On the use of laser-scanning vibrometry for mechanical performance evaluation of 3D printed specimens

• Laser-scanning vibrometry successfully discriminated the mechanical behavior of 3D printed specimens produced with different process parameter combinations. Equivalent Elastic Modulus data served to confirm significant influences and interactions between parameters. A model was developed provide elastic modulus values for use in dynamic simulations parts. In this study, we explored suitability laser-scanning (LSV) evaluation rectangular prisms by Fused Filament Fabrication (FFF). Our hypothesis that LSV would be able discriminate fabricated parameters Build orientation, raster angle, nozzle temperature, printing speed layer thickness were interest. Based on a factorial design experiment approach, 48 combinations taken into account 96 polylactic acid (PLA) fabricated. The characterization their dynamical provided frequency data, making possible computation an equivalent metric. Statistical analysis dataset confirmed build orientation temperature. Moreover, multivariate regression models rank, not only individual parameters, but also quadratic cubic them. previous knowledge then applied generate ad hoc selecting most important factors (linear interactions). predicted moduli our used modal both complex part. simulated frequencies thus obtained generally closer experimental ones (?11%), as compared based internal geometry modelling (?33%). appears very promising integrity Other additive manufacturing technologies may benefit from technique adoption presented methodology test, simulate optimize properties products.