so I have quickly gone over this, but feel that I am not going in the right direction.
I am assuming Y = 1 so,
62 = 164 sqrt Ka
given UTS = 164 Mpa
Kic = 62 Mpa m1/2
therefor,
working for ac, (the damage tolerance of the material)
Oa = UTS = 164 Mpa
Kic = Y Oa sqrt ac
62 = 1 * 164 *...