The aim of this paper is to (1) introduce an approach, called Polytope Sector-based Synthesis, for synthesizing 2D or 3D microstructural architectures that exhibit a desired bulk-property directionality (e.g., isotropic, cubic, orthotropic, etc.), and (2) provide general analytical methods that can be used to rapidly optimize the geometric parameters of these architectures such that they achieve a desired combination of bulk thermal conductivity and thermal expansion properties. Although the methods introduced can be applied to general beam-based microstructural architectures, we demonstrate their utility in the context of an architecture that can be tuned to achieve a large range of extreme thermal expansion coefficients — positive, zero, and negative. The material-property-combination region that can be achieved by this architecture is determined within an Ashby-material-property plot of thermal expansion vs. thermal conductivity using the analytical methods introduced. Both 2D and 3D versions of the design have been fabricated using projection microstereolithography.
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ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
August 2–5, 2015
Boston, Massachusetts, USA
Conference Sponsors:
- Design Engineering Division
- Computers and Information in Engineering Division
ISBN:
978-0-7918-5708-3
PROCEEDINGS PAPER
Polytope Sector-Based Synthesis and Analysis of Microarchitectured Materials With Tunable Thermal Conductivity and Expansion Available to Purchase
Jonathan B. Hopkins,
Jonathan B. Hopkins
University of California, Los Angeles, Los Angeles, CA
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Howon Lee,
Howon Lee
Rutgers The State University of New Jersey, Piscataway, NJ
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Nicholas X. Fang,
Nicholas X. Fang
Massachusetts Institute of Technology, Cambridge, MA
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Christopher M. Spadaccini
Christopher M. Spadaccini
Lawrence Livermore National Laboratory, Livermore, CA
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Jonathan B. Hopkins
University of California, Los Angeles, Los Angeles, CA
Howon Lee
Rutgers The State University of New Jersey, Piscataway, NJ
Nicholas X. Fang
Massachusetts Institute of Technology, Cambridge, MA
Christopher M. Spadaccini
Lawrence Livermore National Laboratory, Livermore, CA
Paper No:
DETC2015-46645, V02BT03A006; 13 pages
Published Online:
January 19, 2016
Citation
Hopkins, JB, Lee, H, Fang, NX, & Spadaccini, CM. "Polytope Sector-Based Synthesis and Analysis of Microarchitectured Materials With Tunable Thermal Conductivity and Expansion." Proceedings of the ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 2B: 41st Design Automation Conference. Boston, Massachusetts, USA. August 2–5, 2015. V02BT03A006. ASME. https://doi.org/10.1115/DETC2015-46645
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