Home » Interview Questions » Interviews at OEMs and Research labs – Strength/Stress Calculations

**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 sheet metal is subjected to both bending and axial load. Since both stresses have the axial direction these stresses could be added.

Let the area of the plate be A and plate thickness be h. The bending moment caused is, Fh and maximum stress caused is given by

Shafts in many product lines run at very high RPMs. The question is does this high RPM, lead to significant loading causing high hoop and radial stresses?

**Observation:** The critical fact is if the shaft is hollow or solid. Also, the shaft being a long cylinder it falls under plane strain conditions. Therefore, the equations used for hoop and radial stresses must be those derived assuming plane strain conditions for an axisymmetric cylinder. Generally, shafts are hollow as weight consideration is very critical to performance, and of course shaft integrity is of utmost significance.

- Discontinuity stresses in rotating components?
- What is free hoop radius?

- Interviews at OEMs and Research labs – Engineering Failures
- Interviews at OEMs and Research labs – Engineering Failures
- Interviews at OEMs and Research labs – Strength/Stress Calculations
- OEM and Research lab interview series for mechanical engineers be it learning or practicing
- What do we do to fill the Physics Gaps

- Contemporary Structural Engineering Design Practices ₹6,149.00
- Engineering Critical thinking ₹1,499.00
- Fundamentals of stress and vibration ₹699.00
- Graduate Finishing School ₹12,999.00
- Proficiency in Stress, Vibration and Simulation ₹8,850.00