OOF2: The Manual
| Plane_Stress | ||
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6.4.4. Equations |  |
Name
Plane_Stress
Description
The Plane Stress Equation is
![\[ \sigma_{iz} = 0 \]](equations/6.4.4-eq-4.gif)
where 
is the Stress. It has three components, for
.
Activating the Plane Stress equation is one way to reduce a three
dimensional problem to two
dimensions. A system in plane stress can have out-of-plane
strains but no out-of-plane forces, so it is equivalent to a thin
free standing membrane in the x-y plane. The three components of
the plane stress equation add three constraints to each Node of
the Mesh, corresponding to the three z-derivatives,
Displacement_z, of the Displacement Field which have to be solved for.
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| Force_Balance |  |
Coulomb_Eqn |