SSC JE Mechanical Engineering 2017 Set 1 Paper

Question : 185 of 200

Marks: +1, -0

From the hypothesis given by rankine, the criteria for failure of brittle material is_____.

Maximum principal stress
Maximum strain energy
Maximum shear stress
Maximum shear strain energy

Solution:

The maximum stress criterion, also known as the normal stress, Coulomb, or Rankine criterion, is often used to predict the failure of brittle materials.
The maximum stress criterion states that failure occurs when the maximum (normal) principal stress reaches either the uniaxial tension strength t, or the uniaxial compression strength σc,

-σ_c < \{σ_1,σ_2\} < σ_t

Where

σ_1

and

σ_2

are the principal stresses for 2D stress.

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