martensitic stainless steel spring stress at low temperature
martensitic stainless steel spring stress at low temperature
(OP)
Hi,
I'm doing stress analysis using solidworks on a martensitic stainless steel spring that is operating cyclically at -30C ambient temperature. The analysis at room temperature results in a max stress of around 80 ksi. When I apply a temperature load to the analysis, the resulting max stress is around 100 ksi. Does this result make sense? Is this due to thermal stresses in the part?
Thanks,
-Dave
I'm doing stress analysis using solidworks on a martensitic stainless steel spring that is operating cyclically at -30C ambient temperature. The analysis at room temperature results in a max stress of around 80 ksi. When I apply a temperature load to the analysis, the resulting max stress is around 100 ksi. Does this result make sense? Is this due to thermal stresses in the part?
Thanks,
-Dave





RE: martensitic stainless steel spring stress at low temperature
RE: martensitic stainless steel spring stress at low temperature
I don't think this is due to thermal stresses. Can you share the constraints and boundary conditions for the part/assembly? This may be due to higher elastic modulus at lower temperature. Can you look at the software's material property database and see what is has?
RE: martensitic stainless steel spring stress at low temperature
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Plymouth Tube
RE: martensitic stainless steel spring stress at low temperature
It is made of custom 455. There is no temperature vs. elastic modulus data defined in solidworks right now. I guess I probably posted in the wrong forum because it seems the difference is likely due to how I am simulating rather than an effect due to material properties. I have one end fixed and I'm deflecting the other end by a fixed amount.
Thanks for the help
RE: martensitic stainless steel spring stress at low temperature
It is a martensitic precipitation hardening alloy.
I am still not sure that it will have usable ductility at -30.
You should get some temperature dependent properties to use.
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Plymouth Tube
RE: martensitic stainless steel spring stress at low temperature
Ductility would not appear to be an issue at -30degC.
There's no data for E other than RT values (28.5x10^6 psi).
Hope that helps.
Terry