Dynaspede Integrated Systems Mechanical Engg. Design Interview Questions, Process, and Tips

Transmission elements are used to transmit power and motion between machine components.

• Transmission elements include gears, belts, chains, and shafts.

• Design considerations include torque, speed, power, and efficiency.

• Materials selection is important for strength, durability, and wear resistance.

• Lubrication and cooling are also important factors to consider.

• Examples of transmission element designs include spur gears, V-

The gear ratio of the pulley and driven is selected based on the desired speed and torque of the system.

• Determine the required output speed and torque

• Calculate the input speed and torque

• Select a gear ratio that matches the input and output requirements

• Consider factors such as efficiency, noise, and cost

• Perform testing and adjustments as necessary

Shear stress of a shaft can be calculated using the formula T/J = τ/R

• Calculate torque (T) applied to the shaft

• Determine the polar moment of inertia (J) of the shaft's cross-sectional area

• Find the radius (R) of the shaft

• Use the formula T/J = τ/R to calculate the shear stress (τ) of the shaft

• Shear stress can also be calculated using the maximum shear stress formula τmax = Tc/J

• Where Tc is the torsional stress at the outer

Torsion strength of a shaft can be calculated using the formula T/J=Gθ/L

• T is the torque applied to the shaft

• J is the polar moment of inertia of the shaft

• G is the shear modulus of the material of the shaft

• θ is the angle of twist

• L is the length of the shaft

• Example: For a solid circular shaft, J=πd^4/32 where d is the diameter of the shaft