With the help of experimental testing and finite element analysis (FEA), this study conducts an in-depth investigation into the mechanical action of thermoplastic polyurethane (TPU) and polylactic acid (PLA) that have been created using 3D printing technology. In order to characterize their behavior under a variety of infill densities and patterns, tests of uniaxial tensile and cyclic compression were carried out. PLA revealed stronger stiffness and yield strength, making it excellent for rigid prototypes, but TPU demonstrated superior elasticity and energy dissipation, making it suited for flexible applications. Furthermore, TPU was shown to be suitable for flexible applications.
For the purpose of developing predictive models for the mechanical qualities, the research combined statistical analysis through the use of Response Surface Methodology (RSM). This made it possible to optimize the printing parameters. The capacity of finite element analysis (FEA) simulations to accurately replicate experimental results by utilizing proper hyperelastic models is evidence that these simulations are capable of capturing the complicated material response. The purpose of this effort is to build a reliable system for evaluating and improving the mechanical performance of 3D-printed materials. This methodology will provide useful insights for the design of these materials and their application in a variety of engineering branches.