Mechanical Engineering - Strength of Materials - Discussion

Discussion Forum : Strength of Materials - Section 8 (Q.No. 36)
36.
The rectangular beam 'A ' has length l, width b and depth d. Another beam 'B' has the same width and depth but length is double that of 'A'. The elastic strength of beam 'B' will be __________ as compared to beam A.
same
one-half
one-fourth
one-eighth
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
38 comments Page 4 of 4.

RAJAT SAHU said:   8 years ago
Same is the right answer.

Aneesh kushwaha said:   8 years ago
I think it will be same. Agree @Apcivilian.

Apcivilian said:   9 years ago
The right answer is A because elastic strength Z. Doesn't depend on Length.

z = bd2/6.

Same is answer.

Sanjib jana said:   9 years ago
4 times as section modulus --> bd^2/6.

Abhishek said:   10 years ago
If length, width are remains same and depth is double that of A then what's the elastic strength of B?

Expert's Advice said:   1 decade ago
Strain=PL/AE use this.

Anand said:   1 decade ago
Strength of beam can be calculated by formula R = 1.5PL/bh^2.

Hence right answer.

Narenthiran said:   1 decade ago
Can anyone explain this?
(1)


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