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.
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.
Kailash kumar said:
5 years ago
Right, Thanks @Usha.
Harsha said:
5 years ago
B) 1/2 is correct.
Vinay BEL said:
5 years ago
[B]. One-half is correct.
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.
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.
Ravi said:
6 years ago
Option A is correct.
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.
Anuj said:
6 years ago
Correct @Usha.
Usha said:
6 years ago
σ1= M/z1=w*l/z,
σ2= M/z2=w*(2*l,)
Z1=z2 as b,d are same.
So, σ1/σ2 = 1/2.
σ2= M/z2=w*(2*l,)
Z1=z2 as b,d are same.
So, σ1/σ2 = 1/2.
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