Characterization and Effects of Fiber Pull-Outs in Hole Quality of Carbon Fiber Reinforced Plastics CompositeReport as inadecuate


Characterization and Effects of Fiber Pull-Outs in Hole Quality of Carbon Fiber Reinforced Plastics Composite


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1

Tube Specialties Company, Troutdale, OR 97060, USA

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School of Engineering and Computer Science, Washington State University, Vancouver, WA 98686, USA





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Academic Editor: Redouane Zitoune

Abstract Hole quality plays a crucial role in the production of close-tolerance holes utilized in aircraft assembly. Through drilling experiments of carbon fiber-reinforced plastic composites CFRP, this study investigates the impact of varying drilling feed and speed conditions on fiber pull-out geometries and resulting hole quality parameters. For this study, hole quality parameters include hole size variance, hole roundness, and surface roughness. Fiber pull-out geometries are quantified by using scanning electron microscope SEM images of the mechanically-sectioned CFRP-machined holes, to measure pull-out length and depth. Fiber pull-out geometries and the hole quality parameter results are dependent on the drilling feed and spindle speed condition, which determines the forces and undeformed chip thickness during the process. Fiber pull-out geometries influence surface roughness parameters from a surface profilometer, while their effect on other hole quality parameters obtained from a coordinate measuring machine is minimal. View Full-Text

Keywords: carbon fiber reinforced plastic CFRP; drilling; fiber pull-out; hole quality carbon fiber reinforced plastic CFRP; drilling; fiber pull-out; hole quality





Author: Sina Alizadeh Ashrafi 1, Peter W. Miller 2, Kevin M. Wandro 2 and Dave Kim 2,*

Source: http://mdpi.com/



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