I am trying to model the structural response of a 6-ply birch plywood panel in pure bending. If the simulation shows good correlation to physical testing, I will move onto stiffness analysis of an aircraft fuselage made of the same panels by using adhesive or other means of fastening. The fuselage is of a SAE Aero regular-class aircraft and the aircraft is student designed.
My questions are:
1. What kind of geometry should I use ? 3D Solid Body, 2D Solid Body or 3D Surface Body?
2. The material Plywood is modeled as a homogeneous, isotropic material. In this case, how will Ansys account for the orthotropic behavior of the plywood. I am aware of plywoods which are very close to isotropic behavior so this idealization is valid I guess.
3. Is there an completely different alternative to this exercise? ACP for example ?
4. The results of the physical testing are sensitive to loading geometry so I should model the test fixtures and loading tool, right ?
We do not have material data for the 6-ply birch plywood and the people we source it from cannot be trusted, in all honesty! That is why we are testing it ourselves so we can obtain the flexural modulus, stress-strain behavior, and failure limits in bending. We do have some excellent papers on plywood and we will be comparing our results to the values in those papers.
I hope I did not create a repetitive post here. Please let me know if additional information is needed and if you have any questions.