i know that
now im looking for the maximum stress so i will find that at the point at the centre of the rectangle
now d changes as a function of X
i know that τ is constant from x=0 to x=L
but V is constant throughout and so is b, so how can this be?
i tried making a differential equation where i know d(0)=do and d(L)=0 using dτ/dx=0 but really didnt manage