plane stress

ppl in a plane stress problem, it is assumed that perpendicular to the
plane shear stress and normal stress is zero.
but due to the strain in directions parallel to the plane , there must
be a strain in the direction perpendicular to the plane by poisson's
effect, which will cause a normal stress.
so is the assumption made as normal stresses @ surface is zero ( as
surface is free of loads in one direction and hence there is no
deformations possible in the elements on surface) and by omitting the
stress in the interior
Regards
WOT
Reply to
WOT
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