Maximum Principal Stress Theory is Used for

Answer: 2. Brittle materials

Maximum principal stress theory is used for brittle materials.

Solution:

Maximum principal stress theory is used for brittle materials. Rankine’s theory is another name for maximum principal stress theory. According to this theory, the permanent set occurs when the maximum principal stress equals the yield point stress as determined by a simple tensile test.

The maximum principal stress (σ₁) for the design criterion cannot be more than the material’s working stress ‘σ_y’.

• σ_1,2 ≤ σ_y  For no Failure
• σ_1,2 ≤ σ_/FOS  For design

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