Statically Indeterminate Two Material Problem
A hollow rectangular steel section is filled with concrete as shown. The section supports a load of F kN. Find the compressive stress in the concrete and in the steel, and the deflection in the section due to the load
(Warning: no error checking is performed on inputs; make sure your dimensions work!)
Enter values:

F kN
a mm
t mm
L mm
Esteel GPa
Econcrete GPa