On the critical technological issues of CFF: enhancing the bearing strength

Silvestri, Alessia Teresa; Papa, Ilaria; Rubino, Felice; Squillace, Antonino

doi:10.1080/10426914.2021.1954195

Cited by 18 publications

(12 citation statements)

References 31 publications

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“…The nominal probe characteristic is shown in Table 2. The frequency probe (f = 5 MHz) was selected to optimize the acquisition and reduce signal attenuation in composite material as previously used in previous studies [57].…”

Section: Ultrasonic Investigationsmentioning

confidence: 99%

Experimental integrated approach for mechanical characteristic optimization of FDM-printed PLA in an energy-saving perspective

Napolitano

Cozzolino

Papa

et al. 2022

Int J Adv Manuf Technol

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This experimental study investigates the effects of process parameters for 3D printing polylactic acid (PLA) samples on both the mechanical properties obtained and the energy consumption in the fused deposition modelling (FDM) process. The explained experimental activities provide an in-depth evaluation of all the strategies adopted in different temperatures and scan speed strategies. The results, extracted in tensile strength, ultrasonic inspection (UT), and specific energy consumption (SEC), highlight the printing parameters that mainly affect the mechanical characteristics of the final workpieces and the energy consumption to find an appropriate energy-saving energy strategy for the PLA additive manufacturing process. The results indicate a more excellent uniformity of the molded material, reducing the printing time and total energy consumption at high speeds (V = 110 mm/s) and one level of temperature (T = 215 °C). A new efficiency index has been introduced to release guidelines to pursue the best setup compromise.

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Section: Ultrasonic Investigationsmentioning

confidence: 99%

Experimental integrated approach for mechanical characteristic optimization of FDM-printed PLA in an energy-saving perspective

Napolitano

Cozzolino

Papa

et al. 2022

Int J Adv Manuf Technol

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“…Ascione et al proposed a bearing strength prediction model for glass fibre reinforced composite [23]. Comparing bearing resistance of CRFC produced with additive manufacturing respect to conventional technique it was found that best results are achieved with AM if the hole is produced subsequently by drilling process [24,25]. The reason can be ascribed to the technological limitations of the AM process: to create a hole by an additive approach the so-called wall layers circumscribing the hole itself are mandatory.…”

Section: Introductionmentioning

confidence: 99%

Pin-bearing mechanical behaviour of continuous reinforced Kevlar fibre composite fabricated via fused filament fabrication

2022

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In this study, the pin bearing behaviour of a 3D printed composite material with Kevlar reinforcement was analysed. Three different experimental tests were designed to determine the effects of fibre orientation, layer design, and fibre distribution along the specimen thickness. Furthermore, the pin-bearing strength and stiffness were analysed using statistical methods as analysis of variance. The results indicate a significant increase in bearing strength and stiffness for at least two fibre orientations, i.e. 0°and 90° with respect to the pin displacement. The results also highlight a no significant variation of strength and stiffness for parts produced adopting a mixed or single fibre orientation; finally, the findings do not indicate any significant influence of the fibre layer position inside the specimen, i.e. this parameter does not limit the freedom when designing a fibre-reinforced part.

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“…In particular, additive manufacturing is currently proving its ability to revolutionize the manufacturing industry, considering that it is based on the increment of material, in contrast to the traditional subtractive processes [10]. Additive manufacturing, both for polymers or composites [11,12] and for metals, is characterized by various advantages, such as for example rapid prototyping, high design flexibility, and the possibility to reduce the time to market.…”

Section: Introductionmentioning

confidence: 99%

Exploring Potentialities of Direct Laser Deposition: Thin-Walled Structures

Silvestri

Perini

Bosetti

et al. 2022

KEM

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In the context of Industry 4.0, the interest towards the additive manufacturing processes is growing due to their numerous advantages, such as the possibility to prototype, the reduction of waste material, the inferior time to market, ad so on. In particular, a promising technology is the Direct Laser Deposition, which uses a focused laser beam to melt powders as there are deposited. In opposition to the well-established powder-bed fusion technologies, there are still some issues related to this process. This work aims to solve one of them, exploring the potentialities of DLD in printing thin-wall structures. For this purpose, the influence of the adopted deposition strategy and of the layer thickness on the geometrical accuracy and mechanical properties has been investigated. The results have pointed out that the first variable strongly influences the workpiece. It is possible to deposit thin-wall structures with a ZigZag strategy and consider a layer thickness equal to 90% of the height of the single track, printed with the same process parameters.

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On the critical technological issues of CFF: enhancing the bearing strength

Cited by 18 publications

References 31 publications

Experimental integrated approach for mechanical characteristic optimization of FDM-printed PLA in an energy-saving perspective

Experimental integrated approach for mechanical characteristic optimization of FDM-printed PLA in an energy-saving perspective

Pin-bearing mechanical behaviour of continuous reinforced Kevlar fibre composite fabricated via fused filament fabrication

Exploring Potentialities of Direct Laser Deposition: Thin-Walled Structures

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