Where are your hand calculations? Where did you come up with a pressure load of 110897 Pa?  That sounds like air pressure. You don't apply that to a cantilever beam.  A more realistic pressure is 50 Pa.

I created a surface with the length and width of the beam and assigned the thickness.

Hand Calculation      = 0.485 m
ANSYS Deformation = 0.482 m (-0.6% error)

Hand Calculation = 10.3 MPa
ANSYS Stress     = 10.4 MPa  (1.5% error)

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