ABSTRACT
The large square bracket is a matrix and the scalar quantity E/l - v2 preceding it indicates that every element in the matrix has to be multiplied by it. Defining the matrix [D] as
allows us to write the constitutive relations in matrix equation form as:
{a} = [D]{e} (A4.7)
eqn. (A4.7) but with a redefinition of the two vectors and the matrix as follows:
v 0 v 0
(A4.8)
where the aij are individual numbers of variables. [A] contains m x n such elements, has m rows and n columns. The size of [A] is therefore denoted by (m x n).