Mechanical Engineering - Strength of Materials - Discussion
Discussion Forum : Strength of Materials - Section 8 (Q.No. 7)
7.
The strain energy stored in a body, when suddenly loaded, is __________ the strain energy stored when same load is applied gradually.
Discussion:
21 comments Page 1 of 3.
Salah said:
3 years ago
It depends on the elongation too. For the same deltaL, U2 is twice U1.
AMIT Singh said:
4 years ago
U = (stress square*Volume)/2.
For sudden loading Stress = 2W /A so put the value and you find U2= 4 times of U1.
For sudden loading Stress = 2W /A so put the value and you find U2= 4 times of U1.
RAJAT PATEL said:
5 years ago
Answer is D
U=1/2 * P * delta
Delta= P * V/E
So U= P * δ/2E
Put the value of p for gradually applied.
And The value of 2p for suddenly applied load.
So the answer is 4 times.
U=1/2 * P * delta
Delta= P * V/E
So U= P * δ/2E
Put the value of p for gradually applied.
And The value of 2p for suddenly applied load.
So the answer is 4 times.
Raj said:
5 years ago
The answer Should be D.
Jyoti yadav said:
5 years ago
Stress is 2 times.
But strain is 4 times.
But strain is 4 times.
(2)
Raju said:
6 years ago
We know U=strain energy, U= Pdl.
Take, Us = strain energy stored suddenly and Ug= strain energy stored gradually.
Us = Pdl, Ug=1/2Pdl.
Asked, Us=_____Ug?
Answer. Pdl = 1/2Pdl.
Therefore Us = 1/2 Ug.
Take, Us = strain energy stored suddenly and Ug= strain energy stored gradually.
Us = Pdl, Ug=1/2Pdl.
Asked, Us=_____Ug?
Answer. Pdl = 1/2Pdl.
Therefore Us = 1/2 Ug.
Rajkotha said:
6 years ago
Stress it is two times.
Strain it is four times.
Strain it is four times.
Gelot said:
6 years ago
Yes, you are right, Thanks @Cpv.
Hirak said:
6 years ago
Strain energy for the suddenly applied load is 4 times the gradually applied load. And stress energy due to suddenly applied load is twice the gradually applied load.
Karthik raja said:
7 years ago
The correct answer is two times.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers