Design and Characterization of Cellular Solids from Modeling through Solid Freeform Fabrication, 8/2006

50 %
50 %
Information about Design and Characterization of Cellular Solids from Modeling through...
Health & Medicine

Published on September 30, 2008

Author: organprinter

Source: slideshare.net

Description

Presentation given to the Solid Freeform Fabrication Conference, Austin, TX 8/2006

ABSTRACT
Cellular solids studies the mechanical effects of the material arrangement of architectures for the goal of designing materials which are lightweight and possess high structural integrity. These architectures present themselves frequently in structural members in nature (bone, plant stalks, and porous rock) and are now used frequently in design (tissue engineering scaffolds, mechanical design). Until now however, physical studies of these architectures have been completed using molding techniques (for 2D) and random models (for 3D). Rapid prototyping (RP) provides high repeatability during replication which decreases error in studied samples and can serve to reduce the number of conflicting variables which confound the development of structural relationships. In this study we designed and characterized four geometric solids from the Platonic and Archimedean set of polyhedra, the simplest architectures that exist in nature which exhibit symmetry and order. Multiple models of these polyhedra were generated using computer aided design at similar topologies but with varying volume fractions. Employing finite element analysis we analyzed the structures with simulated uni-axial linear compressive tests. We then built actual models of the architectures using solid laser sintering (SLS) with a Sinterstation 2500Plus. The architectures were printed at porosities of 80% and 90% by volume with a bounding box of 2cm x 2cm x 2cm. After printing of the models, they were scanned with micro-computed tomography (µCT) as a validation of the use of SLS for fabrication of computer modeled architectures. Finally, the architectures were compressed to fracture using an MTS, validating the modeling component of the design and providing information which will allow for the determination of relationships which govern the material arrangement and resulting mechanical properties. These results of this study are useful in the development of models which directly relate complex architecture to mechanical properties; these models can be used to develop any architecture based on given input parameters such as porosity, surface area, connectivity and fracture pattern.

Add a comment

Related presentations

Related pages

Faculty Information System - Scholarly Interest Report

... Liebschner M. "Geometric Characterization of Scaffold ... of Cellular Solids from Modeling through Solid Freeform ... 8, 2006) With Zhong Lin ...
Read more

Indirect Rapid Prototyping for Tissue Engineering ...

Chapter 8 – Indirect Rapid Prototyping for Tissue Engineering. ... framed solids by means of freeform ... design and solid freeform fabrication ...
Read more

Structural and material approaches to bone tissue ...

... concerning the use of powder-based three-dimensional printing ... testing system for cellular solids. ... at the Solid Freeform Fabrication ...
Read more

Patent US8157908 - Three dimensional printing material ...

A materials system and methods are provided to enable the formation of articles by Three Dimensional Printing. The materials system includes a transition ...
Read more

Patent US7905951 - Three dimensional printing material ...

A materials system and methods are provided to enable the formation of articles by Three Dimensional Printing. The materials system includes a transition ...
Read more

Patent US7795349 - Material systems and methods of three ...

The present invention is directed to three-dimensional printing material systems and method, and an article made therefrom. The method of the present ...
Read more

Publikationsliste - publik.tuwien.ac.at

"Modeling Solid-State ... "Characterization of Cellular Metals ... "Micro- and Nanoparts generated by laser-based Solid Freeform Fabrication ...
Read more

www.cienciasemfronteiras.gov.br

• Nano/Micro Solid Freeform Fabrication ... • Design and Fabrication of Micro-SOFC [Solid ... • Development of material characterization, modeling ...
Read more

Physics and Materials Science by Katharine Bale - issuu

... Physics and Materials Science ... Through a solid assessment of ... a solid background in characterization and fabrication methods while ...
Read more