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 1 of 11.
Akki said:
1 decade ago
Why if bar is cooled then bar in compressive stress? Please explain me.
Mahendra said:
1 decade ago
The tensile stress answer may be correct when bar is fixed at both end otherwise no stress will developed in bar.
Rushi said:
1 decade ago
It's not sufficient ans-please, formulation description required.
Arun said:
1 decade ago
When a bar is cooled to -5 temp it must goes to compressive stress. Whenever a body is cooled its undergoes shrinkage. So compressive stresses are developed.
Praveen said:
1 decade ago
Ya in view compressive stress is correct if you place bread in freezer in -5 temp it will shrink same when you place a iron bar in freeze the molecules in the iron will able expand it will undergo shrinkage.
Arun said:
1 decade ago
When a body is cooled at -5c create the compressive load its solidly correct.
VIPIN said:
1 decade ago
If the load is compressive the stress is also produced is compressive stress.
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 !
Prerana said:
1 decade ago
@Taniya, then compressive stress should be developed in bar undergoing free expansion due to heating?
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.
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