Mechanical Engineering - Strength of Materials - Discussion
Discussion Forum : Strength of Materials - Section 1 (Q.No. 6)
6.
A steel bar of 5 mm is heated from 15° C to 40° C and it is free to expand. The bar Will induce
Discussion:
98 comments Page 4 of 10.
Vikas said:
1 decade ago
@Krish: Thermal stress is dependent on temp because: stress=E*alpha*diff. in temp. wr alpha is co-efficient of thermal expansion.
Rajamugesh said:
9 years ago
Heat causes the expansion, hence there is no support to restrict the expansion. Therefore no resistance, no stress induction.
MALLA SAI GIRISH said:
8 years ago
Here strain exits due to change in temperature. We know that stress is proportional to strain. Therefore stress is present.
Nagaraj said:
1 decade ago
Said that it is free to expand, i.e. there is no load. As stress depends upon the load applied, no stress in the body.
Shree said:
5 years ago
See know the induce meaning its give rise to. We are not applying any force, so there will be no such stress applied.
(2)
Karthik g.m said:
9 years ago
Because of increase in temperature, the resisting force will be less. So there should be no stress is developed.
AMAN KUMAR said:
1 decade ago
But the body try to resist the expansion thats why it is also a stress which is known as thermal stress.
Anil RANSHUR said:
8 years ago
As there is no constraint to restrict it expansion. As it is free to expand. So no stress is developed.
Leela said:
8 years ago
As there is no constraint to restrict it expansion. As it is free to expand. So no stress is developed.
Mech asar said:
1 decade ago
Steel's melting point is very high so there is no need of worry about stress with out any load apply.
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