Define common parameters for a shape optimization, in this video, we'll explain topology optimization. And we'll defined shape optimization, materials, loads and constraints. Infusion 360, we want to get started with the supply dataset shape optimist gear. We're going to move from this gear in the design work space into the simulation workspace. In simulation, we need to get started by selecting shape optimization, when we select this option. You'll note that we have a small dialog telling us that this makes parts lightweight and structurally efficient. Based on the loads and boundary conditions applied to the geometry, that's not entirely the full story. When we talk about shape optimization, what we're looking at is the load path. Now, when we talk about simulations, were generally talking about finite element analysis for things like non linear or linear static stress analysis. When we talk about shape optimization, what we're really doing is we're taking a look at the load path and not necessarily the magnitude or the response. So we're going to create a shape optimization study and we're going to take a quick look at the user interface. To see how it differs from something like a linear static stress analysis. On the left hand side, we have a simulation model, a study and then we have the various parameters that define this type of study. Notice that we have a shape optimization, target, materials, settings and then we have our loads and contacts. From here, we want to make sure that we are dealing with just a single gear. We're going to begin by specifying the material and then we're going to talk about the way in which we set up and define a shape optimization study. So let's get started by first going to study materials, note that by default it's steel and we're going to be using that UHMW black plastic. So we're going to scroll all the way to the bottom of our list and will select UHMW, we're going to select okay. And now we have applied that material and note the appearance does change. We can modify that by turning off the display study material colors if we want to show it in the default gray. Next we want to make sure that we're dealing with the correct geometry. It's important to note that when we take a look at shape optimization, we do have a symmetry plane. This allows us to create a shape optimist part with symmetry but since we're dealing with a circular or revolved part. We're actually going to use a quarter section, to do this, we want to make sure that we go to simplify. We're going to expand our model components, expand the spur gear and make sure that we are only dealing with one body. Since we know that we have one body, I'm going to start by selecting the top face, I'm going to create a sketch. We're going to use our center diameter circle from the origin and we want to go out. And make sure that we're completely encompassing the center point of the gear. So once we've selected that center point, we zoom in, note that we do have a small amount of the edge of the gear left. We have to be careful here, so we want to make sure that we hit escape to get off our circle tool. We begin to drag this out just slightly and I'm going to apply a diameter of 100mm. From here, we're going to finish the sketch and we're going to create an extrude. Going to drag across the entire body to select all the geometry and I'm going to deselect the center hub. And rotate this around and for our extent type will select two objects and go to the bottom. By default, it's going to try to remove material but we want to actually join these two together. We're not interested in the teeth of the gear, but we want to talk about the way that the load is distributed inside of the part. So we're going to go back to home view and finish our simplify, now that we have the basis of the gear. We need to make sure that we can create a quarter section, again in shape optimization, we have a symmetry plane which allows us to select active planes. If we go into our model components and we expand our spur gear and we expand the origin. We can take a look at the planes that we have XZ and YZ, these are two different planes. So if we select active plains, note that we are able to select multiple planes. When we select one and three, we are able to create that quarter symmetry. If we say, okay, then we're focusing on just one quarter of the body while this works out great. If you need to deal with more than quarter symmetry, you can do this manually. So in the shape optimization settings under symmetry plane, we can simply deselect that. But notice that it's still showing at least one case of symmetry, when we go into our targets. And we go into our settings, you'll note that we have our symmetry plane here. We can delete the symmetry plane and get back to that original model. Let's go back into Simplify and let's create another sketch, this time we're going to use our line tool and we're going to create our own quarter section. We'll do this by simply dragging the lines out and then we'll use extrude once more but this time we're going to allow it to remove material. Now, we're left with a quarter section but this time we're not using the symmetry planes. Once again, we could use symmetry and in most cases the symmetry planes will be a great option. However, it's important that we understand the different ways in which we can perform those actions. I'm going to minimize my model components and I want to focus on some of the other settings that we need to worry about. Next, we're going to talk about loads and constraints, I'm going to go to my structural constraints. And I want to fix the outside face and it's going to be fixed in the X, Y and Z directions. Note that we can also add additional structural constraints for things like frictionless on the symmetry faces. Once we have those, we need to apply a load, for this example, I'm going to be using a moment load on the inside of the hub. I'm going to change my units to pound force per inch and I want to set this to 36. This is the largest force that we're taking a look at for our gear train, so this one is going to be applied at the center. Note that there are some other direction type options we could choose, vector's angle or normal. But since we're applying a moment, simply selecting that face is going to work for us. Before we save, let's make sure that we go back to a home view and again, let's understand that we're taking a look at load paths. We're not looking at a structural analysis on whether or not the gear is going to be strong enough. But we're simply looking at how the load is going to be transferred through the gear, let's make sure that we saved before moving on to the next step.