Eventos Anais de eventos
COBEF 2017
Congresso Brasileiro de Engenharia de Fabricação
METHOD FOR ASSESSING HOLE DAMAGES IN COMPOSITE MATERIALS
Submission Author:
Marcelo Batista , SP
Co-Authors:
Alessandro Rodrigues, Igor Basso, Fernando Brandão de Oliveira, Francisco de Assis Toti
Presenter: Marcelo Batista
doi://10.26678/ABCM.COBEF2017.COF2017-0521
Abstract
This paper proposes a new methodology to assess hole damages in carbon fiber reinforced thermoplastic polymer. Differently from current evaluation methods, Global Damage proposed in this paper considers damages related to material mechanical strength reduction and damages regarded to assembling troubles. Both damage groups are weighted to compound the Global Damage. Cutting speed and feed speed were experimentally carried out in a Romi-D600 machining center using a 6 mm diameter diamond coated carbide drill. Feed force and cutting torsion were measured by using a 9272 4-component Kistler dynamometer. The damages were observed by employing the Axiotech Carl Zeiss and the 3D Olympus OLS4100 microscopes, then they were quantified by a CAD software. The Global Damage showed to be able to evaluate the several types of hole damages and their phenomena. Furthermore, it showed to be more embracing than the habitual delamination factor. The weights balance can be adapted for a given specific application being useful to analyze drilling phenomenon and to improve the machining process.
Keywords
Composites, Drilling, delamination, hole quality
