Abstract
Carbon fiber reinforced polymer (CFRP) composite is known for its high stiffness-to-weight ratio and hence is of great interest in several engineering fields such as aerospace, automotive, defense, etc. However, such a composite is not suitable for energy dissipation as failure occurs with very little or no plastic deformation. Herein, we present an extendable multi-material projection microstereolithography process capable of producing carbon-fiber-reinforced cellular materials that achieve simultaneously high specific stiffness and damping coefficient. Inspired by the upper bounds of stiffness-loss coefficient in a two-phase composite, we designed and additively manufactured CFRP microlattices with soft phases architected into selected stiff-phase struts. Our results, confirmed by experimental and analytical calculations, revealed that the damping performance can be significantly enhanced by the addition of only a small fraction of the soft phase. The presented design and additive manufacturing strategy allow for optimizing mutually exclusive properties. As a result, these CFRP microlattices achieved high specific stiffness comparable to commercial CFRP, technical ceramics, and composites, while being dissipative like elastomers.
| Original language | English |
|---|---|
| Article number | 101106 |
| Journal | Additive Manufacturing |
| Volume | 32 |
| DOIs | |
| State | Published - Mar 2020 |
Funding
This work is sponsored by the U.S. Department of Energy , Office of Energy Efficiency and Renewable Energy , Vehicle Technologies Program , under contract DE-AC05-00OR22725 with UT-Battelle, LLC ( 4000162266 ). C. Ha, R. Kadam and X. Zheng would also like to thank the AFOSR Air Force Office of Scientific Research ( FA9550‐18‐1‐0299 ) and Office of Naval Research ( N00014‐18‐1‐2553 ) for financial support. Copyright: This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).
| Funders | Funder number |
|---|---|
| National Science Foundation | 2001677 |
| Office of Naval Research | N00014‐18‐1‐2553 |
| U.S. Department of Energy | |
| Air Force Office of Scientific Research | FA9550‐18‐1‐0299 |
| Office of Energy Efficiency and Renewable Energy | DE-AC05-00OR22725 |
| UT-Battelle | 4000162266 |
Keywords
- Carbon fiber reinforced polymer
- Cellular material
- Damping
- Multi-material additive manufacturing
- Stereolithography
