Truss Analysis - FEA using ANSYS - Lesson 3

[@chiennguyenngochoang2300]

Thanks for this video sir , very helpful and delightful explanation

[@StructuresProfH]

Most welcome!

[@Deternanna]

This video has been very helpful for my master thesis. So thank you. I am though curious about, you mention there is some strange behavior of the trusses and beams if you pick the analysis type to be 2D, and therefore keep it as 3D. What are these strange behaviors? And do you know why they occur? Cheers from Denmark.

[@asparagus4481]

Hi professor, how do i find convergence on trusses elements? It states that it does not support line bodies...

[@mehwishkhan5139]

Hello Sir, how can we find the stresses when we carry out a simulation using link/truss elements? The Stress tool is unavailable and the beam tool to find direct stress also would not work in the solution of this analysis.

[@GranHerrmanno]

Hi, I want to create a system that only consists of beams. How can I implement several joints between the beams? When I want to click on "coupling (CP)" in the workbench but this field is grey and not possible to use the option? Maybe you can help me - thanks!

[@StructuresProfH]

I'm glad you found the follow-up video for beams and frames - that should cover this. Happy modeling!

[@GranHerrmanno]

@@StructuresProfH Thank you for your videos! One last question: do you know why the CP command isn't available?

[@StructuresProfH]

Not sure I have enough information to diagnose that. If you'd like to provide more details, check out the About page on my channel for how to contact me.

[@lovesandwich8783]

Hi professor I have a question. If I need to optimize the truss in terms of its weight by changing the dimensions so that each member is close to the yield point, would that be a possible thing to do on ansys? And what procedure would you recommend?

[@StructuresProfH]

It should be possible, but it may not be easy. The "Design Exploration" tools in the Workbench can be used to optimize a set of parameters that satisfy some conditions. You can define what are design parameters by checking the little check mark box next to just about every value in ANSYS; it will change to a "P" if it's a design parameter. Direct Optimization is obviously the most direct method, but may take a lot of time and iterations to come to a solution. In the Workbench, you link this optimization object to the parameters of a Static Structural analysis of your truss. You will also need to create output parameters like mass (mass is hidden within the Geometry object) and maximum stress (in a defined stress output). Then in that optimization object, you can define the objective and the constraints. The problem is that you will likely have many parameters if each individual truss element has its own parameter for cross-sectional area. You may need to be judicious in how you define them (maybe some set of elements all have the same area for constructability reasons). You may have a very long wait as ANSYS solves your problem many times. If you are interested, I have some basic optimization examples from when I teach FEA. Check out the About tab on my Channel page for contact info.

[@AirCrash1]

Everyone of your videos you waffle on for minutes about measurement conversion. Nobody cares about your stoneage measurement system, get on with explaining what the video is titled as.