Reply To: analytical deflection of fixed beam not matching ansys results

[mohan.urs]

Hey,

The difference in the values is due to the fact that shear deformation is not included in your analytical calculation. The classic beam theory formulas do not include the deformations due to shear. If the beam is not long enough for the section, the shear deformation, which is not concidered in your calculation, is not negligible. As the result, the deformation is larger than your calculation.

Check out this course which explains why there is a difference between them and also validates it.
https://innovationspace.ansys.com/courses/courses/a-non-slender-cantilever-beam-under-point-tip-loading/

You can try using classic beam elements instead of solid elements (current case) if you want to match the values. And also since you are using solid elements Timoshenko beam thoery is not applicable for them. For more info on beam elements which use Timeshenko theory check out theses links.
5.3. Beam and Link (Truss) Elements
https://ansyshelp.ansys.com/public////Views/Secured/corp/v242/en/ans_elem/Hlp_E_BEAM188.html
https://ansyshelp.ansys.com/public////Views/Secured/corp/v242/en/ans_elem/Hlp_E_BEAM189.html

Regards,
Mohan Urs