Podcast
Questions and Answers
What is the main cause of normal stress in a straight member?
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?
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?
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?
What is the value of the normal strain at an arbitrary location Y in the member?
How does normal stress vary along the Y axis in a straight member under bending moment?
How does normal stress vary along the Y axis in a straight member under bending moment?
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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Description
This quiz covers the concept of normal stress induced by external bending moments in a straight member. It includes the assumptions made for analysis, calculation of normal strain at an arbitrary location, and the derivation of equations for maximum normal stress and normal stress at any location along the member.
