Recent content by emRage

Thanks for ur help, Ok so here's the next question, C-section beam of 300mm , Sy = 1000N Finding bending stresses 100mm from the point of load...The force causes compression on top and tension on the bottom hence bottom stresses should be +ve and top stresses -ve. 100mm from the point of...

This one I've figured out! :-p x = cos(theta) . s y = sin(theta) . s dA = ds . thickness limits for s = L/2 and -L/2 Thanks anyway!

Thank you tiny-tim, Now my next question is: The arrows for F and F+dF are facing that way to cancel out the hidden F and F+dF. Why do the (visible) arrows have to face that particular direction? Because if I were to change the direction they are facing, that would change the shear force...

Hi guys, I would like to derive the Ixy equation from simple integration and I can't seem to get the right answer (third equation down the picture). I seem to be able to derive Ixx and Iyy easily but product moment of area requires first moment of area to be calculated and I just don't know...

Hi everyone, I'm struggling to get my head around the convention of internal moments and shear forces of a loaded beam. I just can't seem to make any sense of why F is facing upwards and F+dF is facing downwards. It's driving me absolutely insane. Surely both of them will be facing upwards...