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.
Tambi durai said:
1 decade ago
A body subjected heating under free expansion state doesn't produce stress because it is free to expand. Unless something stops or constrains the expansion due to heat, the body dies not produce stress.
Rajamugesh said:
1 decade ago
Heat causes the expansion, hence there is no support to restrict the expansion. Therefore no resistance, no stress induction.
Hamed said:
1 decade 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.
Ethin said:
1 decade ago
Stress depending on temperature, s = alpha * t * e.
But here not constrained so no stress.
But here not constrained so no stress.
SUDHARSHAN said:
1 decade ago
The body is free to expand so no stress.
Divakar said:
1 decade ago
As there is no obstruction and the bar is free, no stress will be induced.
Suraj said:
1 decade ago
Only the thermal stress come in the picture.
Vatsal said:
1 decade ago
There is no restriction in expansion so no stress will generated.
Gauri shankar said:
1 decade ago
A free bar never had any stress. Its a fact.
Shijoh said:
9 years ago
It will be bending stress.
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