Join Thom Tremblay for an in-depth discussion in this video Creating a static stress study, part of Fusion 360: Designing for Metal.
- The basic version of Fusion 360 has the ability to do static stress analysis and a couple of more simulation types. The ultimate version of Fusion 360 has many advanced types of simulation. In this video we will do a basic static stress study But the process for even the advanced studies is very similar. To do simulation inside Fusion 360 we'll use the workspace pull down to switch to simulation. As soon as you switch to simulation you'll be prompted with a new study dialogue where you'll select the type of simulation that you want to perform.
I'm currently using Fusion 360 Ultimate so that there are eight options available. I'll make sure that static stress is selected and click okay. When I do this I'll get a getting started window that will present information on the different types of analysis that can be done as well as links to video to show me the process, and what the results will be. There are also more in depth tutorials available for each of the analysis types.
The tool bar will change as well as the browser. This specialized version of the browser includes not only the structure of the design but also includes the loads, contacts, mesh information and results, to make it easy to locate the current values and make modifications. I'll begin first starting left to right taking a look at the material. I'll take a look at the current study materials and it shows me that the current model material is aluminum.
I can keep the study material the same as the model or I can select from a large material library, a different grade of aluminum or a different type of metal. I can also set whether my safety factor will be calculated based of yield or ultimate tensle strength. For this study I'll leave the material as aluminum and I'll use yield strength as the safety factor. Next we'll move on to constraints. I'll choose the structural constraints tool.
First I'll start with fixed constraint. I'll set the pinned location as a fixed constraint. I can release flexibility along one or more of the axis but for this model I'll leave them all fixed. I'll restart the structural constraint tool and switch to the pin constraint. I want to see what happens when load is applied to this model and the surface is wrapped around the pipe gets stretched, so I'll make this a pin constraint allowing it to rotate radially but not to rotate axially.
This will help stabilize it in the model. And also better represent what the design will be doing in the real world. I'll click okay to apply this constraint. Next we'll move to loads. Gravity really isn't a consideration for this design so I'll simply go to structural loads and rather than applying a simple force or pressure, what I'd like to apply is a bearing load. I want to apply a bearing load that will represent the pin in this hole being pulled, in the correct direction which I'll rotate to make sure it's aligned properly and because I'm not as comfortable with using newtons as a unit of measure, I'll change the units to pounds force and set the load to 200.
I'll click okay. And now the basics of my model are ready. I can verify this under the solve tab by selecting pre-check and it will let me know if it has all the constraints and loads that it needs to understand or not if it's ready. With that in mind I'll use the solve tool. This is another area where we can use the local machine as the processor or if you have a modest machine or limited time you can do the solve on the cloud and the simulation results will be connected to your Fusion 360 design file and available next time you access it.
I'll go ahead and solve this locally and start the process. With the solution found I get results, details dialogue showing me the minimum safety factor of 3.88 which is well above what I need. I'll close this. I can always reopen it by selecting the checkbox near the top of the results bar. If I want to zoom in on where the minimum safety factor is I can simply pull the graph down and the results will be restricted to that area.
The indicators also show where the range of safety factor is. I can change the results by switching from safety factor to stress, and seeing the map displayed across the model, you can also isolate the stresses across principles, and normals and sheers. I'll set the results to displacement. This is a great example of showing how the results are displayed.
Looking at this model here's the original face and it looks like this top surface is being pulled well above it. However, it's important to look at the graph. It is moving but it's being displaced less than 30 thousands of a millimeter. So a very, very small amount. You can change how this is displayed under the results and change the deformation scale to actual. And if you zoom in close enough you can see just what that displacement really is.
And there's no reason for panic. Another thing we can do under results is get an animation of the results. So see what is happening to the model as it deforms, Or as the stress is applied to it. We can make this 2a.
We can also record this and save it as a file to be shared with others. The analysis in this video would have taken many hours just a hand full of years ago. And the improvements and performance and types of analysis available will continue to expand and offer more options to Fusion 360 users.
- Setting up parameters
- Joining components
- Animating and rendering the design
- Testing alternative materials
- Creating the setup
- Publishing and posting the design