Hole quality assessment in drilling process of basalt/epoxy composite laminate subjected to the magnetic field

Farhad Najarian,Ali Farokhi Nejad,Abbas Razavykia,Roozbeh Alipour

doi:10.1051/meca/2019063

Abstract

Drilling is one of the most important machining processes which are currently carried out on fiber-reinforced composites. These composites possess a layered structure and different properties through their thickness. When drilling such structures, internal defects like delamination occur, caused by the drilling forces and their uneven distribution among the plies. The current study investigates the effect of magnetic field on drilling process of basalt/epoxy composite laminate in order to reduce delamination and the thrust force and improve some hole quality parameters i.e. roughness and cylindricity. A comparison is made between the responses for both normal drilling and drilling with applying a magnetic field. For this purpose, after finding the best combinations of normal drilling parameters, magnetic field is applied to the different configurations of solenoids on the setup of the drilling process. The results highlighted that using different magnet solenoids on the top and the bottom of drilling zone reduces the delamination and can obtain better roughness and cylindricity with lower damage.

Highlights

Since components made from the fiber-reinforced composites are generally integrated into a mechanical assembly, drilling is the most frequently encountered machining process in the production plan to provide fixing features like holes [5]
The present study investigates the effect of magnetic field on drilling process of basalt/epoxy composite laminate in order to reduce delamination and the thrust force and improve some hole quality parameters i.e. roughness and cylindricity
After finding the best combinations of normal drilling parameters, magnetic field is applied to the different configurations of solenoids on the setup of drilling process

Summary

Introduction

Due to owning lightweight and flexibility characteristics, the use of fiber-reinforced composites is widely extending in aerospace fields and driven by the developments in manufacturing technologies, which have made the production process more cost effective. This extensive application rises from the excellent customizable mechanical properties while being much more lightweight than metallic alloys [1–3]. Since components made from the fiber-reinforced composites are generally integrated into a mechanical assembly, drilling is the most frequently encountered machining process in the production plan to provide fixing features like holes [5].

Methods

Results

Conclusion