy under the contract DE-EE-0007683.

摘　　要：With the capability of additive manufacturing,complex structures are easily fabricated to achieve various design purposes.In this work,a bi-material strip temperature sensor with complex periodic pattern design is purposed and investigated through both the analytical modeling and multi-physics finite element analysis.Three design patterns are considered:standard,E-shape and S-shape.In the standard solid strip design,the curvature of the bi-material strip under temperature variation is in a linear relationship with the coefficient of thermal expansion(CTE)difference,but in a reciprocal relationship with the strip thickness.The curvature of the bi-material strip depends on the Young’s modulus ratio and layer thickness ratio of the two materials,but is independent of the magnitude of the materials’Young’s modulus.Based on analytical derivation and numerical validation,the optimized design parameters can be provided.Compared to S-shape pattern design,E-shape pattern design can significantly increase the temperature sensitivity of the bi-material strip.An analytical prediction of the E-shape pattern’s temperature sensitivity is introduced and discussed.This work proves the concept that new design space becomes available with the capability of additive manufacturing,and provides the general design guideline for a bi-material strip based temperature sensor with possible design patterns.

关 键 词：BI-MATERIAL temperature sensing OPTIMIZATION finite element analysis 

分 类 号：O34[理学—固体力学]