Abstract
Two 3D printed materials (Polylactic Acid and Carbon fiber) with variable printing density have been investigated due to their practical uses in the engineering utilization. The effect of printing density composites was studied by the tensile test. The used materials stress-strain curves were analyzed to find modulus of elasticity and ultimate tensile strength of the mentioned materials. The results manifested that the carbon fiber has the highest strength-weight ratio. On the other hand, the carbon fiber showed more ductility than the Polylactic Acid. The results of this paper will be aiding the researchers or engineering students to decide which material is suitable for 3D printing applications.
Highlights
3D printing is a rapid manufacturing technique by which various materials can be printed utilizing an additional process, where successive layers of materials are laid down in different shapes [2], This revolutionary method for creating 3D models with the use an inkjet technology saves time and cost by eliminating the need to design, print and glue together a separate model part Fused deposition modeling (FDM) is an additional manufacturing technology commonly used for making models, prototypes, and manufacturing parts
It is considered one of the methods for achieving 3D printing FDM works on an “additive” principle by laying down material in layers; a plastic filament or metal wire is unwound from a coil and supplies material to produce a part
When the density of printing decreases, a change in values occurs, and the values of the modules of elasticity for carbon fiber are greater than Polylactic Acid filaments (PLA)
Summary
2. Materials Two types of materials, Polylactic Acid, and Carbon fiber filaments were used to print the specimens, which are utilized in this work. The diameter of the Polylactic Acid filaments (PLA) (Figure 1) used in the 3D printer was 1.75 mm, its specific weight = 3 g/m, and the printing temperature was 200-240°C.
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