The stress due to suddenly applied load is______of the gradually applied load.
a) 3 times
b) 2 times
c) either a or b
d) None of the above
a) 3 times
b) 2 times
c) either a or b
d) None of the above
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Answer:
b.2 times
Explanation:
Work done is equal to the strain energy stored.
(F δL) / 2 = (σ2 / 2E) AL
Therefore, σ = (F/A) ----------- (1)
- Suddenly applied load is given as σ = (2F/A), here work done = (F δL)
(F δL) = (σ2 / 2E) AL
Therefore, σ = (2F/A) ------------- (2)
From (1) and (2), it can be concluded that
Hence, suddenly applied load is twice the gradually applied load.