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Mechanical Engineering - Strength of Materials - Discussion

Discussion Forum : Strength of Materials - Section 5 (Q.No. 35)
Strength of Materials
35.
The deformation of a bar under its own weight is __________ the deformation, if the same body is subjected to a direct load equal to weight of the body.
equal to
half
double
quadruple
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
8 comments Page 1 of 1.
Pravin Doifode said:   4 years ago
Actually, the deformation under a concentrated load P at the end will give deformation equals to PL/AE. The deformation due to self-weight is is give by (YL^2)/2E where Y is the unit weight but on solving this by integration we will get the answer PL/2AE.

So, option B is correct.
Pravin Doifode said:   4 years ago
Actually, the deformation under a concentrated load P at the end will give deformation equals to PL/AE. The deformation due to self-weight is is give by (YL^2)/2E where Y is the unit weight but on solving this by integration we will get the answer PL/2AE.

So, option B is correct.
Rajesh Padumu said:   8 years ago
The deformation of a bar under its own weight = Wl^2 / 2E.
whereas Deformation under direct load = Wl^2 / E.
therefore The deformation of a bar under its own weight is ___1/2___ the deformation if the same body is subjected to a direct load equal to the weight of the body.
Syed mahroz said:   5 years ago
The answer is half because.

Deformation due to direct load =Wl/AE.
And deformation due to self wt. Is WL/2AE.
Shriyansh Yadav said:   5 years ago
How came Wl2/E.
But in case of direct load Pl/AE.
So, in this case, it should become Wl/AE.
Adarsh said:   5 years ago
Young's modules is E.
Rajesh said:   6 years ago
E stands for what?
Raj said:   8 years ago
How? Explain.
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