Mechanical Engineering - Strength of Materials - Discussion
Discussion Forum : Strength of Materials - Section 1 (Q.No. 34)
34.
When a bar is cooled to - 5°C, it will develop
Discussion:
105 comments Page 5 of 11.
Harish reddy said:
1 decade ago
Compressive stress is the right answer because no specific case is given.
Hitesh said:
1 decade ago
Stress is the force of resistance per unit area, offered by a body against deformation.
Here the bar is cooled, so it will try to contract. So tensile stress will develop in the bar to resist deformation.
Here the bar is cooled, so it will try to contract. So tensile stress will develop in the bar to resist deformation.
Ganesh said:
1 decade ago
@Hitesh.
As per your answer if in-case the bar is heated then thermal (compressive) stresses will be developed even without any constraints. Could you please explain?
As per your answer if in-case the bar is heated then thermal (compressive) stresses will be developed even without any constraints. Could you please explain?
Varsharanai said:
1 decade ago
Compressive stress is right answer. If not then hows tensile stress?
Ajay said:
1 decade ago
Bar tensile to shrink then metal oppose it so tensile stress induce.
Dar Mehraj said:
1 decade ago
It's definitely tensile stress as the resistance has to be against compression which is tensile stress as cooling results in contraction.
PANKAJ said:
1 decade ago
No stress will develop because the bar is free to expand.
Robin said:
10 years ago
Question has insufficient information.
Mithun said:
10 years ago
Tensile stresses of developing only if bar is fixed on both sides. No stress is developed if it is allowed free contraction or free expansion.
Lokesh singh said:
10 years ago
During the time of cooling the bar will go under shrinkage. But when the bar will be taken away from cooling area then it will try to get its original size then tensile force will occurs inside it. So tensile stress should be the answer.
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