DESIGN OF LAMINATES 6-191 



K-. and K are obtained from the equations previously given. 



H = E ^ fh-cl + E C 

 y yf L J yc 



For the case of all edges simply supported the C values used 

 in evaluating 1^ and K~ are: 



b n a 



C l = C h = ^2 > C 2 = I? G 3 = ^ 



In using equation 6. 96 it is necessary to use a minimum value for K. This is obtained 

 by substituting n = 1, 2, 3, etc. successively in the formulae for Kf and K m and determining 

 which value of n produces the minimum K. 



