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Open AccessArticle

Acoustic Emissions in 3D Printed Parts under Mode I Delamination Test

Dipartimento di Meccanica, Matematica e Management (DMMM), Politecnico di Bari, Viale Japigia 182, 70126 Bari, Italy
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Materials 2018, 11(9), 1760; https://doi.org/10.3390/ma11091760
Received: 2 August 2018 / Revised: 31 August 2018 / Accepted: 14 September 2018 / Published: 18 September 2018
This paper applies an innovative approach based on the acoustic emission technique to monitor the delamination process of 3D parts. Fused deposition modelling (FDM) is currently one of the most widespread techniques for additive manufacturing of a solid object from a computer model. Fundamentally, this process is based on a layer-by-layer deposition of a fused filament. The FDM technique has evolved to the point where it can now be proposed, not only as a prototyping technique, but also as one applicable to direct manufacturing. Nonetheless, a deeper comprehension of mechanical behavior and its dependence on process parameters must include the determination of material properties as a function of the service load. In this work, the effects of extrusion temperature on inter-layer cohesion are studied using a method employing a double cantilever beam (DCB). The ASTM D5528 standard was used to determine the delamination energy, GI. In addition, the acoustic emission technique was employed to follow the delamination process during testing. Finally, a Charge-Coupled Device (CCD) camera and a calibrated grid was employed to evaluate crack propagation during testing. View Full-Text
Keywords: acoustic emission; double cantilever beam; fused deposition modelling; Mode I fracture mechanics; orthotropic materials acoustic emission; double cantilever beam; fused deposition modelling; Mode I fracture mechanics; orthotropic materials
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Barile, C.; Casavola, C.; Cazzato, A. Acoustic Emissions in 3D Printed Parts under Mode I Delamination Test. Materials 2018, 11, 1760.

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