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Question 7.2: Calculate the maximum stress* induced in a cast iron pipe of...

Calculate the maximum stress* induced in a cast iron pipe of external diameter 40 mm, of internal diameter 20 mm and of length 4 metre when the pipe is supported at its ends and carries a point load of 80 N at its centre.
*The bending stress will be maximum at the section where B.M. is maximum. This is because
\frac{M}{I}=\frac{\sigma}{y} \text { or } \quad \sigma=\frac{M}{I} \times y \text {. }

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