Compos.Sci.Technol. 64, 1403--1410, 2004
D. Pahr and F.G. Rammerstorfer
Institute of Lightweight Design and Structural Biomechanics,
TU Wien, Vienna, Austria
This paper is focussed on the determination of various material properties
under static loading conditions of perforated and non-perforated carbon fiber
reinforced 2/2 twill weave laminates as well as on the verification of
Experimental stiffness and strength results are obtained for non-perforated
single plies, non-perforated [0/45/90] lay-ups and perforated [0/45/90]
The single ply results of the non-perforated material are used as input values
for the numerical calculations based on homogenization in combination with
classical lamination theory or finite element analyses.
Tests were done by acoustic emission testing technique to obtain first ply
failure strength values.
Critical gage lengths are discussed in the case of perforated laminates.
Finally experimental and numerical stiffness and strength results are compared
to show the capability of the numerical models for predicting reliable material