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Mechanical Engineering - Strength of Materials - Discussion

Discussion Forum : Strength of Materials - Section 1 (Q.No. 34)
Strength of Materials
34.
When a bar is cooled to - 5°C, it will develop
no stress
shear stress
tensile stress
compressive stress
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
106 comments Page 4 of 11.
Pradeep said:   1 decade ago
Stress is resistance towards deformation. So tensile is correct.
Bharat said:   1 decade ago
This true only when bar is fixed.
Sagar said:   1 decade ago
Due to cooling inter molecules try to shrinking while it makes body to compress but to resist this compressive forces internally tensile forces develops in a body.

Now you got dear friends?

Thank you.
Shubham Patil said:   1 decade ago
The right answer is Compressive Stress, because in question it is not mentioned that it is fixed or not.
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.
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?
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.
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