Theory of Machines: Machine Design and Applications



What is 'machine design'?

Machine design involves creating mechanical components and systems that are efficient, reliable, and fit for purpose.

What considerations are important in the material selection for machine components?

Material selection depends on strength, toughness, corrosion resistance, weight, and thermal stability.

What is the role of tolerances in machine design?

Tolerances specify allowable variations in dimensions to ensure parts fit and function correctly.

Define 'factor of safety' in machine design.

Factor of safety is a design criterion ensuring components withstand loads beyond expected conditions.

How does ergonomics influence machine design?

Ergonomics influences machine design by enhancing user interaction, safety, and comfort.

Why is load analysis essential in machine design?

Load analysis ensures that components can sustain expected forces and stresses during operation.

What is the significance of CAD in machine design?

CAD (Computer-Aided Design) allows for precise modeling, simulation, and optimization of components.

What is fatigue in the context of machine components?

Fatigue refers to the weakening or failure of material due to repeated stress cycles.

Explain the purpose of lubrication in machines.

Lubrication reduces friction and wear between moving parts, extending machine life.

What are the common types of machine joints?

Common machine joints include welded, bolted, and riveted joints.

When is a gear train used in machine design?

Gear trains are used to transfer motion and power between machine components with modified torque and speed.

Explain the concept of 'creep' in materials.

Creep is the gradual deformation of materials under constant stress over time.

What is the importance of thermal analysis in machine design?

Thermal analysis predicts how temperature changes affect machine performance and material properties.

What are the design considerations for creating a durable machine?

Considerations include selecting appropriate materials, ensuring proper stress distribution, and accounting for wear and tear.

What is the purpose of a stress-strain diagram in design applications?

A stress-strain diagram helps visualize material behavior under stress, informing design choices.