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 8 of 10.
Vaijinath said:
1 decade ago
Basically stress is internal resistance of a body to applied load unlike pressure (Though both have same unit). Here there is no applied load rather there is no constraint for the bar which means no internal resistance to the deformation therefore the induced (internal force within a body) is zero, correspondingly the stress is zero.
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.
Psd said:
1 decade ago
Stress is not related to temperature. Stress is always force per area.
Pari.siva said:
1 decade ago
Length is proportional to temperature,
But, there is increase the temperature one stage to another stage so in this case affected to thermal stress.
But, there is increase the temperature one stage to another stage so in this case affected to thermal stress.
Sushant said:
1 decade ago
If the free expansion is prevented then thermal stress will produce otherwise not.
AMARAJIT said:
1 decade ago
Thermal stress depends on E, as young's modulus is not given stress is zero.
Sagar said:
1 decade ago
This Bar Is The Free to Expand. Hence no Resisting force is there so no stress Developed.
SAGAR DAGALE said:
1 decade ago
How stress is not related to temperature?
Manveer said:
1 decade ago
When no load on metal rod then stress and strain curve define is call plastic flow.
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.
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