Gcj

dO 9

dr r

dO 9

dr r

The maximum stress for the clamped edge condition will thus be obtained at the edge where r — R and at the surface of the plate where u = t/2, i.e.

E t 2qR2 3qR

N.B.-It is not possible to determine the maximum stress by equating dar/dr to zero since this only gives the point where the slope of the or curve is zero (see Fig. 7.7). The value of the stress at this point is not as great as the value at the edge. Similarly,

0 0

Post a comment