Hi everyone,
I'm wondering about the direction of Mx and My in picture below. Should Mx and My bend around y and x-axis respectively?
Thank you for your kind response.
Here Mx and My are acting along the respective axis and not about the axis. It depends on local orientation of the plate. So, for example the reinforcement required for Mx should be placed along local x axis.
Answer Verified By: Phonlayuth T
I understand it. Thank you.
You are welcome. I would also like to add that for plates and shells, the definition of MX and MY is based not on beam theory, but it is based on plate theory. Refer to the book "Theory of Plates and Shells" by Timoshenko. Mx is defined as the moment that causes the bending stress to act along the X axis of the element. My is defined as the moment that causes the bending stress to act along the Y axis of the element.