Commercial and military aircraft such as the V-22 Osprey are being constructed using substantial amounts of advanced light-weight composite materials. Impact damage as well as fatigue stress can cause internal delaminations leading to catastrophic part failure without prior visible warning. A reliable health monitor system can enable condition-based maintenance. This can significantly reduce life cycle costs by minimizing inspection time and effort, and by extending the useful life of new and aging aerospace structural components. In this paper we describe a smart structures approach for the detection and assessment of damage in critical composite structures. An array of piezoelectric transducers is attached to the structure for both actuation and sensing. The system actively interrogates the structure with wideband chirp excitation of multiple actuators. Statistical analysis of the changes in the vibration response is used to detect, localize, and assess the severity of damage in the structure. Damage is indicated when the vibration signatures differ from a known baseline condition. Pattern recognition techniques are employed to distinguish damage responses from those due to benign changes such as temperature or loading variations. This model-independent damage detection approach can be applied without extensive algorithm training. Tests were conducted in the fatigue test facility at Bell Helicopter on the V-22 pendulum yoke. Results presented here demonstrate that vibration signature analysis is a viable technique for in-situ damage detection of advanced composite aircraft components

Additive manufacturing can greatly increase a manufacturers efficiency. When using expensive materials like titanium, manufacturers that use 3D printing can save big. Being able to build the component from the bottom up gives manufacturers the unique ability to only use the amount of material that is absolutely necessary. Furthermore, manufacturers can create complex and lightweight components that were not possible with subtractive manufacturing. Having the ability to create complex parts lets manufacturers build a product that would usually consist of multiple parts and turn it into one solid product. Not only can this improve the overall strength of the product, but it requires less time and energy than manufacturing the separate components and then fastening them together. Also, aerospace manufacturers have found that they can produce hollow structures that were not possible with traditional manufacturing techniques. 3D printing uses less material as well as reducing the weight of the overall product. Less weight on an aircraft means less fuel consumed.

XXL is a professional 3D printer with a big building area which uses FFF (Fused Filament Fabrication) technology to realize objects, models and functioning prototypes with the best printing quality on the biggest building volume. Sharebot XXL is a 3D printer dedicated to professional users that combines quality, precision and the biggest printing volume available on the market, 750x250x200 mm. The orizontal development of the printing plate allows to realize big size prototypes in one piece, optimizing the professional workflow. XXL has one extruder and the heated printing plate: it’s optimized to print different materials dedicated to professional applications. Printing process management is easy, intuitive and it can be used in different professional workflow. Thanks to the LCD screen, once the SD card is inserted, the user can manage the entire process and all the setting inside the slicing software. The control knob gives access to the printer menu (both before and during the printing process).

Present the audience to the Additive Manufactured standardized process by ISO ASTM TC261 / F42 Joint Committee. Present what is Additive Manufacturing and its difference against 3d printing. Additive Manufacturing History and main milestones together with a Personal Journey in the technology, Additive manufacturing process as described in ASTM ISO 52900 and ASTM ISO 17296 : vat photo polymerization : VPP , sheet lamination : SHL, material jetting : MJT, material extrusion : MEX, directed energy deposition: DED, binder jetting : BJT, powder bed fusion : PBF . Qualification and Characterization Standards for a Additive Manufacturing based on ASTM ISO 17296, including quality control , performance and specifications for test methods and materials control. Market differentiation by processes, materials and manufacturers accordingly with public studies from 3dhubs and AMPOWER. Presenter is Member of ASTM F42 Member number 2066434 / ABNT CB026 and CEE261 Member number 578499 and ISO TC261 HOD Brazil for both 2019 TC261 International Meetings (Auburn, USA and Senlis, France)

On-demand and distributed manufacturing of spare parts is considered in the Additive Manufacturing industry as one of the largest potential industrial application. Spare parts are critical for equipment repairs, however with the traditional centralized production model, it is impossible to always have the right spares, at the right place, at the right time. This is especially true for long tails or old spare parts, for which keeping inventory doesn’t make sense due to too low demands and prolonged stay in inventory. Additionally, supplying this parts from the OEM or distributors happen to be costly and to take long lead time. On that postulate, the advantage of AM is clear, but to make it actually happen? Which parts can be produced by Additive Manufacturing? How to build the business cases? How to scale-up a “transfer to AM” process over hundred thousand of spares? Won’t the engineering investment to transfer an SKU to AM kill the business case considering the high-mix/low volumes characteristics of long tails? All that questions will be addressed by Paul Guillaumot, CEO of Spare Parts 3D, company specialized in providing solutions to the aftermarket sector for producing on-demand and locally spare parts thanks to the use of AM.

There is a need to recapitulate the native complexity of bone structure within engineered 3D structures with tailored biological and mechanical properties. In this study, we suggest an innovative cell-printing process, supplemented with core/shell nozzle and co-cultured/mono-cultured methods, to achieve 3D osteon-like structures through cell-laden bioinks using an extrusion-based 3D bioprinter in one-step. In this study, vascularization promoting and osteogenic bioinks were developed based on different concentration of GelMA-alginate hydrogels with the incorporation of hydroxyapatite nanoparticles. These hydrogels were chosen due to their suitable mechanical stability, swelling ratio, and printability. To obtain a core/shell osteon-like structure (CSBP), we used a vascularization bioink combined HUVECs in the core region, and used osteogenic- MC3T3-E1 cells-laden bioinks in the shell region. Pure gelatin was concentration in all bioinks to support both of core and shell structures during 3D bioprinting. Core-co-cultured osteon-like structure (CCBP) was fabricated through co-culturing of HUVECs and MC3T3 cells within bioink in the core region. Mono-cultured printed structure composed of single cell lines served as a control. The fabricated 3D-core-cocultured of HUVECs-MC3T3 cells showed significantly higher cell viability (84%) compared to that (78%) of a 3D-core/shell of HUVECs/MC3T3 cells. Both fabricated structures exhibited outstanding cell viability in comparison with (65%) of mono-cultured 3D cell-laden scaffold (control). In addition, significant increases in osteogenic properties were observed in the co-culture samples versus the mono-culture controls. We demonstrated that both co-culture configurations were able to promote mineral deposition in the absence of exogenous osteogenic factors. Although the CSBP configuration displayed less viability than CCBP, this structure still exhibited good osteogenic and angiogenic properties. In conclusion, this investigation provided highlighted the potential of both structures as biomimetic bone scaffolds for complex bone tissue and other tissue engineering application.

The following research are focused in take an old router machine and adapt it for ceramic materials additive manufacturing. The lining of it is improve the small or medium industry that by any reason can’t get new high-end capabilities machinery but has old machinery that can be improved or repowered adding some other manufacturing technologies. Following this idea, the laboratory has a parallel CNC router built in 2006 with an unsupported hardware (too old) and software with limited capabilities, the followed document show how is made the 3d ceramic printing capabilities repowered to this machine under single minutes exchange die (SMED) paradigm. Also, will show the software adjustment made and the following calibration of all the variables concerned at this investigation. This development can also be use in the petrochemistry industry to make ceramic pellets that can be used to oil refinement.

The article introduces the additive manufacturing of components made of high-performance ceramics, especially of silicon carbide, silicon nitride, aluminium oxide and zirconium oxide. The entire process chain from material composition over filament manufacturing, 3D-print and further processing to the ready to use ceramics component was subject of the investigations. The work focussed on the development and processing of ceramics filaments. They can be processed on different 3D-print systems. This development was tested on an extruder system with an installation space volume of 200x200x250 mm³. The feedstock has to be suitable to be turned into a printable filament by means of a 1-screw extruder for which a sufficient flexibility for winding and a minimal tensile strength are necessary. The flexibility was characterised by a minimal bending radius at which the filament does not break yet. The material development included the harmonisation of the organic components in terms of composition and amount of the ceramic powder. Filaments with diameters of 1.75 and 2.85 mm were provided. A steady material discharge is necessary in order to process the two very different source materials (ceramics and plastic) by means of the FDM-procedure. This requires the homogeneous heating of the filament. The homogeneity directly affects the achievable component quality. Result is a material-adjusted viscosity-temperature controlled process for the processing of the ceramic filaments. First applications which were investigated and successfully realised with the new process chain are shown.