Low-cycle fatigue behavior of 3d-printed PLA-based porous scaffolds

Сенатов, Ф.С.; Niaza, K.V.; Stepashkin, Andrey A.; Kaloshkin, S.D.

doi:10.1016/j.compositesb.2016.04.067

Cited by 140 publications

(74 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, it can be assessed that the type of break was the same in all of them. The propagation of the cracks as a combination of bending and shear stress defined the failure mode of this type of material, as has already been discussed by other authors [63]. Figure 6 shows the comparison between the two infill patterns for all the experiments.…”

Section: Fractographysupporting

confidence: 55%

Fatigue Performance of ABS Specimens Obtained by Fused Filament Fabrication

Domingo-Espin¹,

Travieso-Rodríguez²,

Jerez-Mesa³

et al. 2018

Preprint

View full text Add to dashboard Cite

In this paper, the fatigue response of Fused Filament Fabrication (FFF) Acrylonitrile butadiene styrene (ABS) parts is studied. Different building parameters (layer height, nozzle diameter, infill density, and printing speed) were chosen to study their influence on the lifespan of cylindrical specimens according to a design of experiments (DOE) using the Taguchi methodology. The same DOE was applied on two different specimen sets using two different infill patterns: rectilinear and honeycomb. The results show that infill density is the most important parameter for both studied patterns. The specimens manufactured with the honeycomb pattern show longer lifespans. The best parameter set associated to that infill was chosen for a second experimental phase, in which the specimens were tested under different maximum bending stresses to construct the Wöhler curve associated to this 3D printing configuration. The results of this study are useful to design and manufacture ABS end-use parts that are expected to work under oscillating periodic loads.

show abstract

Section: Fractographysupporting

confidence: 55%

Fatigue Performance of ABS Specimens Obtained by Fused Filament Fabrication

Domingo-Espin¹,

Travieso-Rodríguez²,

Jerez-Mesa³

et al. 2018

Preprint

View full text Add to dashboard Cite

show abstract

“…Crack propagation as a combination of bending and shear stress defines the failure mode of this kind of specimens, as was already discussed by other authors [37].…”

Section: Accepted Manuscriptmentioning

confidence: 52%

Fatigue performance of fused filament fabrication PLA specimens

et al. 2018

View full text Add to dashboard Cite

This paper aims to analyze the fatigue response of PLA parts manufactured through fused filament fabrication (FFF). The influence of four factors (layer height, fill density, nozzle diameter and velocity) on the fatigue performance of cylindrical specimens is studied through an L27 Taguchi experimental design. This design is run for two different infills: linear and honeycomb. Specimens have been tested on a rotating fatigue bending machine. The optimal set of parameters and levels resulting in the highest number of cycles to failure have been determined, and implemented to manufacture a second set of specimens, which have been tested at different stress levels to represent the Wöhler curve. Fill density proves to be the most influential parameter on fatigue life, followed by layer height. The tests undertaken to represent the Wöhler curve revealed that 35.8 MPa can be considered as a lower threshold of the endurance limit for this kind of specimens. This value can be useful to use these devices to manufacture human implants, as PLA is a biocompatible material. The main novelty of this paper is that no previous fatigue life assessment of PLA parts manufactured through FFF has been developed.

show abstract

“…Having a structure that resembles the natural design and composition may not always respond to functional requirements of a medical application. Bioresorbable scaffolds to replace bone defects must have a high porosity-a pore size of 50-800 μm-to allow the infiltration of cells and nutrients into the implant [21]; the porosity of the material should accommodate new osteon growth, requiring 200 μm pore size, to allow growth of new capillaries, optimal for 50 μm pore size, whereas interconnected micropores lower than 10 μm improve the metabolic environment and fluid circulation through capillarity [22]. The apparent conflicting requirements are met with a 3D design that does not correspond to the natural structure of the bone.…”

Section: Introductionmentioning

confidence: 99%

“…Also, the scaffold's architecture defines the final form of the new organ. Biocompatibility of scaffolds made by 3D printing, as well as different aspects of their interaction with cells, has been explored in numerous studies by in vitro and in vivo tests [21].…”

Section: Introductionmentioning

confidence: 99%

Innovative Hybrid Materials with Improved Tensile Strength Obtained by 3D Printing

Piticescu¹,

Cursaru²,

Negroiu³

et al. 2020

Biomaterials

View full text Add to dashboard Cite

Barium titanate (BT) and barium strontium titanate (BST) are one of the most studied ferroelectric materials with excellent piezoelectric properties, which can be used to stimulate bone formation by applying an electrical field. It is known that this ceramic is biocompatible and can be used for medical applications. New hybrid materials based on BT and collagen and BST and collagen, with potential applications in bone reconstruction, are presented, emphasizing the potential of fabricating 3D structures by integrating hydrothermal synthesis with additive manufacturing. Designing such structures may take advantage of rheological characterization at single-molecule level for some elastic biopolymers like titin and collagen and their molecular dissection into structural motifs that independently contribute to the protein viscoelasticity. Atomic force spectroscopy measurements on synthetic polypeptides showed that a polypeptide chain containing Ig domain modules is protected against rupture at high stretch by Ig domain unfolding, an important mechanism for stress relaxation in titin molecules. This property may be exploited to enhance the tensile strength of a 3D structure by adding specific synthetic polypeptides to the composition of the printing paste.

show abstract

Low-cycle fatigue behavior of 3d-printed PLA-based porous scaffolds

Cited by 140 publications

References 39 publications

Fatigue Performance of ABS Specimens Obtained by Fused Filament Fabrication

Fatigue Performance of ABS Specimens Obtained by Fused Filament Fabrication

Fatigue performance of fused filament fabrication PLA specimens

Innovative Hybrid Materials with Improved Tensile Strength Obtained by 3D Printing

Contact Info

Product

Resources

About