Abstract
This paper describes the retention of metal powder within additively manufactured structures to achieve increased damping. Solid and hollow (powder filled) aluminum cylinders were fabricated in using laser powder bed fusion where the internal, captured powder in the hollow cylinders served as an energy dissipation mechanism. Impact testing was completed to compare the frequency response functions of three cylinder geometries: one solid cross-section and two hollow cross-sections with different inner diameters and, therefore, different powder volumes. Increased damping with larger inner diameter was observed. The damping was quantified using a structural damping model.
| Original language | English |
|---|---|
| Pages (from-to) | 1-5 |
| Number of pages | 5 |
| Journal | Manufacturing Letters |
| Volume | 25 |
| DOIs | |
| State | Published - Aug 2020 |
Funding
This research was supported by the DOE Office of Energy Efficiency and Renewable Energy (EERE), Energy and Transportation Science Division, and used resources at the Manufacturing Demonstration Facility, a DOE-EERE User Facility at Oak Ridge National Laboratory. The authors gratefully acknowledge Kevin Sisco, Alex Plotkowski, and Ryan Dehoff, ORNL, for the cylinder printing and Paul Brackman, Zeiss, for the computed tomography scans. This research was supported by the DOE Office of Energy Efficiency and Renewable Energy (EERE), Energy and Transportation Science Division, and used resources at the Manufacturing Demonstration Facility, a DOE - EERE User Facility at Oak Ridge National Laboratory . The authors gratefully acknowledge Kevin Sisco, Alex Plotkowski, and Ryan Dehoff, ORNL, for the cylinder printing and Paul Brackman, Zeiss, for the computed tomography scans. Notice: This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE 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 ).
Keywords
- Additive manufacturing
- Damping
- Powder
- Structural dynamics