Mechanical Engineering - Strength of Materials - Discussion

Discussion Forum : Strength of Materials - Section 1 (Q.No. 10)
The stress induced in a body, when suddenly loaded, is __________ the stress induced when the same load is applied gradually.
equal to
four times
Answer: Option
No answer description is available. Let's discuss.
25 comments Page 3 of 3.

K.p said:   1 decade ago
It is experimentally proved that the stress developed by impact load is twice than developed by gradually applied load.

Siva bala said:   1 decade ago
In case of impact loading the dynamic force experienced by the body is given by P(dyn.) = W*[1+sqrt(1+2h/D)].

Here P = dynamic load experienced by the body.
W = static load which is impacting.
D = stact deflection due to above load.
h = height from which load is acting.

In this case h=0, So dynamic load experienced by the body is twice the load applied. As load to area is stress so stresses induced will be twice.

Abinash said:   1 decade ago
When the load is applied slowly due to viscous dissipation by the atmosphere only half of the energy is stored as compared to the case when the load is applied suddenly.

Dara Singh said:   1 decade ago
Twice stress why & which formula used this it may be more than twice or little less than twice.

Akshay patil said:   1 decade ago
Suddenly applied load, having higher velocity compared to gradually applied load.

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