Determination of the Elasticity Modulus of 3D-Printed Octet-Truss Structures for Use in Porous Prosthesis Implants

In tissue engineering, scaffolds can be obtained by means of 3D printing. Different structures are used in order to reduce the stiffness of the solid material. The present article analyzes the mechanical behavior of octet-truss microstructures. Three different octet structures with strut radii of 0.4, 0.5, and 0.6 mm were studied. The theoretical relative densities corresponding to these structures were 34.7%, 48.3%, and 61.8%, respectively. Two different values for the ratio of height (H) to width (W) were considered, H/W = 2 and H/W = 4. Several specimens of each structure were printed, which had the shape of a square base prism. Compression tests were performed and the elasticity modulus (E) of the octet-truss lattice-structured material was determined, both, experimentally and by means of Finite Element Methods (FEM). The greater the strut radius, the higher the modulus of elasticity and the compressive strength. Better agreement was found between the experimental and the simulated modulus of elasticity results for H/W = 4 than for H/W = 2. The octet-truss lattice can be considered to be a promising structure for printing in the field of tissue engineering.

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Fabrication of scalable and structured tissue engineering scaffolds using water dissolvable sacrificial 3D printed moulds

Materials Science and Engineering C ◽

10.1016/j.msec.2015.06.002 ◽

2015 ◽

Vol 55 ◽

pp. 569-578 ◽

Cited By ~ 98

Author(s):

Soumyaranjan Mohanty ◽

Layla Bashir Larsen ◽

Jon Trifol ◽

Peter Szabo ◽

Harsha Vardhan Reddy Burri ◽

...

Keyword(s):

Tissue Engineering ◽

Tissue Engineering Scaffolds ◽

3D Printed

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Numerical analysis of mechanical properties of 3D printed aluminium components with variable core infill values

Journal of Achievements of Materials and Manufacturing Engineering ◽

10.5604/01.3001.0014.6912 ◽

2020 ◽

Vol 1 (103) ◽

pp. 16-24

Author(s):

P. Baras ◽

J. Sawicki

Keyword(s):

Numerical Analysis ◽

Mechanical Strength ◽

Reference Model ◽

Reaction Force ◽

Solid Material ◽

Solid Core ◽

Compression Tests ◽

Element Analysis ◽

Static Compression ◽

3D Printed

Purpose: The purpose of this paper is to present numerical modelling results for 3D-printed aluminium components with different variable core infill values. Information published in this paper will guide engineers when designing the components with core infill regions. Design/methodology/approach: During this study 3 different core types (Gyroid, Schwarz P and Schwarz D) and different combinations of their parameters were examined numerically, using FEM by means of the software ANSYS Workbench 2019 R2. Influence of core type as well as its parameters on 3D printed components strength was studied. The “best” core type with the “best” combination of parameters was chosen. Findings: Results obtained from the numerical static compression tests distinctly showed that component strength is highly influenced by the type infill choice selected. Specifically, infill parameters and the coefficient (force reaction/volumetric percentage solid material) were investigated. Resulting total reaction force and percentage of solid material in the component were compared to the fully solid reference model. Research limitations/implications: Based on the Finite Element Analysis carried out in this work, it was found that results highlighted the optimal infill condition defined as the lowest amount of material theoretically used, whilst assuring sufficient mechanical strength. The best results were obtained by Schwarz D core type samples. Practical implications: In the case of the aviation or automotive industry, very high strength of manufactured elements along with a simultaneous reduction of their wight is extremely important. As the viability of additively manufactured parts continues to increase, traditionally manufactured components are continually being replaced with 3D-printed components. The parts produced by additive manufacturing do not have the solid core, they are rather filled with specific geometrical patterns. The reason of such operation is to save the material and, in this way, also weight. Originality/value: The conducted numerical analysis allowed to determine the most favourable parameters for optimal core infill configurations for aluminium 3D printed parts, taking into account the lowest amount of material theoretically used, whilst assuring sufficient mechanical strength.

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3D Printed porous tissue engineering scaffolds with the self-folding ability and controlled release of growth factor

MRS Communications ◽

10.1557/mrc.2020.65 ◽

2020 ◽

Vol 10 (4) ◽

pp. 579-586

Author(s):

Jiahui Lai ◽

Junzhi Li ◽

Min Wang

Keyword(s):

Tissue Engineering ◽

Controlled Release ◽

Growth Factor ◽

The Self ◽

Tissue Engineering Scaffolds ◽

3D Printed

Abstract

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Fiber engraving for bioink bioprinting within 3D printed tissue engineering scaffolds

Bioprinting ◽

10.1016/j.bprint.2020.e00076 ◽

2020 ◽

Vol 18 ◽

pp. e00076 ◽

Cited By ~ 1

Author(s):

Luis Diaz-Gomez ◽

Maryam E. Elizondo ◽

Gerry L. Koons ◽

Mani Diba ◽

Letitia K. Chim ◽

...

Keyword(s):

Tissue Engineering ◽

Tissue Engineering Scaffolds ◽

3D Printed

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The Fabrication of Tissue Engineering Scaffolds by Inkjet Printing Technology

Materials Science Forum ◽

10.4028/www.scientific.net/msf.934.129 ◽

2018 ◽

Vol 934 ◽

pp. 129-133 ◽

Cited By ~ 1

Author(s):

Chao Fan Lv ◽

Li Ya Zhu ◽

Jian Ping Shi ◽

Zong An Li ◽

Wen Lai Tang ◽

...

Keyword(s):

Tissue Engineering ◽

Sodium Alginate ◽

Inkjet Printing ◽

Three Dimensional ◽

3D Bioprinting ◽

Tissue Engineering Scaffolds ◽

Printing Technology ◽

3D Printed ◽

Inkjet Printing Technology ◽

Alginate Scaffold

Three-dimensional (3D) printing has been playing an important role in diverse areas in medicine. In order to promote the development of tissue engineering, this study attempts to fabricate tissue engineering scaffolds using the inkjet printing technology. Sodium alginate, exhibiting similar properties to the native human extracellular matrix (ECM), was used as bioink. The jetted fluid of sodium alginate would be gelatinized when printed into the calcium chloride solution. The characteristics of the 3D-printed sodium alginate scaffold were systematically measured and analyzed. The results show that, the pore size, porosity and degradation property of these scaffolds could be well controlled. This study indicates the capability of 3D bioprinting technology for preparing tissue engineering scaffolds.

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