THE INFLUENCE OF INFILL DENSITY AND SPEED OF PRINTING ON THE TENSILE PROPERTIES OF THE THREE DIMENSION PRINTING POLYLACTIC ACID PARTS

Abstract

The primary aim of this research was to determine effect of infill-density (ID), and the speed of print on the microstructure and tensile behavior of 3D printed elements by conducting the tensile test. The tensile behavior of 3D printed elements is essentially dependent on the ID that is stratified through printing. Here specimens printed from PLA and divided into three group the first group printed at speed of 40mm/s and (50,75,100) % infill ratio. And second group printed at speed of 50 mm/s and (50,75,100) % infill ratio. The third group printed at speed of 60mm/min and (50,75,100) % infill ratio. The specimens printed in accordance with ASTM D638 of tensile test. From all specimens the best result obtained at first group specimen 3 at infill ratio of 100% and speed of print 40mm/min. from the microstructure examination the brittle fracture features (smooth region) and ductile fracture characteristics (deformed patterns) were observed in infill ratio (ID) percentage.