Functionally graded Nylon-11/silica nanocomposites produced by selective laser sintering

This paper investigates the unusual characteristics regarding the mechanical properties of Nylon-11 filled with different volume fractions of silica nanoparticles by selective laser sintering (SLS) from numerical simulation. The compressive modulus was predicted by two different numerical models and compared with the experimentally measured one. While the two-phase model has a limited capability in explaining the unusual behavior shown in the compressive modulus obtained by experiments with 2% volume fraction of nanoparticles, the effective interface model can simulate the unexpected characteristic of nanocomposites according to the volume fraction of nanoparticles. We can conclude that the effective interface model should be employed to predict the mechanical properties of nanocomposites for efficiency and accuracy.

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Development of functionally-graded reservoir of PCL/PG by selective laser sintering for drug delivery devices

Virtual and Physical Prototyping ◽

10.1080/17452759.2012.687911 ◽

2012 ◽

Vol 7 (2) ◽

pp. 107-115 ◽

Cited By ~ 16

Author(s):

G.V. Salmoria ◽

P. Klauss ◽

K. Zepon ◽

L.A. Kanis ◽

C.R.M. Roesler ◽

...

Keyword(s):

Drug Delivery ◽

Selective Laser Sintering ◽

Laser Sintering ◽

Functionally Graded ◽

Drug Delivery Devices

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Selective laser sintering of functionally graded tissue scaffolds

MRS Bulletin ◽

10.1557/mrs.2011.271 ◽

2011 ◽

Vol 36 (12) ◽

pp. 1006-1014 ◽

Cited By ~ 27

Author(s):

C.K. Chua ◽

K.F. Leong ◽

N. Sudarmadji ◽

M.J.J. Liu ◽

S.M. Chou

Keyword(s):

Selective Laser Sintering ◽

Laser Sintering ◽

Tissue Scaffolds ◽

Functionally Graded ◽

Image Position

Abstract

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Manufacturing of Functionally Graded Porous Products by Selective Laser Sintering

Materials Science Forum ◽

10.4028/www.scientific.net/msf.631-632.253 ◽

2009 ◽

Vol 631-632 ◽

pp. 253-258 ◽

Cited By ~ 12

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.

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