Question Statement:
Which of the following statement(s) is/are true about the state of a body in plane strain
condition?
P: All the points in the body undergo displacements in one plane only, for example the x -y
plane, leading to 𝜀zz = 𝛾xz = 𝛾yz = 0.
Q: All the components of stress perpendicular to the plane of deformation, for example the
x-y plane, of the body are equal to zero, i.e. 𝜎zz = 𝜏xz = 𝜏yz = 0.
R: Except the normal component, all the other components of stress perpendicular to the
plane of deformation of the body, for example the x -y plane, are equal to zero, i.e. 𝜎zz ≠ 0,
𝜏xz = 𝜏yz = 0.
(A) P only (B) Q only (C) P and Q (D) P and R