Shaft Angle of Twist Calculation
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Questions and Answers

What is the formula used to compute the angle of twist in torsional deformation?

  • $\theta = \frac{T \cdot J}{G \cdot L}$
  • $\theta = \frac{T \cdot L}{G \cdot J}$ (correct)
  • $\theta = \frac{G \cdot J}{T \cdot L}$
  • $\theta = \frac{L}{T} \cdot G \cdot J$
  • For a solid shaft, what is the expression for the polar moment of inertia?

  • $16\pi\frac{d_o^4 - d_i^4}{32}$
  • $32\pi\frac{d_o^4 - d_i^4}{32}$ (correct)
  • $\pi\frac{d^4}{64}$
  • $8\pi\frac{d^4}{64}$
  • In torsional deformation, what happens to the angle of twist if the length of the shaft increases?

  • The angle of twist remains constant.
  • The angle of twist becomes zero.
  • The angle of twist increases. (correct)
  • The angle of twist decreases.
  • What is the ultimate strength of the material in psi?

    <p>110,000</p> Signup and view all the answers

    What is the factor of safety required for the round steel bar?

    <p>10</p> Signup and view all the answers

    In the power-torque-speed relationship, what is the unit of torque given in the example?

    <p>N.m</p> Signup and view all the answers

    What happens to a shaft when it is subjected to torque?

    <p>It undergoes twisting</p> Signup and view all the answers

    What type of stress is experienced by a body when a twisting force is applied?

    <p>Torsional stress</p> Signup and view all the answers

    In the context of the text, what is the unit for direct tensile stress typically measured in?

    <p>MPa</p> Signup and view all the answers

    What happens to the polar moment of inertia when a solid shaft's diameter is increased?

    <p>Increases</p> Signup and view all the answers

    If a steel rod is subjected to both tensile and torsional loads simultaneously, what type of stress will be present?

    <p>Combined stress</p> Signup and view all the answers

    Study Notes

    Torsional Deformation

    • The angle of twist is computed using a specific formula.
    • In torsional deformation, the angle of twist increases when the length of the shaft increases.

    Polar Moment of Inertia

    • For a solid shaft, the expression for the polar moment of inertia is known.
    • The polar moment of inertia increases when a solid shaft's diameter is increased.

    Material Properties

    • The ultimate strength of the material is measured in psi.
    • A factor of safety is required for the round steel bar.

    Power-Torque-Speed Relationship

    • The unit of torque is given in a specific unit in the example.

    Torsional Stress

    • When a shaft is subjected to torque, it experiences twisting.
    • A twisting force applied to a body results in torsional stress.
    • In the context of the text, direct tensile stress is typically measured in a specific unit.

    Combined Stress

    • When a steel rod is subjected to both tensile and torsional loads simultaneously, it experiences both types of stress.

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    Description

    Learn how to compute the angle of twist in a shaft using the formula 𝜃=𝐺𝐽/𝑇𝐿. This specific example involves calculating the angle of twist for a steel shaft with given dimensions and torque.

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