Simulate: issue with measure on component interface for measuring shear

[SB_10895015]

I am using Creo Simulate Release 7.0 and Datecode7.0.3.0

I'm having an issue adding a measure. I have a pair of nested cones that represent the front of an aerodynamic body. There is a pressure applied to the outside of the outer cone. There is a bonded interface between the two cones. So, this is like a cone with a thin coating of a different material.

I want to know if the coating will delaminate. I want to put a measure on a line along the inner surface of the cone so I can measure shear. However, I can't figure out how to get shear in a specific axis (not one of the primary axes), and whenever I add a measure to a line the study will no longer run.

[Amol_Lungare]

Hi @SB_10895015 

Would it be possible for you to share the file with us?

Regards,

Amol Lungare

[SB_10895015]

Potentially. I will need to get permission. I will check tomorrow and see.

-S

[SB_10895015]

Please find, attached, the file. This includes the Simulate components.

Note: the measure "interface_shear"

Along that line, I want to generate a plot of shear in-plane with the surface of the inner cone.

Since the original post, I managed to get the model to run with this measure in place, by changing the mesh rules.

I still don't know how to get the shear in-plane.

[Amol_Lungare · Accepted solution]

Hi @SB_10895015 ,

As already suggested through case 17616971. you might consider creating a new Creo Simulate coordinate system with axes along the desired direction/curve, and use an autogem control for hard curve.  A measure should then work on the hard curve. This could also be helpful in reviewing fringe plots with a capping surface applied that would allow you to perform dynamic query operations, and also manipulate legend values to query the results in depth.

Maybe the above could be a simple solution along with Maximum Shear quantity in Fringe plot (capping surface). You could also adjust results to show only one component, a surface of interest, etc. The main challenge is there is no conical coordinate system.

About Friction and contact, I do not expect you would know coefficient of friction of the bond since the epoxy in real like would encounter relative motion from bond/material failure rather than sliding/slippage.  Maybe the material data sheet might have this information, but it’s not something I would expect is typical.  If it is available, you could utilize the slippage measures as previously mentioned. Again, friction needs to be a known value, not something that can be measured.

Ideally, a solid model with known structural properties of the bonding agent applied would be a solid route.  While Creo Simulate generally handles linear materials (linear portion of stress strain curve of Steel for example), it does have elastoplastic and hyper-elastic non-linear material models as I shared with https://support.ptc.com/cs/cs_27/howto/mst12563/mst12563.htm

Lastly, perhaps a lesser known/used model type in Simulate might interest you, which is 2D axisymmetric.  These articles may be helpful as well: https://www.ptc.com/en/support/article/CS104684, https://www.ptc.com/en/support/article/CS52107, & https://www.ptc.com/en/support/article/CS202108

That idealized analysis type will not only run quicker, but will be even simpler if WCS is oriented as desired along bond interface, however, you can create a CSYS in Simulate along the bond interface to use for measures & other results.

Regards.

Amol Lungare