Shear Area and Unit Shear Stress
The Shear Area Ay and Az in principal directions are determined as follows:
with:
On the following picture the 'cut-off' area A' is illustrated for the Shear Area Az.
The Unit Shear stresses in the fibres are calculated as follows:
Unit stress Shear y in fibre i:
Unit stress Shear z in fibre i:
With Vy and Vz taken as unity and yi and zi the coordinates of fibre i in the principal axis system.
In case the width b at a given fibre position is zero the Unit Shear stress is taken as zero for that fibre.
For thin-walled (Centerline) sections, reference is made to the "1D FE Method for Thin-Walled Sections".
For multi-material (Composite) sections reference is made to the "2D FE Method for Thick-Walled Sections".