Abstract:
Three dimensional printing (3DP) facilitates most innovative techniques to manufacture
the complex geometry components. The parametric significance for mechanical strength
of three dimensional printed polymers, such as polylactic acid (PLA), is of great concern
since fused deposition modelling (FDM) being a layered manufacturing process. In this
study, the simultaneous impact of process parameters, e.g. raster angle, unit cell size
and extrusion width on compressive behavior of rapid prototyped PLA samples was
investigated. In biomedical engineering field, 3D printed scaffolds are vastly used as
supporting structures for cellular interactions which help in the development and growth
of new tissues replacing the damaged tissues in the body. Gyroid structures are most
widely used for bone tissue implants for their resemblance to the extracellular matrix
(ECM) structures of the bone tissues. The compressive strength and Young’s modulus
increased as the level of input values for raster angle and extrusion width increased.
Taguchi design of experiment (DOE) L9 array is used for performing the experiments
with three different process parameters having three level of input values. To determine
the significance of different process parameters, linear regression analysis is carried out
and the results are presented using the S/N ratio "Larger is Better" approach.
