dc.description.abstract | This paper investigates the manufacturing variants influential on the strength of
3D printed products. In contrast to the traditional manufacturing methods
which produce the final product via removing materials from parts, in 3D
printing technology the products are provided with adding layer by layer
directly from a digital file. 3D printing technology due to overcoming the many
difficulties and limitations of conventional fabrication approaches is a rapidly
progressing technology which takes attention in many industries such as
aerospace, automotive, medical and building industries. This paper aims to
research the variants affecting the mechanical properties of components
produced by 3D printing technologies. To reach this aim a comprehensive review
was conducted to determine the various process and geometric parameters in
3D printing technologies. The conducted literature survey results indicate that
besides the filament material, the nozzle speed and diameter, layer thickness,
filament diameter, printing raster angle, printing pattern, temperature and infill
density are parameters which influence the final product quality and mechanical
properties in term of ultimate tensile strength, yield stress and elasticity
modulus. It is concluded that 3D printing filament materials strength has direct
affect on the strength of final product. By providing the adequate thermal
behavior of the system, the cohesion between layers can be improved.
Extrusion speed affects surface roughness and quality of the produced
components. Nozzle diameter has a significant influence on interlayer cohesion.
The honeycomb pattern due to facilitating the load transfer between layers
provides higher mechanical strength. Findings of this study will guide the
researchers and manufacturers to select appropriate printing parameters to
produce component with optimum mechanical properties. | en_US |