Hello Everyone,
This is a just a general question to the experts out there. In my experience running simulations using bonded contact with the penalty method in Ansys Workbench I have a lot of difficulty obtaining convergence if the forces at the bonded connection are tangential as opposed to...
That is a good idea. I will give it a try in a bit and let you know how it works out.
Thanks,
Steve
Stephen Seymour, PE
Seymour Engineering & Consulting Group
www.seymourecg.com
Hello All,
Does anyone know if it is possible or if there is a workaround to model a non-linear spring in mechanism? It appears the spring rate can only be linear for a mechanism spring.
Not sure if some gurus out there have used custom load functions to accomplish the same effect.
Thanks...
Hello All,
I have an assembly that was provided to me that has some parts in it that have external shrinkwrap features. The problem is when trying to check into PDMLink the externally reference parts that pertain to the external shrinkwrap features show up as ghost objects (aka "incomplete CAD...
ProM can do a classic shock pulse within the time domain using the Dynamic Time analysis. The problem OP was having was the ProM would not provide von Mises stress results at the frequencies he explicity defined in the anlaysis tab.
I read a PTC KB article that stated there were some errors in...
The best approach for you might be to create some measures ahead of time at the critical locations. You can create some datum points in the simulation model, then create the measures on them and re-run.
Mechanica can show the undeformed model (not sure about WF2), yet you cannot make...
Base excitation is the typical approach for me. Mechanica's help files and PTC's KB will shead a little more light on this, but selecting either force funcitons or base excitation will change the reference point from where displacements are measured.
Base excitation will apply the forced...
Flask,
(1) That is correct. For the particular application and simulation the desire was to have the force vibrate in a specific direction that did not lie on any of the WCS axes. If you wanted to vibrate along any one of the axes just do as you stated by applying a 1 in the desired direction...
Flask,
For last year's PTC User conference I created a presentation that covers exactly what you are trying to do. You can find the presentation on my site at the following link:
http://www.seymourecg.com/downloads/ptcuser2010/ptcuser2010_design_eng_with_promech.zip
Or
Got to my website and...
If possible can you post the model or a picture of geometry? Also, are you using any mid-surface compression to create shell elements. This process can remove geometry faces that might be referenced by other mechanica entities.
Steve
Stephen Seymour, PE
Seymour Engineering & Consulting Group...
Hello All,
I have challenge on my hands that has had me puzzled for the last couple of hours. I am trying to simulate a wire cable in mechanism that goes around a pulley. I don't have to include any slack (even though in reality there will be).
A couple of thoughts I have had are to model a...
Physical testing or atlas of stress strain curves.
Remember, to convert the engineering stress strain data to true stress vs plastic strain data.
Steve
Stephen Seymour, PE
Seymour Engineering & Consulting Group
www.seymourecg.com
It could be done with a prestressed static, however I am running a large displacment analysis which is non-linear, thus not eligible for the prestressed static option.
Steve
Stephen Seymour, PE
Seymour Engineering & Consulting Group
www.seymourecg.com
Hello All,
I have question reqarding idealzied springs that just came to mind today. Does anyone know if it is possible to apply preload to an idealized spring? I have searched around a little and don't seem to find where this can be done. I have a situation that requires me to apply preload...
To determine the stress at specific locations you can employ either one of the following methods:
1) Create a measure at the specfic location using a datum point as a reference prior to starting the analysis.
2) Use the dynamic query option within the results viewer.
Steve
Stephen Seymour...
I vote that heating the bat would be bad for long distance hitting.
Reason being, heating the material will lower the modulus of elasticity and there by reduce the overal structural stiffness of the bat. Lower bat stiffness would imply lower impact forces.
Interesting question though.
More...
If the surfaces of the geometry are not touching then Mechanica considers them to be free from one another. It sounds to me the surfaces are not touching and do not have contact surfaces established between them.
STeve
Stephen Seymour, PE
Seymour Engineering & Consulting Group
www.seymourecg.com
Michael,
The question pertains to conrolling the width of the first column that contains the feature tree.
Steve
Stephen Seymour, PE
Seymour Engineering & Consulting Group
www.seymourecg.com
