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.
Discussion:
38 comments Page 3 of 4.
Bagada bhavesh said:
6 years ago
One half,(b=a/2).
Pl/ae=2pl/ae.
A=2B.
B=A/2.
Pl/ae=2pl/ae.
A=2B.
B=A/2.
Ravi said:
6 years ago
Option A is correct.
Mandan said:
5 years ago
Strength doesn't depend on the length of the beam.
The strength of beam purely depends on its section modulus (Z).
So the correct answer is A.
The strength of beam purely depends on its section modulus (Z).
So the correct answer is A.
Sanjib said:
5 years ago
Same is the answer,
Elastic strength means section modulus and it is not dependent on the length.
As you guys find other questions related to elastic strength find out the section modulus.
So here also be the same.
So the answer is A. Same.
Elastic strength means section modulus and it is not dependent on the length.
As you guys find other questions related to elastic strength find out the section modulus.
So here also be the same.
So the answer is A. Same.
Vinay BEL said:
5 years ago
[B]. One-half is correct.
Harsha said:
5 years ago
B) 1/2 is correct.
Kailash kumar said:
5 years ago
Right, Thanks @Usha.
Shubham said:
5 years ago
@Usha.
Elastic strength of beam with double Length will be double not half.
Elastic strength of beam with double Length will be double not half.
Ali said:
5 years ago
σ = E * Strain;
We know that.
Strain=Change in length/Original length.
σ= E* Change in length/Original length.
When Original will be doubled elastic strength will be half.
We know that.
Strain=Change in length/Original length.
σ= E* Change in length/Original length.
When Original will be doubled elastic strength will be half.
Soumya said:
5 years ago
@Ali.
If length is doubled then for the same load the change in length will also be doubled since delta l=pl/ae. Now explain how elastic strength changes.
If length is doubled then for the same load the change in length will also be doubled since delta l=pl/ae. Now explain how elastic strength changes.
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