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Which of the following statements about a principal plane is true ?

Which of the following statements about a principal plane is true ? Correct Answer No shear stress is present.

Concept:

  • The plane on which normal stress attains its maximum and minimum values are called principal planes.
  • The shear stress on the principal plane is zero.
  • The planes of maximum and minimum normal stresses are at an angle of 90° to each other.


Planes of maximum stress occur at 45° to the principal planes.

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