Shear modulus computed

[xflow-ben]

OWENSFEA.jl/src/timoshenko.jl

Line 324 in b749b61

GA = EA/2.6*5/6

Shear modulus should be at a minimum compute from E and Poisson's ratio
Though it would be better to pass in G (like E) as a parameter, for example computed from a composite beam stack up