The discussion centers on calculating shear resistance and moments about the X and Y axes using compressive and tensile stresses. Participants clarify that the shear load is induced by the same total force that causes the moment, emphasizing the relationship between these forces. The confusion arises from the lack of a moment arm value, which is crucial for solving the problem. The conversation highlights the importance of understanding the interplay between shear and moment in structural analysis.
PREREQUISITESStudents in civil or mechanical engineering, structural engineers, and anyone preparing for exams related to mechanics of materials and structural analysis.
Thank you for your response.. it really helped me focus on a point I had overlooked: that the same forces causing the moment are also responsible for the shear, even though they affect the member in different ways.Lnewqban said:Welcome!
The shear load (think of a scissor trying to cut a sheet of paper) is induced by the same total force that induces the moment (which magnitude depends on the distance between the point of application of that force and the cross-section of interest).
Please, see:
https://efficientengineer.com/shear-force-and-bending-moment-diagrams/