Investigations on modulus of elasticity of aluminium reinforced 3D printed structures

Abstract Composites are the revolutionary materials that were developed for the ease of the technology. Similar to all families of materials, composites are being extensively studied nowadays. One of the composites ‘main studies is the homogenization study to determine composites modulus of elasticity function of multiple variables based on differentiating several inclusions’ geometries, or quantities or orientations. However, homogenization studies require extensive numerical and analytical work. This work uses a statistical optimized tool TSREG (tabu search combined with statistical regression proven to achieve models with the highest R-squared and lowest p-values for each variable in addition to the lowest MAPE (mean absolute percentage error)) to predict a model relating composite modulus of elasticity to inclusions shape (as aspect ratio), volume fraction, and orientation (0-30-60-90°). Experimental data of modulus of elasticity compressed 3D printed ABS plastics cubes of 16 × 16 × 16 mm3 size having one inclusion (as empty spheres or ellipsoids with zero Young’s modulus) were utilized. For the voids, their geometries were varied to cover spherical and elliptical shapes with several aspect ratios (0.2-0.4-0.65-0.75-0.9-1), volume fractions (0-0.1-0.2-0.3-0.35-0.4-0.5-1), and orientations (0-30-60-90°). This model helps researchers to determine the composite modulus of elasticity using one significant and accurate expression without using numerical analysis.

Download Full-text

Comparison of 3D printed trabecular structure with porous plasma spray: A method based on mapping the local modulus of elasticity

Materials Research Express ◽

10.1088/2053-1591/aba147 ◽

2020 ◽

Vol 7 (7) ◽

pp. 075403

Author(s):

Ladislav Cvrček ◽

František Denk ◽

Zdeněk Čejka

Keyword(s):

Plasma Spray ◽

Modulus Of Elasticity ◽

Trabecular Structure ◽

Local Modulus ◽

3D Printed

Download Full-text

Influence of printing direction on 3D printed ABS specimens

Production Engineering Archives ◽

10.30657/pea.2020.26.24 ◽

2020 ◽

Vol 26 (3) ◽

pp. 127-130

Author(s):

Nassim Markiz ◽

Eszter Horváth ◽

Péter Ficzere

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Additive Manufacturing ◽

Ultimate Tensile Strength ◽

Modulus Of Elasticity ◽

Tensile Tests ◽

Standard Test ◽

Complex Objects ◽

3D Printed ◽

Printing Direction

AbstractIn the recent years, additive manufacturing became an interesting topic in many fields due to the ease of manufacturing complex objects. However, it is impossible to determine the mechanical properties of any additive manufacturing parts without testing them. In this work, the mechanical properties with focus on ultimate tensile strength and modulus of elasticity of 3D printed acrylonitrile butadi-ene styrene (ABS) specimens were investigated. The tensile tests were carried using Zwick Z005 loading machine with a capacity of 5KN according to the American Society for Testing and Materials (ASTM) D638 standard test methods for tensile properties of plastics. The aim of this study is to investigate the influence of printing direction on the mechanical properties of the printed specimens. Thus, for each printing direction ( and ), five specimens were printed. Tensile testing of the 3D printed ABS specimens showed that the printing direction made the strongest specimen at an ultimate tensile strength of 22 MPa while at printing direction it showed 12 MPa. No influence on the modulus of elasticity was noticed. The experimental results are presented in the manuscript.

Download Full-text

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

Materials ◽

10.3390/ma11122420 ◽

2018 ◽

Vol 11 (12) ◽

pp. 2420 ◽

Cited By ~ 10

Author(s):

Ali Bagheri ◽

Irene Buj-Corral ◽

Miquel Ferrer ◽

Maria Magdalena Pastor ◽

Francesc Roure

Keyword(s):

Tissue Engineering ◽

Modulus Of Elasticity ◽

Elasticity Modulus ◽

Solid Material ◽

Truss Structures ◽

Compression Tests ◽

Tissue Engineering Scaffolds ◽

Octet Truss ◽

3D Printed

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.

Download Full-text