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And the author of a very prescient paper on the adverse effects of "outsourcing".

if you have modelled it with the typical single node connection at the fastener, connected with spring/cbush/bar element, which ignores contact surface and clampup effects, then the moment is likely incorrect (way too high).

I am not aware of any such standard test. You will likely need to design a test setup. What is the structural configuration that is introducing a large moment at a single insert? Sounds like a redesign is needed.

https://www.apexgasgenerators.com/post/the-use-on-nitrogen-in-autoclave-applications#:~:text=During%20this%20curing%20process%20the,an%20inexpensive%20and%20inert%20option.

Going off FEMAP memory from long ago, I think you can get shell element surface strains. But ply strain and laminate strain is the same (unlike stresses), since strain is linear thru the thickness. The surface ply strains will be the largest values, for the directions of that those plies...

ok. request strain output.

couple of links from Google search for "water soluble mandrels" https://acmtucson.com/products/ https://northerncomposites.com/wash-out-tooling-materials/ https://soltecaz.com/products/ probably other options

and why is a question about welding a metal pipe in a composite materials forum? move to the Welding forum.

fullsole???

Is the part an acoustic panel with facesheet perforations? If so, that is a direct moisture path into the core and adhesive, raising the risk of degradation. And if is not PAA core then the is risk of corrosion effects.

Is the issue caused by actual degradation of adhesive due to heat during repair cure? > possible. depends on the original adhesive cure temp (you state 250F cure). also any in-service thermal exposures. how old/#cycles is the part being repaired? Probably not the case if an approved SRM...

I suspect so, but get price info from the suppliers.

handling supported adhesive is much easier. bondline thickness control is somewhat better with supported adhesive, but depends on the joint config and process what are you using the adhesive for? what is the joint configuration? what is the tooling and cure process? knit vs random carrier...

yes, what is this for? what is it used on? in what environment? if you need to ask the question, the answer is probably "yes".

So if the mold is on the outside of the part, why not split the mold into two halves that you disconnect after cure. Seems like it would be much easier to demold that.

You could also try heating the part and see if it pops off the mold. Wait, is the mold inside or outside of the cone (part)?

Ok, sounds like mold release application is not the issue. Perhaps the resin is shrinking during cure locking it to the mold? Have you made this cone part on this tool successfully before? Is the top of the cone open so maybe you can rig up a tool to hold the part and press out the mold from...

Do you mean PVA release agent? Are you reapplying wax and PVA before each layup / cure? Are you sure you cleaned off any residual resin before reapplying release? Can you pop up a corner of the part with a wedge?

Are you (properly) applying mold release to the molds? What is the composite material? Prepreg or wet layup? Cure temperature?

Yes, ignore the foam, analyze as a simple round tube. For axial stiffness and bending stiffness calcs, use Ex moduli (assuming x is in the length direction of the tube). For torsional stiffness, use Gxy in the calcs.