If an element of a specimen of brittle material is subjected to shear stress, the crack propagation if occurs, will be inclined to the sides of the element at

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UPPSC AE Civil 2022 Official Paper I (Held on 29 May 2022)
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  1. 60°
  2. 45°
  3. 30°
  4. 90°

Answer (Detailed Solution Below)

Option 2 : 45°
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Explanation:

Brittle material:

It is defined as the materials that do not have plastic deformation, their stress-strain curve has little or no deformation. If brittle material is subjected to shear stress crack occurs at an inclination of 45o to the side of the element.

Additional Information

  1. Brittle materials fracture rather than yield.
  2. Brittle fracture in tension is due to normal stress only.
  3. Brittle fracture in compression is due to a combination of normal stress and shear stress.
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