transverse shear thickness

[mathlete7]

Does anyone know of a formal definition for "shear thickness". For instance, in the Nastran QRG, for shell elements you can define a transverse shear thickness ratio (ts/t) - for which the default is 0.8333. Where does 0.8333 come from? Anyone know? Is 0.8333 taken to be thickness that, when uniformly sheared, will yield an equivalent max shear stress?

 

[SWComposites]

0.8333 = 5/6 which is 1/F where F is the transverse shear stress shape factor for a homogeneous rectangular section. See Roark, section 7.10 (5th Ed) Beams of Relatively Great Depth

 

[mathlete7]

Found it. Thanks SWComposites!