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Totally understand. Thank you very much for your detailed explanation. So an important thing is that the position tolerance of the tertiary datum feature relative to the primary and secondary datum feature should be defined.

Got it. Many thanks.

Thanks for the example. It is also what I want. I'll study it.

Belanger, Really appreciate your detailed explanation and great advice. I have a question about the fixture you mentioned. The fixture (datum feature simulator) will be like the yellow part shown in the figure, and 'W' (width of of Datum simulator C) is adjustable so that it aligns with the hole...

@Greenimi @Powerhound Thanks for your response. Yes, it would be VERY helpful if there are some geometric tolerance between A, B and C are shown. Sorry for confusing. What I want to say is the determination of the actual DRF under the two DRF (ABC/ACB) annotations for the drawings on the left...

Hello, I have a question about the DRF. How to define it for the actual part? Is the understanding of the two DRFs on the left side of the figure below correct? My doubts are mainly about the origin and direction of the coordinate system. Thank you.

Thanks for your recommended video, Jerry. The video shows how to import materials to the default material library. I'm sorry I didn't make it clear. What I want is as following: 1. Do flow simulation (Moldex or Moldflow) for the plastic part injection molding and get a result with residual...

Hello All, I'd like to do some mechanical CAE analysis with NX Simecneter. It is said that Simcenter can import injection results which including residual stress, glass fiber orientation, and material characteristics, etc But I don't know how to do it. Can someone share with me some guidance...

Thanks for your sharing, 3DDave! Really appreciate!

Hi All, I'm designing a torsion spring. I got an excel calculation tool from the internet. Does anyone know which book the following pictures are from? I want to get more information about it. Thanks

Thanks, JBlack68 It works only in pre-processing. I can't find this option in post-processing when I check the result.

Many thanks, Thomas. Currently, I'm using Simcenter. And I'm going to study Femap.

Thanks, Thomas I'll try to do that with Femap.

Hi Thomas, Sorry for the confusion. I mean to display a 2D shell mesh like a 3D body with its actual thickness. Is it doable?

Thanks 3DDave, Thanks Belanger. Your statement and examples help me a lot!

I found a rule about flatness in an assembly. https://www.eng-tips.com/viewthread.cfm?qid=391228 Per ASME: Flatness comes into play in with the "To or Thru Rule". 1) If the stack goes to a surface, the form of the surface must be accounted for in the stack. 2) If the stack goes thru a surface...

@3DDave, Thanks for your interest. Here is my stack up. The flatness of the mating surface on part1 should not be taken into account because it does not affect the size 'a'. For the worst case, the flatness of the mating surface on part2 should be ±0.1mm. Then tolerance of this gap will be...

Hi All, Can someone tell me how to display the thickness of a 2D shell mesh in NX Nastran post-processing? Any help would be appreciated. Thanks. Frank

Hi All, I'm confused about when flatness should be taken into account in tolerance analysis. Here is an example. I will be grateful for any help. Frank