Composites A, Applied Science and Manufacturing vol:29A issue:12 pages:1579-1588
The fibre orientation distributions in different types of warp knitted fabric are studied. The fibre orientations are represented by orientation tensors. This allows for the production of second- and fourth-order approximations of the orientation distribution function, which contain the relevant part of the orientation distribution for second- and fourth-order tensorial properties, respectively. Also, the symmetry that is present in the knitted fabrics can be analysed with the help of orientation tensors. It is shown that all the knitted fabrics are 'almost' monoclinic. Determination of the 'nearly' on-axis coordinate system is of interest for the data reduction of tensile test data. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.