2nd INTERNATIONAL CONFERENCE ON LIFE AND ENGINEERING SCIEN, İstanbul, Turkey, 27 - 29 June 2019, vol.1, no.1, pp.285-291
Composites contain at least two materials which have different properties. Despite the new
material has superior property, machining of composite has many difficulties due to the nonhomogeneous
structure of composites. For this reason in addition to turning, drilling and milling,
laser ablation is the more preferred in machining of composite materials. When directed fiber
reinforced composites are laser-machined, it is impossible to obtain a circular cavity. Almost
circularity can be achieved for low laser energies while increasing the energy increases the
circularity distortion. This is because the fibers conduct heat much more than the polymer matrix.
In this study, 0.1 J, 1 J, 2 J, 3 J and 4J energies of pulses were sent to the composite material. The
Heat Affected Zone around the cavity formed on the composite material was measured.
Measurements were made with optical microscope images of the cavity. As a result of the
measurements, it was observed that the heat conduction through the fibers was 1.7 times higher
than the perpendicular to the fibers.