scholarly journals Characterization of the Mechanical Properties of FFF Structures and Materials: A Review on the Experimental, Computational and Theoretical Approaches

Materials ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 895 ◽  
Author(s):  
Enrique Cuan-Urquizo ◽  
Eduardo Barocio ◽  
Viridiana Tejada-Ortigoza ◽  
R. Pipes ◽  
Ciro Rodriguez ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Predictive Models ◽  
Computational Models ◽  
Structural Performance ◽  
Experimental Characterization ◽  
Fused Filament Fabrication ◽  
Theoretical Approaches ◽  
Analytical Approximations ◽  
Printed Materials

The increase in accessibility of fused filament fabrication (FFF) machines has inspired the scientific community to work towards the understanding of the structural performance of components fabricated with this technology. Numerous attempts to characterize and to estimate the mechanical properties of structures fabricated with FFF have been reported in the literature. Experimental characterization of printed components has been reported extensively. However, few attempts have been made to predict properties of printed structures with computational models, and a lot less work with analytical approximations. As a result, a thorough review of reported experimental characterization and predictive models is presented with the aim of summarizing applicability and limitations of those approaches. Finally, recommendations on practices for characterizing printed materials are given and areas that deserve further research are proposed.

scholarly journals Experimental characterization of mechanical properties of the cement-aggregate interface in concrete

2018 ◽  
Vol 161 ◽  
pp. 16-25 ◽  
Author(s):  
M. Jebli ◽  
F. Jamin ◽  
E. Malachanne ◽  
E. Garcia-Diaz ◽  
M.S. El Youssoufi
Keyword(s):  
Mechanical Properties ◽  
Experimental Characterization

Experimental characterization of physical and mechanical properties of schist from Portugal

2014 ◽  
Vol 50 ◽  
pp. 617-630 ◽  
Author(s):  
Ricardo S. Barros ◽  
Daniel V. Oliveira ◽  
Humberto Varum ◽  
Carlos A.S. Alves ◽  
Aires Camões
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Experimental Characterization

scholarly journals Experimental characterization of mechanical properties of the cement pasteaggregate interface in concrete

2017 ◽  
Vol 140 ◽  
pp. 12014
Author(s):  
M. Jebli ◽  
F. Jamin ◽  
E. Malachanne ◽  
E. Garcia-Diaz ◽  
M.S. El Youssoufi
Keyword(s):  
Mechanical Properties ◽  
Experimental Characterization

scholarly journals Processing of Sr2+ Containing Poly L-Lactic Acid-Based Hybrid Composites for Additive Manufacturing of Bone Scaffolds

2020 ◽  
Vol 7 ◽  
Author(s):  
Priscila Melo ◽  
Raasti Naseem ◽  
Ilaria Corvaglia ◽  
Giorgia Montalbano ◽  
Carlotta Pontremoli ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Additive Manufacturing ◽  
Hybrid Composites ◽  
Homogeneous Distribution ◽  
Fused Filament Fabrication ◽  
Rheological Characterization ◽  
Biodegradable Composite ◽  
Manufacturing Technologies

Biodegradable composite materials represent one of the major areas of investigation for bone tissue engineering due to their tuneable compositional and mechanical properties, which can potentially mimic those of bone and potentially avoid the removal of implants, mitigating the risks for the patient and reducing the overall clinical costs. In addition, the introduction of additive manufacturing technologies enables a strict control over the final morphological features of the scaffolds. In this scenario, the optimisation of 3D printable resorbable composites, made of biocompatible polymers and osteoinductive inorganic phases, offers the potential to produce a chemically and structurally biomimetic implant, which will resorb over time. The present work focuses on the development and process optimisation of two hybrid composite filaments, to be used as feedstock for the fused filament fabrication 3D printing process. A Poly L-lactic acid matrix was blended with either rod-like nano-hydroxyapatite (nano-HA) or nanoparticles of mesoporous bioactive glasses, both partially substituted with strontium (Sr2+), due to the well-known pro-osteogenic effect of this ion. Both inorganic phases were incorporated into Poly L-lactic acid using an innovative combination of processes, obtaining a homogeneous distribution throughout the polymer whilst preserving their ability to release Sr2+. The filament mechanical properties were not hindered after the incorporation of the inorganic phases, resulting in tensile strengths and moduli within the range of cancellous bone, 50 ± 10 MPa and 3 ± 1 GPa. Finally, the rheological characterization of the hybrid composites indicated a shear thinning behaviour, ideal for the processing with fused filament fabrication, proving the potential of these materials to be processed into 3D structures aiming bone regeneration.

scholarly journals Characterization of Mechanical and Hygroscopic Properties of Individual Canes of Reed

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2193
Author(s):  
Montaña Jiménez-Espada ◽  
Daniel Herrero-Adán ◽  
Rafael González-Escobar
Keyword(s):  
Mechanical Properties ◽  
Moisture Content ◽  
Environmentally Friendly ◽  
Structural Performance ◽  
Structural Requirements ◽  
Cellulose Material ◽  
Hygroscopic Properties ◽  
Strong Candidate ◽  
Strength And Stiffness

The search for sustainability has led to the utilization of more ecological materials with at least, a similar structural performance to those used at present. In this regard, reed fits the environmental and structural requirements as it is a sustainable and biodegradable lignin-cellulose material with remarkable mechanical properties. This research confirms the reed’s structural efficiency as it demonstrates that it has excellent strength and stiffness in relation to its density. The reed anisotropy has a large impact on its properties. Indeed, the strength and stiffness parallel to the fibers are clearly higher than in the perpendicular direction. The results confirm that strength and stiffness decrease with the moisture content and nodes act as reinforcement in compression and bending. If compared with steel, timber and concrete, the reed possesses the highest value for strength. Hence, reed constitutes a strong candidate for environmentally friendly engineering.

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