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21 December, 21:28

Which of the following is correct regarding the principal stresses and maximum in-plane shear stresses? a. Principal stresses cannot be negative. b. The shear stress over principal stress planes is always zero. c. A principal stress plane can be reached by rotating the maximum in-plane shear stress plane 90° in the clockwise direction. d. The maximum in-plane shear stress is always smaller than principal stresses.

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  1. 21 December, 22:27
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    option B.

    Explanation:

    The correct answer is option B.

    Principal stress is the maximum normal stress a body can have. In principal stress, there is purely normal stress. On principal plane shear stress is zero.

    In-plane shear stress are the shear stress which is acting on the plane.

    The statement which is correct regarding principle plane and shear stress is that The shear stress over principal stress planes is always zero.
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