Specifies that the tangential stress components should be calculated on element surface - during Map3D BEM analysis.
When not checked, only normal and shear stresses are calculated. Tangential stresses are not calculated since they are not required for solution.
When checked, all six stress components (normal 
, shear 
and tangential 
) will be calculated.Tangential stress components are often desirable since they represent the extreme fibre stress, ie. the stresses tangential to a surface),
The maximum tangential stress is often compared to the material unconfined compressive strength in a similar manner to in-plane wall stress [ 3 σ1i - σ3i ].
Notes:
This function must be checked before conducting the Map3D BEM analysis
This option requires additional calculations and hence increases analysis time.