Torsion in Circular Shafts Video Lecture | Strength of Materials (SOM) - Mechanical Engineering

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FAQs on Torsion in Circular Shafts Video Lecture - Strength of Materials (SOM) - Mechanical Engineering

1. What is torsion in circular shafts?
Ans. Torsion in circular shafts refers to the twisting or rotational deformation that occurs when a torque or twisting moment is applied to the shaft. It is a result of shear stress acting along the cross-section of the shaft, causing it to rotate about its longitudinal axis.
2. How is torsion calculated in circular shafts?
Ans. Torsion in circular shafts can be calculated using the formula T = τ × J/r, where T is the applied torque, τ is the shear stress, J is the polar moment of inertia of the shaft's cross-section, and r is the distance from the center of the shaft to the point of interest.
3. What are the factors that affect torsional strength in circular shafts?
Ans. Several factors can affect the torsional strength of circular shafts, including the material properties (such as shear modulus and yield strength), the shaft's geometry (such as diameter and length), and the applied torque or twisting moment. Additionally, the shaft's surface condition and temperature can also influence its torsional strength.
4. How does torsion affect the design of circular shafts?
Ans. Torsion plays a crucial role in the design of circular shafts as it determines the shaft's ability to withstand applied torques without experiencing excessive deformation or failure. Engineers must consider factors such as material selection, shaft diameter, length, and the desired level of safety to ensure the shaft can handle the expected torsional loads.
5. How can torsional failure be prevented in circular shafts?
Ans. To prevent torsional failure in circular shafts, designers can take measures such as selecting materials with high torsional strength, increasing the shaft's diameter and length, and ensuring proper surface finishes to resist fatigue and stress concentration. Additionally, adding features like keyways or splines can improve the shaft's ability to transmit torque effectively.

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