I made 3 static studies on a ladder shaped part. One with beam elements, one with surfaces and one with solids.
The surface and solid version gives similar displacement results.
The one with beam elements gives a larger deformation.
The "ladder" is made with VKR tubes 50x30x3,2 mm (steel 210Gpa)
Length 5000 mm
Width 500 mm
2 simple fixtures ("fixed" and "on flat surface" and 1 load of 750N
Bonded contact between the parts.
Done in SW2012 SP2.0
The resulting deflection (UY):
Beam: -106 mm
Surface: - 79 mm
Solid: -76 mm
Pictures on beam and solid versions are attached.
What did I do wrong with the beams setup?