Normal Stress in a Straight Member Due to Bending Moment

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Questions and Answers

What is the main cause of normal stress in a straight member?

  • Shear force
  • Axial load
  • Torsional moment
  • Bending moment (correct)

In the analysis of normal stress due to bending moment, what assumption is made about the length of the member?

  • Length increases
  • Length decreases
  • Length remains unchanged (correct)
  • Length varies randomly

At which edge of a member does the maximum normal strain occur?

  • Edge furthest from the neutral axis (correct)
  • Edge closest to the neutral axis
  • Center of the member
  • No specific edge

What is the value of the normal strain at an arbitrary location Y in the member?

<p>-Y/Rho (B)</p> Signup and view all the answers

How does normal stress vary along the Y axis in a straight member under bending moment?

<p>Follows a linear distribution (D)</p> Signup and view all the answers

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Study Notes

  • Introduction to normal stress caused by bending moment in a straight member
  • External moments cause internal bending moment in the member, leading to deformation
  • Assumptions made for analysis: neutral plane curves but length remains unchanged, cross-sections remain perpendicular to neutral plane, shape and size of cross-section remains unchanged
  • Normal strain at arbitrary location Y calculated as epsilon = -Y/Rho
  • Maximum normal strain occurs at edge furthest from neutral axis, with value of C/Rho
  • Normal stress follows linear distribution along Y axis, with maximum stress occurring at the same edge
  • Derivation of equation for maximum normal stress (Sigma max = MZC/Iz) and normal stress at arbitrary location Y (flexure formula)

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