Influence of Layer Thickness and Infill Density on the Impact Strength of Carbon Particle and Polylactic Acid (CP/PLA) Composite

Authors

  • Hiyam Adil Habeeb , Ahmed Hadi Abood , Ahmed Esmael Mohan

Abstract

This investigation presents a new perspective on the different parameters used to
manufacture various objects. The technology of additive manufacturing for thermoplastic material
prototypes was applied for the infused deposition technique. This study focused on the impact of layer
thickness and infill density on the mechanical characteristics of specimens of polylactic acid (PLA)
and carbon particle/PLA composite (CP/PLA). The test of Izod impact was conducted on the
specimens. In accordance with ISO standards, test specimens were created by various layer thicknesses
(0.01, 0.02 and 0.03 cm) with various infill densities by using a PLA and CP/PLA composite. A system
of 3D printing and the impact strengths were verified for other factors, including part orientation, infill
density, shell thickness and print speed. Increasing the thickness of layers from 0.01 to 0.03 cm
positively affects the mechanical characteristics, whereas the impact force of the specimen increases
with the increase in infill density. The best PLA specimens’ impact strength was determined at 0.01
cm as a thickness of layer. This work aimed to improve the impact property of PLA by blending with
various materials. PLA neat showed the highest impact strength (23.33 kJ/m2
). When 65 wt% CP was
added to the CP/PLA, the impact strength was 14.166 kJ/m2
.

Published

2020-02-28

Issue

Section

Articles