Issue 51

S. Merdaci et alii, Frattura ed Integrità Strutturale, 51 (2020) 199-214; DOI: 10.3221/IGF-ESIS.51.16

f(z) : Warping function (transverse shear function) f ’(z) : The first derivative of the warp function with respect to z Q ij

 : The upper surface.

: The stiffness coefficients

i, j : Natural numbers. [K] : Symmetrical matrix

x  , y xy  , yz

 , z  , yx 

 : Normal stresses

: Shear stress

   : Vector of generalized displacements

x  , y  : Deformation in the x, y and z direction

{F} : Vector of generalized efforts

xy  , yz 

, yx 

: Distortion deformation

w 

w 

u 

, v  ,

,

: Virtual field of displacement

w : Non-dimensional central deflection

b

s

w b : Flexural components w s : Shear components

 , xy

 , xz 

, yz 

x  , y

: Non-dimensional stresses

z : Coordinate Thickness

m, n : Mode numbers.

214