[B=[4[N b5(1+n) 0 0 a(1+5) (i=1,2,3,4) a(1+55)b5(+)应力矩阵 G}=[D DIBRO)=skSe S=IDBIDBL DBI DB]=shs) s sI 对于平面应力问题 b5;(1+m) a(1+5) E b/l5;(1+nm) a(1+55) 4ab(-2)1 a(1+55) b5;(1+n }=[4j[N(,n){y =[4[N[4N…by (i=1,2,3,4) IBI Bk.Alloy 应变矩阵 [B(= D (i =1,2,3,4)        T e  = A N(,)            T T e = A N 1 A N 2           e = B 1 B 2  B 4     e = B  应变矩阵        e e = D B  = S  应力矩阵                S = D B 1 D B 2 D B 3 D B 4          = S 1 S 2 S 3 S 4 对于平面应力问题                 + − + − + + + + − = (1 ) 2 1 (1 ) 2 1 (1 ) (1 ) (1 ) (1 ) 4 (1 ) 2                   i i i i i i i i i i i i i a b b a b a ab E S      i T B i = A N ( 1,2,3,4) (1 ) (1 ) 0 (1 ) (1 ) 0 =           + + + + = i a b a b i i i i i i i i          