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How to describe the influence of temperature to piezoresisitive effect
Posted Jan 15, 2018, 2:29 a.m. EST 0 Replies
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Hi
I want to find out the sensitivity of my piezoresitive strain gauge. In order to do that, based on the application:"piezoresistive pressure sensor".The expression of conductivity is sigma0(nd[m^3]).It makes me wonder and has no clue to understand this.I guess this is a default variable of comsol. My question is that ： I want to add the heat transfer in solids interface to piezoresistive effect . How should I acquire that？ Since here is the matrix that is defined by comsol : {58.8e-11[1/Pa]/sigma0(nd[m^3])[S/m], -27.2e-11[1/Pa]/sigma0(nd[m^3])[S/m], 58.8e-11[1/Pa]/sigma0(nd[m^3])[S/m], -27.2e-11[1/Pa]/sigma0(nd[m^3])[S/m], -27.2e-11[1/Pa]/sigma0(nd[m^3])[S/m], 58.8e-11[1/Pa]/sigma0(nd[m^3])[S/m], 0, 0, 0, 85.9e-11[1/Pa]/sigma0(nd[m^3])[S/m], 0, 0, 0, 0, 85.9e-11[1/Pa]/sigma0(nd[m^3])[S/m], 0, 0, 0, 0, 0, 85.9e-11[1/Pa]/sigma0(nd[m^3])[S/m]} However, how should I set if I also wanted to make the conductivity a function of temperature. Or how to add the temperature coeffcient of resistance in material properities.
Best Regards Sheng Qu
Hello S Q
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