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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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Piezoresistive Beam

Posted Aug 29, 2012, 3:53 p.m. EDT MEMS & Nanotechnology, MEMS & Piezoelectric Devices, Modeling Tools & Definitions, Parameters, Variables, & Functions, Studies & Solvers, Structural Mechanics Version 4.3 1 Reply

Bahar
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Does anyone here uses Piezoresitive module for modeling a piezoresistive beam? Or has any example which s/he can send for me?
I am really confused about the results and I need to take a look at one example.


When I model a beam with Si3N4 and P doped silicon in Electromechanical module I get reasonable value for deflection but in this module I can not measure change on current (or resistance due to deflection)
When I model the same beam in Piezoresistive module the deflection is far beyond reasonable values (like 10^8 more!!)
I have no idea what is the problem.
1 Reply Last Post Nov 13, 2015, 3:05 p.m. EST
COMSOL Moderator

Hello Bahar

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Abdullah Siddiqui
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Posted: 9 years ago Nov 13, 2015, 3:05 p.m. EST
It's been 3 years but I would really like to know about your piezoresistive beam.
I want to design a beam and place 4 piezoresistors on it in a wheatstone bridge connection.

Any help?

It's been 3 years but I would really like to know about your piezoresistive beam. I want to design a beam and place 4 piezoresistors on it in a wheatstone bridge connection. Any help?

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