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.