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 3 of 10.
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.
Jay sutar said:
9 years ago
In the bar stresses are not induced up to the bar is freely expand. When any disturbance comes in contact with bar stress is starting to produce.
G k said:
9 years ago
Stress acts against applied restriction. As in this case, there is no restriction against expansion so there will not be any stress in the rod.
Sumeet saha said:
1 decade ago
If the bar is fixed (rigid) at any one or both side, the a compressive stress will produced. Otherwise in free bar no stress will produced.
Pankaj kumar said:
9 years ago
Because of if anybody is subjected to free expand or contact with the rise in temperature. Then no stresses will cause induced in the body.
Suresh said:
1 decade ago
Strain occurs dude to change in length then the product of young's modulus and strain gives the stress developed in the bar. Is it correct?
Ajey negi said:
8 years ago
Thermal stress induced only if constrain is also provided it means it should be fixed from one end when given the heat per temperature.
Hamed said:
9 years ago
When heating a body tensile stress will be indicated.
Stress = thermal coefficient x change in temperature x modulus of elasticity.
Stress = thermal coefficient x change in temperature x modulus of elasticity.
Ganesh pise said:
1 decade ago
Stress is not related to temperature. It related to resisting force per unit area. So, free expansion of bar no stress is induced.
Chetan sagar said:
1 decade ago
Since it is given that condition is Free to expand so no stress is produce because stress is the resistance to the external force.
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