Lorenzo Bergonzi

MaCh3D · R&D

The recycling of materials and the efficient use of resources is nowadays fundamental in a circular economy perspective. This concept also applies to Additive Manufacturing (AM) where waste can be reused to produce new material. Using mostly thermoplastic polymers, Fused Deposition Modeling (FDM) is an AM technique which allows to melt waste materi...

This work deals with the experimental validation of the proposed specimens geometries which design process through Finite Element Method was presented during AIAS 2019 and published afterwards [1]. In particular, non-conventional miniaturized specimen geometry compliant to ASTM E8 and ISO 6892, specifically developed to work with MaCh3D [2], an inn...

Fused Deposition Modelling (FDM) is one of the most widespread additive manufacturing technologies due to its relatively low cost and simplicity. Usually, printed parts have an internal structure (infill) that is not produced with 100% material density. This strategy is adopted to save material and time thanks also to the fact that when a component...

Adhesive bonding can disclose the possibility to additively manufacture (AM) smaller, highly optimized objects to be bonded in post-production into/onto larger components. However, the infill shape and percentage can influence the fracture toughness of a bonded joint as it emerges from the literature Since the choice of the infill yields also a sig...

Mechanical characteristics of the produced materials through additive manufacturing (AM) are influenced by a multitude of parameters. In particular, Free Filament Fabrication (FFF) is one of the most adopted technologies due to low machine cost and its simplicity. In recent years, a lot of printer manufacturers emerged as well as many printer contr...

The production of 3D printed safety protection devices (SPD) requires particular attention to the material selection and to the evaluation of mechanical resistance, biological safety and surface roughness related to the accumulation of bacteria and viruses. We explored the possibility to adopt additive manufacturing technologies for the production...

This work explores the influence of Additive Manufacturing (AM) parameters on the Mode I fracture toughness of polymer bonded joints. The motivation is that realizing AM parts to be later assembled can be convenient from the manufacturing standpoint and adhesive bonding avoids distortion and material modification due to heat while welding or the us...

This work emphasizes the critical need of surface preparation to improve the performance of adhesively bonded 3D printed Acrylonitrile Butadiene Styrene (ABS) adherends obtained using Fused Filament Fabrication (FFF). In particular, mechanical abrasion and two different plasma pre-treatments, i.e., Atmospheric Pressure Plasma (APP) and Low-Pressure...

The work illustrates how building parameters of the Additive Manufacturing process Fused Filament Fabrication can affect not only the mechanical properties but also the surface wettability and morphology. Wettability and morphology are relevant factors in bonded joints performance. Advantages of polymeric additive manufacturing are to allow a redes...

The aim of this work is to describe the design process of a non-conventional miniaturized specimen geometry compliant to ASTM E8M and ISO 6892, expressively developed to work with MaCh3D, an innovative miniaturized tensile testing machine. The use additive manufacturing in a production perspective requires continuous certification of the fabricated...

Material testing is a fundamental activity for the characterization of materials mechanical properties and for the certification of product quality. With concepts such as Smart Factories and Industry 4.0 coming to the fore, testing and measurement is moving away from laboratories and closer to the production floor: MaCh 3D is a miniaturized tensile...

Il material testing è un'attività fondamentale per la caratterizzazione delle proprietà meccaniche dei materiali e per la certificazione della qualità dei prodotti. Con l'avvento dell'Industria 4.0 e delle Smart Factories l'attività di qualifica materiali sta spostandosi dai laboratori alle linee di produzione: MaCh 3D è una macchina di prova minia...