Not being a mechanical engineer, I was looking at simple beam
deflection calculations in the machinery handbook and was wondering
why there seems to be a discrepancy from posted formula on various
For instance, for a beam with a single support and uniform load, the
handbook states for maximum deflection:
ymax (at end) = (wl^3)/(8EI)
the formula ymax = -(w * l^4) / (8 * E * I) at x = l
agrees with the results from beamboy and other postings. I also
measured it experimentally.
So I guess the question is l^3 vs l^4 unless E or I are calculated
differently in the handbook??
18 years ago