Join Gabriel Corbett for an in-depth discussion in this video Model preparation, part of SOLIDWORKS: SimulationXpress.
- [Tutor] In Solidworks, before we can run a simulation, a lot of times we need to do some prep to our model. Now, you can see here, I've got a really simple rod and I want to put a bearing on the other side of this and then I want to have some type of load in the center bit and I want to be able to run an analysis. However, if I choose the outside Surface here, it just picks the entire Surface, so what I need to do is kind of break that up to the sections where the bearings might be supports and then maybe put another section, where the load's going to be and really kind of define this model, so it's set up and ready to run an analysis on.
Now, Solidworks does have some nice tools, already set up to do this over here under Analysis Preparation. If you don't have that toolbar, of course, you can turn it on, right click and down here, Analysis Preparation and there it is. So, we can add geometry like Planes in a part and that's a really good way to do it. You can add individual Features sometimes, if you don't have like a little button or something on a pull on, create a little Boss-Extrusion, like that or revolve something round that you can then pull on. It's a great way to do it. The other thing we can do is create Surfaces. Here's a prime example of a Surface, if I choose a Sketch, start a Sketch and just click on like an edge and say, well, you know I'd like to convert that entity over, and then come back over here and go to Surface, and let's just do an Extruded Surface, let's go in the other direction, and let's say one inch.
Now I've created a Surface directly on top of this section here. So then, using that Surface, I can apply a Force just to the end of that rod and that works pretty good. The other thing you could do is go to something like the Front Plane, or the Top Plane or the Right Plane here. Start a Sketch and then kind of just divvy this up, so in the center you might want to have the section where you're going to be loading it. Over here on the right you might be adding a section here, where you're going to be putting a bearing and over here on the other side, you might be adding another bearing.
So really just divvy that up to however you'd like. Now of course, you can add dimensions to make this as fancy as you'd like, but then we want to use a Split Line. So I'm going to take this Sketch here, and I'm going to split this Surface here. And if I choose the Surface here and choose that, and I'm going to project it, click OK. You can see I've sliced that Surface up into multiple Surfaces. Now you can choose individual Surfaces to apply Forces or Constraints to the model, when I start going into an analysis.
So, let's quickly do that. A couple of different options, I'm going to go ahead and hide that Surface right now, 'cause I don't really need that for this example, but it's another way we could use it. So, let's go over here and go to Evaluate, SimulationXpress, come down to Next. Let's go ahead and Add a Fixture, and we go ahead and hold that Surface and that one right there, alright, click OK. Then let's go ahead and Add a Force on that Surface right there. I'd like to place that going downwards.
So, go ahead and click on Selected Direction, and then we're going to go ahead and choose the Top Plane, so it's going to be going down or up, and I want to reverse the direction, so it's going to be going down. I want to use inches, or inch pound second and let's go ahead and put 200 pounds of Force, going down, click OK, and go ahead and click on Next. Let's go ahead and choose our Material, and how about 304 Stainless Steel, apply that and close it, click on Next, Run Simulation. It's performing similar to the way you'd expect it to.
We are saying that these Surfaces down here are completely fixed, like in a vice or a clamp and that's really not the case if they're going to be actually rolling bearings and some of those bearings have some self-alignment to them, so it's probably not going to be exactly like that, but it might be similar and it's also assuming that there's no sliding in and out, and that could also be happening, but it is basically what you'd expect from loading that up and seeing what's going to happen, so I'm going to say Yes. My Factor of Safety is 12, which is great. So even if my assumptions aren't perfect, I've got a lot of leeway, so I'm looking pretty good.
Click on the von Mises stress, you can see what's happening. You've got a stress riser here, where it's coming ut of that bearing, which makes a lot of sense. The same thing right there, same thing over here. But as you can see, we're getting a lot of good data out of this, and all it is is a basic rod, that we just sliced up and looked at how we're applying loads along that rod to get pretty detailed analysis of what's going on, all inside the free version of SimulationXpress. So there you have it, and hopefully this little tip can help you to design better products.
- Simulation workflows and options
- Xpress vs. Simulation vs. Sim pro
- Fixtures, loads, materials, and mesh
- Running a simulation
- Reviewing stress, displacement, and factor of safety
- Updating and iterating
- Producing reports
- Model preparation
- Simulating multiple parts
- Importing assemblies as parts