Metodi di misura senza contatto per la valutazione di difetti in componenti prodotti con processi additivi

Additive Manufacturing (AM) has significantly transformed a multitude of industries, offering unparalleled design flexibility and cost-effectiveness when it comes to producing highly complex parts or the possibility of customized production, while also minimizing material waste. However, the absence of standardized quality control processes presents a significant challenge for further expansion of Additive Manufacturing. This research explores the multifaceted aspect of quality control in additive manufacturing, with a focus on the challenges of using non-destructive techniques to inspect components produced with Fused Deposition Modeling (FDM) processes. With the aim of being able to offer a contribution, the research aims to test the shearography technique, examining its limits and evaluating its suitability for use on 3D printed components. The study conducts the inspection of a specially designed polymer tester with integrated defects common in the FDM manufacturing process where shearography will be employed not only as a qualitative methodology, but more importantly as a quantitative approach, with the use of tomography as reference for measurements. In addition, a procedure is proposed that exploits the shearography hardware, also to acquire images during tensile tests carried out on specimens containing defects and then use 2D digital image correlation, to obtain deformation maps. The integration of both techniques allows you to identify defects and analyze their deformation evolution up to the breaking point. This approach not only serves as a defect detection tool but is also a verification and validation method.