Investigation of mechanical properties of products produced from pla materials by additional manufacturing method

In this thesis, production was made from PLA filament material with additive manufacturing method according to different parameters. Produced samples were subjected to hardness test and tensile tests and mechanical properties of the products were examined. In production parameters, as the first parameter; three different occupancy rates, 20%, 60% and 100%, were used. As the second parameter; three different fill patterns were used: Line, Grid and Concentric. As the third parameter; three different production speeds were used: 20 mm/sec, 40 mm sec and 60 mm/sec. All in all, it was tried to determine the fill rate, fill pattern and production speed values required to obtain the product with the best mechanical properties. According to the test results; the tensile strength of the samples increased with the increase in the fill rate. The change in fill pattern and production speed did not cause a significant change in tensile strength. The increase in the occupancy rate and the decrease in the production speeds caused a decrease in the strain values. It was observed that the increase in fill rate and decrease in production speed generally caused an increase in hardness values. It was concluded that the change in strain and hardness values were due to the brittleness of PLA material due to more heat exposure in the process of obtaining the product. Filling pattern parameters did not cause a significant change in all tests. The test results are presented in comparative graphs in the text.