Civil Engineering - Strength of Materials - Discussion
Discussion Forum : Strength of Materials - Section 4 (Q.No. 28)
28.
If the width of a simply supported beam carrying an isolated load at its centre is doubled, the deflection of the beam at the centre is changed by
Discussion:
28 comments Page 2 of 3.
Aqib faroow said:
4 years ago
The given answer is wrong.
In a simply supported beam when a) length is double deflection is double b) width is double then deflection is 1/2 and when depth is double then deflection 8 times.
In a simply supported beam when a) length is double deflection is double b) width is double then deflection is 1/2 and when depth is double then deflection 8 times.
Namita said:
6 years ago
1/2times is correct answer.
Vasu said:
6 years ago
1/2 is the correct answer.
Kk bhal said:
6 years ago
Yes, you are right, thanks @Raj.
JOHN MACLAIN said:
10 years ago
It will be 1/2 times,
Deflection = pl3/48EI.
I = bd3/12.
Deflection = k*1/b (where k = pl3/48E).
If b is doubled the deflection will be halved.
Deflection = pl3/48EI.
I = bd3/12.
Deflection = k*1/b (where k = pl3/48E).
If b is doubled the deflection will be halved.
Ram said:
7 years ago
I don't understand how it is 1/2?
Clearly said in the question that the load is doubled.
So the formula for deflection is Wl^3/48EI. So that W=2W so it is doubled.
@Yuvrahsinh
Here it didn't ask for the ratio of deflection.
I think option A is correct.
Clearly said in the question that the load is doubled.
So the formula for deflection is Wl^3/48EI. So that W=2W so it is doubled.
@Yuvrahsinh
Here it didn't ask for the ratio of deflection.
I think option A is correct.
Kishan said:
7 years ago
I think 1/2 is correct.
Raj said:
7 years ago
It is 8 times only. 1/ 2 for cantilever.
Jishan said:
7 years ago
The answer will be 1/2.
Ibrar Uddin said:
8 years ago
The question is wrong it should be length Instead of width.
Or if the above question is not wrong then answer will be 1/2.
Or if the above question is not wrong then answer will be 1/2.
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