3.1 Bolted Nozzle Flange Model Setup “Specify Material Properties” 2018
3.1 Bolted Nozzle Flange Model Setup “Specify Material Properties” 2018


We will now specify the
material properties, which you can think of specifying the
constants in the governing equations. So if I go back to the
governing equations, when I drag Static Structural
into the project page and I gave it volumes
for the geometry, it turned on– it knows that
it needs to solve the 3D equations that we can bring up. So these are turned on now. And the body forces are
turned off by default. So there’s nothing to specify here. No constants are appearing here. If I go to the constitutive model,
I have E, nu, and alpha as the three constants that I need to specify. So we’ll specify that
in material properties. And this term has not be turned on. This thermal strain and the bulk
preload have not been turned on. We’ll turn those on a little bit later. But they can specify alpha before that. And in the strain
displacement relations, there no constants appearing. So we need to specify E, nu and alpha. Let’s do that. I’ll go to the project page here and
Double Click on Engineering Data. I’ll add a new material. And I’ll say 300 Series Stainless
Steel Under Linear Elastic, I have Isotropic Elasticity. I need to change the
units to US Engineering. It’s not changed the units here,
so I need to also do that manually. So I’ll change it to PSI. And it is 2.9 e to the
power of seven PSI. And Poisson’s ratio is 0.27. And here, I have thermal strain,
so I will drop in Isotropic Secant Coefficient of Thermal Expansion. Ignore Isotropic Secant
and think of this for now as a coefficient of thermal expansion. And this is per Fahrenheit. And that value is 1 e to
the power of minus five. And these values are given
in the problem statement. And the Reference Temperature, it
asks for a Reference Temperature, so I’ll give it room temperature,
70 degrees Fahrenheit. It’s not going to– you know, we
are making material properties to be not dependent on temperature. So the Reference Temperature
shouldn’t affect my solution here. So the only thing that matters
are these three values. And that’s the materials for the nozzle,
the mid and the– the lower nozzle. And then we have another
material for the bolt. And I can just duplicate this. Double Click on it to rename it. So that’s A-286 Steel. And if I highlight that, the
Coefficient of Thermal Expansion is slightly different. It’s 9.5 e to the power of minus six. And the Young’s modulus is the same. The Poisson’s ratio is
also slightly different. And you can double check
that the values you have entered for these two materials are
the same as in the problem statement. Then I come back to project. And I say Refresh. So that will give me access
to those material properties. And then if I go back
to Answers Mechanical, I need to make sure that I
assign the right materials. So mid nozzle I will
change to 300 Series Steel. The lower nozzle, similarly. The bolt is A-286. And the nut is A-286. And now, the tool knows
what are the constants in the governing equations and the
additional equations that come with it.

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