Thin shell for modelling a can
Thin shell for modelling a can
(OP)
Hello all,
I need to perform a finite element analsysis to determine the deformation of a can under a 2bar internal pressure.
The material of the can is TH520 (tin plate, i've got the strain-stress curves), and the thickness of the plate is 0.18mm - 0.19mm.
I have performed a non-linear analysis with Nastran, and I am obtaining non-satisfactory results, since the nodal displacements are far greater than expected and different from the experimental results. I think the reason is the finite rotations at the nodes, but I am not sure, since I never worked with these low-thickness values. I attach a picture of the mesh.
I have thought of trying Abaqus for this analysis but I don't want to commit the same mistakes, so, which elements would be suitable for this purpose? Any other advise?
Many thanks in advance
Víctor Roda
I need to perform a finite element analsysis to determine the deformation of a can under a 2bar internal pressure.
The material of the can is TH520 (tin plate, i've got the strain-stress curves), and the thickness of the plate is 0.18mm - 0.19mm.
I have performed a non-linear analysis with Nastran, and I am obtaining non-satisfactory results, since the nodal displacements are far greater than expected and different from the experimental results. I think the reason is the finite rotations at the nodes, but I am not sure, since I never worked with these low-thickness values. I attach a picture of the mesh.
I have thought of trying Abaqus for this analysis but I don't want to commit the same mistakes, so, which elements would be suitable for this purpose? Any other advise?
Many thanks in advance
Víctor Roda





RE: Thin shell for modelling a can
RE: Thin shell for modelling a can
thank you very much for your advice, I really appreciate it.
I though about using axisymmetric elements at first, but then the company which manufactures the cans asked me for a buckling-postbuckling analysis, so I decided to have a tridimensional mesh for this study (according to Abaqus explicit user's guide), and then use it for the internal pressure test.
But according to your explanation, I think that two different models will be necessary.
Again, thank you very much for your time.
Kind regards,
Victor Roda
RE: Thin shell for modelling a can
I have used an axisymmetric analysis as you suggested me and now the finite element analysis match the experimental results.
Thank you very much
V.