Achieving Functionally Graded Material Composition Through Bicontinuous Mesostructural Geometry in Material Extrusion Additive Manufacturing

Functionally graded materials (FGMs) gradually change composition throughout their volume, allowing for areas of a part to be optimized for specific performance requirements. While additive manufacturing (AM) process types such as material jetting and directed energy deposition are capable of creati...

Full description

Saved in:
Bibliographic Details
Published in:JOM (1989) 2018-03, Vol.70 (3), p.413-418
Main Authors: Stoner, Brant, Bartolai, Joseph, Kaweesa, Dorcas V., Meisel, Nicholas A., Simpson, Timothy W.
Format: Article
Language:English
Subjects:
Additive manufacturing
Boolean
Chemistry/Food Science
Concentration (composition)
Design
Earth Sciences
Engineering
Environment
Extrusion
Functionally gradient materials
Geometry
Inequality
Physics
Solid Freeform Fabrication
Surface structure
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Functionally graded materials (FGMs) gradually change composition throughout their volume, allowing for areas of a part to be optimized for specific performance requirements. While additive manufacturing (AM) process types such as material jetting and directed energy deposition are capable of creating FGMs, design guidelines for varying the material composition in an FGM do not exist. This article presents a novel design solution for FGMs: creating the material gradient by varying the mesostructural size and thickness of bicontinuous, multi-material geometries. By using a bicontinuous structure, such as Schoen’s gyroid surface or Schwarz’s P and D surfaces, each component material exists as a continuous discrete structure, which allows FGMs to be fabricated by a wider range of AM processes. The gradient is created by varying the volume fraction occupied by the surface structure inside the part volume. This article explores the use of this technique to create FGMs with material extrusion AM. Properties of these bicontinuous structures are experimentally characterized and shown to outperform typical material extrusion FGMs.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-017-2669-z