scholarly journals Functionally graded porous scaffolds in multiple patterns: New design method, physical and mechanical properties

2018 ◽  
Vol 160 ◽  
pp. 849-860 ◽  
Author(s):  
Fei Liu ◽  
Zhongfa Mao ◽  
Peng Zhang ◽  
David Z. Zhang ◽  
Junjie Jiang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Design Method ◽  
Physical And Mechanical Properties ◽  
Functionally Graded ◽  
Porous Scaffolds

scholarly journals Design and Characterization of Sheet-Based Gyroid Porous Structures with Bioinspired Functional Gradients

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3844
Author(s):  
Yuan Jin ◽  
Haoyu Kong ◽  
Xueyong Zhou ◽  
Guangyong Li ◽  
Jianke Du
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Biomechanical Properties ◽  
Potential Method ◽  
Structural Features ◽  
Design Parameters ◽  
Porous Scaffolds ◽  
Porous Structures ◽  
Compression Tests ◽  
Graded Structures

A new type of sheet porous structures with functionally gradients based on triply periodic minimal surfaces (TPMS) is proposed for designing bone scaffolds. The graded structures were generated by constructing branched features with different number of sheets. The design of the structure was formulated mathematically and five types of porous structure with different structural features were used for investigation. The relative density (RD) and surface area to volume (SA/V) ratio of the samples were analyzed using a slice-based approach to confirm their relationships with design parameters. All samples were additively manufactured using selective laser melting (SLM), and their physical morphologies were observed and compared with the designed models. Compression tests were adopted to study the mechanical properties of the proposed structure from the obtained stress–strain curves. The results reveal that the proposed branched-sheet structures could enhance and diversify the physical and mechanical properties, indicating that it is a potential method to tune the biomechanical properties of porous scaffolds for bone tissue engineering (TE).

Design and Processing of FGCM Materials for Applications Subjected to Intensive Abrasive Wear

2017 ◽  
Vol 750 ◽  
pp. 137-141
Author(s):  
Ion Badoi ◽  
Dan Mihai Constantinescu ◽  
Daniel Vlasceanu
Keyword(s):  
Mechanical Properties ◽  
High Speed ◽  
Physical And Mechanical Properties ◽  
Functionally Graded ◽  
Cold Extrusion ◽  
Technological Parameters ◽  
Wear Properties ◽  
Graded Materials ◽  
Low Alloyed Steel ◽  
Sic Reinforcement

The present work shows the design criteria of FGCM, respectively selection criteria of PM (Powder Metallurgy) matrix, and use of reinforcement particles in correlation with the mechanical stresses resulting in moulds and punches used for steel cold extrusion, powder compaction, sheet metal stamping and series production of parts processed with these tools. Therefore, sintered and repressed state are analysed, and the microstructural and mechanical properties of steel powders used for matrices development, grade High Speed Steels (HSS), AISI M2 and AISI M4, and low alloyed steel powders Ancorsteel 2000 and Ancorsteel 4600 V are defined. Also there are analysed the physical and mechanical properties of the reinforcement particles TiC, WC, Al2O3, B4C, SiC, etc. Are presented the manufacturing methods, the technological parameters for development of functionally graded materials in vertical and horizontal plans, compacting to 500-600 MPa,, sintering temperature to 1050 °C for SiC reinforcement and 1100-1150 °C for matrix reinforced with Al2O3 , repressing to 600 MPa/1100 °C of sintered preforms, heat treatment and wear properties of FGCM materials as Ancorsteel 2000 and Ancorsteel 4600 reinforced with Al2O3 and SiC particles

Manufacturing of Functionally Graded Porous Products by Selective Laser Sintering

2009 ◽  
Vol 631-632 ◽  
pp. 253-258 ◽  
Author(s):  
M. Erdal ◽  
Serkan Dag ◽  
Y. Jande ◽  
C.M. Tekin
Keyword(s):  
Mechanical Properties ◽  
Energy Density ◽  
Mechanical Response ◽  
Selective Laser Sintering ◽  
Physical And Mechanical Properties ◽  
Scanning Speed ◽  
Laser Sintering ◽  
Functionally Graded ◽  
Density Level ◽  
Functionally Graded Components

Selective laser sintering (SLS) is a rapid prototyping technique which is used to manufacture plastic and metal models. The porosity of the final product obtained by SLS can be controlled by changing the energy density level used during the manufacturing process. The energy density level is itself dependent upon manufacturing parameters such as laser power, hatching distance and scanning speed. Through mechanical characterization techniques, it is possible to quantitatively relate the energy density levels to particular strength values. The present study is directed towards manufacturing functionally graded polyamide products by changing the energy density level in a predetermined manner. The mechanical properties of the functionally graded components are characterized by means of tensile testing. Both homogeneous and functionally graded specimens are produced and tested in order to examine the influence of the energy density level on the mechanical response and on the ultimate tensile and rupture strengths. Selective laser sintering is shown to possess the potential to produce functionally graded porous specimens with controlled variations in physical and mechanical properties.

scholarly journals Mechanical Properties and In Vitro Behavior of Additively Manufactured and Functionally Graded Ti6Al4V Porous Scaffolds

Metals ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 200 ◽  
Author(s):  
Ezgi Onal ◽  
Jessica Frith ◽  
Marten Jurg ◽  
Xinhua Wu ◽  
Andrey Molotnikov
Keyword(s):  
Mechanical Properties ◽  
Functionally Graded ◽  
Porous Scaffolds

Functionally Graded MDP Panels Using Bamboo Particles

2015 ◽  
Vol 668 ◽  
pp. 39-47 ◽  
Author(s):  
Raquel Teodoro ◽  
Joabel Raabe ◽  
Danillo Wisky Silva ◽  
Rafael Farinassi Mendes ◽  
Lourival Marin Mendes ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Functionally Graded ◽  
Modulus Of Rupture ◽  
High Concentration ◽  
The Core ◽  
Pressing Time ◽  
The Face ◽  
The Impact

MDP (medium density particleboard) panels are normally graded in composition along their cross-section, using low-size particles and high concentration of adhesive on the particleboard surface (leading to improved physical and mechanical properties), and high-size particles in the particleboard core (interior), which provide higher porosity. Then, the aim of this study was to evaluate the impact of using different contents of bamboo particles in the particleboard core, on their physical and mechanical properties. The production of the panels was carried out using Pinusoocarpa (P) and Bambusavulgaris var. Vittata (B) particles in different contents (100% P, 100% B, 50% de B e 50% de P, 25% de B e 75% de P, 75% de B e 25% de P) in the core of the particleboards. The face of the particleboards were composed of P particles. The panels were produced with nominal density of 0.70 g/cm3, 40:60 face:core relation, 11% urea-formaldehyde adhesive in the faces and 8% adhesive for the core, specific pressure of 3.92 MPa, 160 °C temperature and pressing time of 8 min. After seasoning, the panels were submitted to evaluation of the thickness swelling (TS) and water absorption (WA) after 2 and 24 h of immersion, apparent density (AD), internal bonding (IB), modulus of rupture (MOR) and modulus of elasticity (MOE) under static bending. There was no statistical difference between the treatments for AD, IB, MOR and MOE values. Panels produced with high contents of bamboo particles (100% B, 75% B e 50% B) in the core, presented the lower WA and TS values, leading to improved dimensional stability than panels with only pinus particles. The present results show the important impact of using functionally gradation and bamboo particles on the physical properties of the MDP panels produced.

The influence of chemical etching on porous structure and mechanical properties of the Ti6AL4V Functionally Graded Porous Scaffolds fabricated by EBM

2022 ◽  
Vol 275 ◽  
pp. 125217
Author(s):  
Maria A. Surmeneva ◽  
Dmitriy Khrapov ◽  
Konstantin Prosolov ◽  
Maria Kozadayeva ◽  
Andrey Koptyug ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Porous Structure ◽  
Chemical Etching ◽  
Functionally Graded ◽  
Porous Scaffolds

PEMANFAATAN KAYU AKASIA MANGIUM (Acacia mangium Willd) UNTUK MEBEL

2012 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Djoko Purwanto
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Physical Properties ◽  
Treatment Process ◽  
Acacia Mangium ◽  
Physical And Mechanical Properties ◽  
Wood Fibers ◽  
Test Parameters ◽  
Mechanical And Physical Properties ◽  
Scale Scores

Timber Acacia mangium (Acacia mangium, Willd) for Furniture. The study aims to determine the mechanical and physical properties and the decorative value (color and fiber) wood of acacia mangium with using finishing materials. This type of finishing material used is ultran lasur natural dof ,ultran lasur classic teak, aqua politur clear dof, aqua politur akasia dan aqua politur cherry. After finishing the wood is stored for 3 months. Test parameters were observed, namely, physical and mechanical properties of wood, adhesion of finishing materials, color and appearance of the fiber, and timber dimensions expansion. The results showed that the mechanical physical properties of acacia wood qualified SNI. 01-0608-89 about the physical and mechanical properties of wood for furniture, air dry the moisture content from 13.78 to 14.89%, flexural strength from 509.25 to 680.50 kg/cm2, and compressive strength parallel to fiber 342.1 - 412.9 kg/cm2. Finishing the treatment process using five types of finishing materials can increase the decorative value (color and fiber) wood. Before finishing the process of acacia mangium wood has the appearance of colors and fibers and less attractive (scale scores 2-3), after finishing acacia wood fibers have the appearance of colors and interesting and very interesting (scale 4-5).Keywords: mangium wood, mechanical properties, decorative value, finishing, furniture.

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