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Entry  Mon Sep 17 19:06:36 2012, tara, Notes, PMC, stainless steel pmc 
    Reply  Mon Sep 24 16:41:19 2012, tara, Notes, PMC, stainless steel pmc pzt_snap.png
       Reply  Thu Nov 15 00:33:01 2012, tara, Notes, PMC, stainless steel pmc 
          Reply  Thu Nov 15 18:59:17 2012, tara, Notes, PMC, stainless steel pmc IMG_1982.jpg
Message ID: 1077     Entry time: Thu Nov 15 00:33:01 2012     In reply to: 1052     Reply to this: 1078
Author: tara 
Type: Notes 
Category: PMC 
Subject: stainless steel pmc 

Kriten sent me solidwork part files for the steel pmc.  I'm checking all the parts and will decide what material we want to use.

She reported that a ss pmc will have the first body mode at 780 Hz, while an aluminum one will have the first body mode at 1kHz. But we have to take thermal expansion, stiffness into account. here are some material properties

 

  Stainless steel AL
Thermal expansion coeff x10^-6 16 22.2
Young modulus    [GPa] 180 69
density   x10^3 kg/m^3 7.8 - 8

2.7

I think the thermal expansion will be a problem, but their thermal expansion coefficients are not that different. I don't know about stiffness of the body. I'll ask someone about this. Otherwise Al might be a better material if we look for higher resonant frequency.

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