MSD

UNIT 6

QUESTIONS

- What are objectives of Optimum Design
- What do you understand by Adequate and Optimum Design?
- What are the design Parameters
- Explain with examples the functional requirement and undesirable effects in a mechanical system.
- Explain the Johnson’s method of Optimum Design
- Explain redundant specifications.
- A thin spherical pressure vessel is subjected to an internal pressure of 5 N/mm2. The mass of the empty vessel should not exceed 150 kg. If the factor of safety based on yield strength is 2, design the pressure vessel with the objective of maximizing the gas storage capacity, out of the following materials

8. In a light weight equipment, a shaft is required to transmit 40kw power at 425rpm. The required stiffness of the shaft is 90 N-m/degree. The factor of safety based on yield strength in shear is 1.5. Using the maximum shear stress theory, design the shaft with objective of minimizing the weight out of the following materials:

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