ECCM-17, 17th European Conference on Composite Materials, Date: 2016/06/26 - 2016/06/30, Location: Munich, Germany
Proc. 17th European Conference on Composite Materials (ECCM-17)
Author:
Keywords:
composite, automated fibre placement, fibre misalignment, characterization, MicroCT
Abstract:
A method for characterization of fibre misalignment in composite laminates manufactured by automated fibre placement/tape laying (AFP/ATL) is presented. It is applied to laminates produced with in-autoclave (prepreg technology) and out-of-autoclave (vacuum assisted resin infusion) processes. The measurement identifies three types of the fibre misorientation: deviation of the tapes from their nominal direction and inter-tape scatter of the fibre in-plane and out-of-plane orientation angles. For both materials the tape misorientation is about 1° or less (in different plies); the fibre out-of-plane misorientation (standard deviation of the angle) is 1…2°. The inter-tape fibre misorientation in-plane is 1…2° for in-autoclave and 2…4° for out-of-autoclave laminates. The results can be used for estimation of properties such as stiffness, strength, and permeability, as well as for evaluation of manufacturing allowances associated with the precision of the AFP/ATP process.