SAINT VENANT’S THEORY
MAXIMUM PRINCIPLE STRAIN THEORY (SAINT VENANT’S THEORY)
As per the maximum principle
strain theory, the elastic failure occurs when the greatest principle (or
normal) strain reaches the elastic limit point (or strain yield point) as
determined from a simple tensile test. This theory is focused towards strain
occurring during failure.
According to this theory, the
elastic failure will occur, when
(1/E)
[σ1 – ν(σ2 + σ3)] = σe/E
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