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 2 of 4.
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.
Anuj said:
6 years ago
Correct @Usha.
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.
Kokki kumar said:
4 years ago
@Random Iq
Nice and correct explanation. Thanks.
Nice and correct explanation. Thanks.
N STAR said:
3 years ago
Thanks for the description @Random.
Jarvis said:
1 year ago
MOR is also called as strength of that member.
In case the cantilever beam is subject to point load at its free end;
Ma=WL when the length is L.
Mb=2WL when the length is double 2L.
Mb=2Ma hence elastic strength of B is 2 the elastic strength of A.
In case the cantilever beam is subject to point load at its free end;
Ma=WL when the length is L.
Mb=2WL when the length is double 2L.
Mb=2Ma hence elastic strength of B is 2 the elastic strength of A.
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