Bending Stress and Shear Stress

[narii]

I have a question that I couldn’t fully understand its logic. The professor asked us to calculate the shear resistance and moment about the X and Y axis, using the given cross-section and the values of compressive and tensile stresses. I understand how to get the moment, but I’m confused about how to find the shear resistance from these stresses. Could you explain or clarify the method?

 

[Lnewqban]

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/

 

[narii]

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/

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.

However, I still don’t quite understand how to solve the question, especially since I don’t actually have the moment arm value.

No worries, this isn’t a graded assignment it’s just a revision question, as we’re currently preparing for our exams.