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Higher Study | Strength of Materials | Principal Stress or Strain

At the principal planes
According to Mohr's circle, the shear stress is maximum when:
A solid rod of circular cross-section made of brittle material, when subjected to torsion, fails along a plane at 45° to the axis of the rod. Consider the following statements as pertaining there to: 1. Distortion energy is maximum on this 45° plane. 2. Shear stress is maximum on this 45° plane. 3. Normal stress is maximum on this 45° plane. Which of the above is/are correct? 
Mohr's circle is a graphical representation of plane stress problems showing
consider a simply supported beam with a uniformly distributed load having a neutral axis (NA) as shown. For points P (on the neutral axis) and Q (at the bottom of the beam) the state of stress is best represented by which of the following pairs?
The state of stress represented by Mohr’s circle shown in the figure is
Which of the following is/are correct with regards to Mohr’s circle? I) It is used to denote shear stress distribution. II) Mohr’s circle can be drawn for a fluid at rest.
Which of the following statements about a principal plane is true ?
On a stressed body there are points on which shear stress is zero. These planes are known as:
Which of the following figures may represent Mohr’s circle?
The plane which pass through the point in such a manner that the resultant stress across them is totally a normal stress is called:
Which of the following stresses is measured on inclined surface in Mohr’s Circle Method?
For a square metal plate, if σx = σy and Txy = 0, then which of the following options is true?
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