An OEM or a research interview is designed to test the ability of the candidate to solve a problem by applying physics driven thinking skills. Unless the interviews are for people who would develop mechanical methods/mathematical models for high-end research interviews mostly check fundamentals, application and thinking skills.
Analysis: The cylinder is assumed to be thin and is suffers both hoop and longitudinal stresses which are tensile in nature. If the cylinder is open then it suffers only hoop stress.
If the cylinder has to suffer the compressive strain, it is the Poisson’s effect that is responsible
Where v is the poisson′s ratio and E is the Young′s modulus
Observation: We must observe that E, Young’s modulus at elevated temperature decreases significantly hence the actual E at that temperature must be assumed. Also capturing the worst operating temperature becomes very important.
Temperature and effect of rotation effect
One must observe the following
First, understand all the factors that are influenced by BSS
Observation: The bearing support structure again is influenced by temperature.
Consider an idealised shaft and bearing support structure