Inter-layer bonding characterisation between materials with different degrees of stiffness processed by fused filament fabrication

Khudiakova, A.; Arbeiter, Florian; Spoerk, Martin; Wolfahrt, Markus; Godec, Damir; Pinter, Gerald

doi:10.1016/j.addma.2019.05.006

Cited by 18 publications

(12 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Despite the 3D printer ensures the possibility to simultaneously use two materials, with the theoretical possibility to print the whole manipulator in a single-step printing cycle, printing each I-SUPPORT element separately has been preferred, due to the following considerations: (i) to avoid issues related to multi-material printing (for instance cross-contamination or low materials affinity) [26][27][28]; (ii) to minimize both the material usage and printing time; (iii) to reduce waste in case of errors; and (iv) to keep the possibility to replace single elements with spare parts instead of the whole module.…”

Section: Am I-support Manufacturingmentioning

confidence: 99%

I-support soft arm for assistance tasks: a new manufacturing approach based on 3D printing and characterization

et al. 2020

View full text Add to dashboard Cite

Soft robotics is an emerging scientific field well known for being widespread employed in several applications where dexterity and safe interaction are of major importance. In particular, a very challenging scenario in which it is involved concerns bio-medical field. In the last few years, several soft robotic devices have been developed to assist elderly people in daily tasks. In this paper, the authors present a new manufacturing approach for the fabrication of I-SUPPORT, a soft arm used to help needful people during shower activities. The proposed I-SUPPORT version, based on pneumatic and cable-driven actuation, is manufactured using Fused Filament Fabrication (FFF), the most common and inexpensive Additive Manufacturing (AM) technology. The advantages offered by FFF technology compared to traditional manufacturing methods regard: (i) the possibility to increase the automation degree of the process by reducing manual tasks, (ii) the decrease of assembly operations and (iii) an improvement in terms of supply chain. Moreover, the constitutive I-SUPPORT elements have been printed separately to save time, reduce materials and optimize the waste in case of failure. Afterwards, the proposed soft robotic arm has been tested to evaluate the performances and of the chambers, module and the whole I-SUPPORT manipulator.

show abstract

Section: Am I-support Manufacturingmentioning

confidence: 99%

I-support soft arm for assistance tasks: a new manufacturing approach based on 3D printing and characterization

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Concurrently, if the viscosity is high, the filament needs to reveal an improved strength and stiffness to be able to pass through the nozzle . However, high viscosities can be counteracted by increased nozzle temperatures or by implementing additional hardware like an ultrasonic transducer at the nozzle, resulting in an easier dispensability of the melt . For composites, although, highly viscous materials tend to agglomerate, which can result in clogged printing nozzles .…”

Section: Introductionmentioning

confidence: 99%

Material extrusion‐based additive manufacturing of polypropylene: A review on how to improve dimensional inaccuracy and warpage

Spoerk

Holzer

González-Gutiérrez

2019

J of Applied Polymer Sci

178

172

View full text Add to dashboard Cite

Material extrusion-based additive manufacturing (ME-AM) is an emerging processing technique that is characterized by the selective deposition of thermoplastic filaments in a layer-by-layer manner based on digital part models. Recently, it has attracted considerable attention, as this technique offers manifold benefits over conventional manufacturing technologies. However, to meet the challenges of complex industrial applications, certain shortcomings of ME-AM still need to be overcome. A case in point is the limited amount of semicrystalline thermoplastics, which are still not established as reliable, commercial filament materials. Particularly, polypropylene (PP) offers attractive properties that are unique among the ME-AM material portfolio. This review describes the current approaches of fabricating PP components by ME-AM. Both commercial and scientific strategies to make PP 3D-printable are elaborated and compared. As dimensional issues are especially problematic for PP, a comprehensive section of this review focuses on the strategies developed for mitigating warpage for PP parts fabricated by ME-AM.

show abstract

“…The authors also found that the fracture toughness of the FFF samples was lower than that of hot-press molded specimens and the FFF specimens reinforced with short carbon fiber presented lower fracture toughness than neat ABS. Khudiakova et al [ 42 ] experimentally determined the stress intensity factor and the fracture toughness in mode I of FFF net PLA and SCF/PLA specimens with different thickness using both the DCB test and Cracked Round Bar. The fracture toughness of the net polymer was found to be almost twice that of the SCF/PLA.…”

Section: Introductionmentioning

confidence: 99%

Experimental Characterization and Analysis of the In-Plane Elastic Properties and Interlaminar Fracture Toughness of a 3D-Printed Continuous Carbon Fiber-Reinforced Composite

et al. 2022

View full text Add to dashboard Cite

The use of continuous fiber as reinforcement in polymer additive manufacturing technologies enhances the mechanical performance of the manufactured parts. This is the case of the Carbon-Fiber reinforced PolyAmide (CF/PA) used by the MarkForged MarkTwo® 3D printer. However, the information available on the mechanical properties of this material is limited and with large variability. In this work, the in-plane mechanical properties and the interlaminar fracture toughness in modes I and II of Markforged’s CF/PA are experimentally investigated. Two different standard specimens and end-tabs are considered for the in-plane properties. Monolithic CF/PA specimens without any additional reinforcement are used for the interlaminar fracture toughness characterization. Two different mode I specimen configurations are compared, and two different test types are considered for mode II. The results show that prismatic specimens with paper end-tabs are more appropriate for the characterization of the in-plane material properties. The use of thick specimens for mode I fracture toughness tests complicates the characterization and can lead to erroneous results. Contrary to what has been reported in the literature for the same material, fracture toughness in mode I is lower than for mode II, which agrees with the normal tendency of traditional composite materials.

show abstract

Inter-layer bonding characterisation between materials with different degrees of stiffness processed by fused filament fabrication

Cited by 18 publications

References 46 publications

I-support soft arm for assistance tasks: a new manufacturing approach based on 3D printing and characterization

I-support soft arm for assistance tasks: a new manufacturing approach based on 3D printing and characterization

Material extrusion‐based additive manufacturing of polypropylene: A review on how to improve dimensional inaccuracy and warpage

Experimental Characterization and Analysis of the In-Plane Elastic Properties and Interlaminar Fracture Toughness of a 3D-Printed Continuous Carbon Fiber-Reinforced Composite

Contact Info

Product

Resources

About