TAGGED: analytical, mesh, meshing, quadrilateralmeshing, stiffnessmatrix


April 6, 2024 at 5:29 pmTian Xiang ThongSubscriber
Hi,
I am trying to compare the result of simulation with analytical solution using 2D quadrilateral element.
The result I obtain from Ansys does not match with my calculation. The vertical displacement at the top right corner based on my calculation is 0.44626 mm.
I solve the matrices using this equation:
Can someone tell me what's wrong with my calculation? Or how Ansys solve the matices? I am able to get the exact same result if I use triangular element.
Thank you.

April 8, 2024 at 3:33 pmdloomanAnsys Employee
Perhaps the Ansys element is using "enhanced strain" which makes the element more flexible in bending.Â If so, try turning that off and see if the displacements match.

April 9, 2024 at 2:36 amTian Xiang ThongSubscriber
How can I do that?

April 9, 2024 at 2:39 pm

April 9, 2024 at 4:31 pm

April 10, 2024 at 2:49 pmdloomanAnsys Employee
Usually the larger deflection (less stiff model) is the more correct one.Â In such a short beam shear deformation would be significant.Â It would be interesting to compare solutions for a long cantilever beam.Â We have patch tests in the Verification Manual so it's unlikely the Ansys solution is wrong.

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