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 10 of 11.
Shoeba said:
1 decade ago
Compressive stress is right answer because bar is cooled.
Nikhil said:
1 decade ago
As on applying heat there is no stress will induced likewise on cooling too no stress is developed. Because until we apply any external forces on bar there is no tensile, compressive or shear stresses induced.
Manoj said:
1 decade ago
No shear stress will be developed.
Abdusebur said:
1 decade ago
@Mahendra got the point. If the bar fixed at the both end, if it cooled to temperature -5 then it is shrink, when shrink it pushes from the two ends.
Subbam kumar said:
1 decade ago
Tensile stress will be induced if and only if both the two ends are fixed. If ends are not fixed no stress will be induced. Here nothing is mentioned as such.
Nishanth Kallada said:
1 decade ago
Data in question is not sufficient, if there has no restriction for contract then there will no stress will develop.
Prerana said:
1 decade ago
@Taniya, then compressive stress should be developed in bar undergoing free expansion due to heating?
Taniya said:
1 decade ago
When the temp decreases, the material is prevented from contracting. Therefore tensile stresses are induced.
The question does NOT ask which stress is being applied. Its asking what stresses will the bar develope !
The question does NOT ask which stress is being applied. Its asking what stresses will the bar develope !
VIPIN said:
1 decade ago
If the load is compressive the stress is also produced is compressive stress.
Arun said:
1 decade ago
When a body is cooled at -5c create the compressive load its solidly correct.
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