Hi, for some elements (like beam and truss elements) it is not possible to directly get the vonMises stress as their formulation is not based on 3D stress and strain but rather on a truss or a beam formulation. For these elements we are typically more interested in axial stress or bending stress. It is, however, possible to create user defined results to manipulate the results as I show in this video: ua-cam.com/video/LByOz8U1aLk/v-deo.html
Hi, do you mean these ones: ua-cam.com/users/GlasnevinPublishingvideos They are a bit out of date and I plan to update them and post them to this channel.
Hi, that was an error actually. Thanks for pointing it out. That is the reason that the results are slightly different from the results in the example given in the book. The left vertex should be constrained for all displacements but not rotation.
Hi, I am not sure what you mean here. The bicycle problem is 3D so you could use 3D solid elements instead of beam elements if you wanted but I am not sure how or why you would use 2D elements to accurately model this problem
Hi, it is not directly possible to get the safety factor with beam elements, however, you can get it by defining a "user defined result". If you highlight the "solution" in the model tree, you will see that "worksheet" becomes available in the top right hand corner of the main window. Click on this and select (for example) MAX_BENDING. Right click on this and select "Create user defined result" - this will create a new result item in the model tree. To change this into a safety factor, click on it and then change the expression (which should currently be BEAMMAX_BENDING) to "BEAMMAX_BENDING/300e6" if 300 MPa was your yield stress - this will give you your safety factor. Hope this helps!
what do you do if tou want to make a knee given the effective length of the knee (pipe)
I habe done this analysis can i use this as my mini project?
that was a very good video. However i cannot excess the von mises equivalent solution for this matter. Why? and how to get von mises solution?
Hi, for some elements (like beam and truss elements) it is not possible to directly get the vonMises stress as their formulation is not based on 3D stress and strain but rather on a truss or a beam formulation. For these elements we are typically more interested in axial stress or bending stress. It is, however, possible to create user defined results to manipulate the results as I show in this video: ua-cam.com/video/LByOz8U1aLk/v-deo.html
Sir why did you remove your videos of ANSYS APDL explaining practical stress analysis with finite elements...where can I find those videos?
Hi, do you mean these ones: ua-cam.com/users/GlasnevinPublishingvideos
They are a bit out of date and I plan to update them and post them to this channel.
@@LearnFiniteElementAnalysis yes those were the ones....thank you 😊😊
thanks man helped alot.
it was a good video. thanks
Glad you liked it!
Why did you fixed the rotation too on the left vertex??
Hi, that was an error actually. Thanks for pointing it out. That is the reason that the results are slightly different from the results in the example given in the book. The left vertex should be constrained for all displacements but not rotation.
So how do you correct this?
What should I do if I want to mesh the cross section as 2D mesh instead of 1D mesh?
Hi, I am not sure what you mean here. The bicycle problem is 3D so you could use 3D solid elements instead of beam elements if you wanted but I am not sure how or why you would use 2D elements to accurately model this problem
thanks
is therea way I can get the safety factor ?
Hi, it is not directly possible to get the safety factor with beam elements, however, you can get it by defining a "user defined result". If you highlight the "solution" in the model tree, you will see that "worksheet" becomes available in the top right hand corner of the main window. Click on this and select (for example) MAX_BENDING. Right click on this and select "Create user defined result" - this will create a new result item in the model tree. To change this into a safety factor, click on it and then change the expression (which should currently be BEAMMAX_BENDING) to "BEAMMAX_BENDING/300e6" if 300 MPa was your yield stress - this will give you your safety factor. Hope this helps!
your god of fem thanks!!!
gettin a question mark on model in geometry...parts