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 7 of 10.
Sandeeprathod1928@gmail.com said:
9 years ago
In Thermal Stresses the stress does not depends on temperature.
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.
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.
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.
Puthu said:
9 years ago
In case temp reduced from 50 to 30, then what will happen?
Maria talib said:
9 years ago
But stress = load/ area.
As a steel bar length increase with temperature and diameter of steel bar reduces and area value is affected which in result change in shear but it is not zero.
As a steel bar length increase with temperature and diameter of steel bar reduces and area value is affected which in result change in shear but it is not zero.
Puneet said:
9 years ago
But the rod will expand after heating.
Vaibhav b. said:
9 years ago
Stress is produced only restriction of strain. But there is strain without stress.
Bar expand freely so there is only strain in bar and no restriction of strain. So stress must be zero.
Bar expand freely so there is only strain in bar and no restriction of strain. So stress must be zero.
Kavita said:
9 years ago
The bar is free to elongate as there is no restriction hence stress induced is zero.
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