Mechanical Engineering - Strength of Materials - Discussion

Discussion Forum : Strength of Materials - Section 1 (Q.No. 31)
31.
The bending stress in a beam is __________ section modulus.
directly proportional to
inversely proportional to
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
12 comments Page 2 of 2.

Prasad said:   1 decade ago
Stress = M*Y/I.

So section modulus is I/Y.

Hence inversely proportional.

Samantha said:   1 decade ago
When a load applied on the beam then bend the beam downward direction.

M/I=F/Y=J/R.

From that equation we said that bending stress indirectly proportion to the section modulus.


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