General Notes on Plane Stress and Plane Strain

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(1)            In plane stress

(2)            In plane strain

(3)            If we replace in the plane stress equation

it becomes a plane strain equation.

(4)            We can define a case where in thin plates,

but has a constant value say  and . The plane stress equations are all valid, (except ). Such a state is called '' Generalized Plane Stress''.

Similarly, in the thick cylinder case, , it is called ''Generalized Plane Strain''.

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