I have been working on 3D FEM in Matlab. Done different verifications tests and have good match with Abaqus and analytical results for some cases, but for a 1/8 sphere, I am facing this issue.
The interior of 1/8 sphere has been pressurized. But, the displacement at the 3 edges are for some reason small. This cause Bulging at the Interior.
I have checked everything from Boundary condition to Formulation, but couldn't find any issue. Do you have experience with this? Can you please suggest why this is happening?
I have attached the result for Matlab and Abaqus here.
Thanks.