Options
Occurrence and propagation of delamination during the machining of carbon fibre reinforced plastics (CFRPs) : an experimental study
Publikationstyp
Journal Article
Date Issued
2011-08-22
Sprache
English
Author(s)
Volume
71
Issue
15
Start Page
1719
End Page
1726
Citation
Composites Science and Technology 71 (15): 1719-1726 (2011)
Publisher DOI
Scopus ID
Publisher
Elsevier
The machining of carbon fibre reinforced plastics (CFRPs) is often accompanied by delamination of the top layers of the machined edges. Such damage necessitates time-consuming and costly post-machining and in some cases leads to rejection of components. The work described in this paper systematically investigates the occurrence of delamination of the top layers during the machining of CFRP tape, with the focus being on the process of contour milling. The occurrence and propagation of delamination were studied by milling slots in unidirectional CFRP specimens having different fibre orientations and mainly analysing the slot tip. This allowed the key mechanisms to be clarified. The results show that delamination is highly dependent on the fibre orientation and the tool sharpness. The experiments allow derivation of a novel system for describing the occurrence and propagation of delamination during milling. Furthermore, the principles also apply for drilling. The results allow customisation of the machining procedure to reduce and in some cases totally avoid delamination, leading to a significant increase in the quality of components.
Subjects
A. Carbon fibres
A. Laminate
B. Delamination
B. Machining
C. Damage mechanics
DDC Class
600: Technik
620: Ingenieurwissenschaften
670: Industrielle Fertigung