Characterization of Damping Properties in 3D Printed Structures
Loading...
Date
2018-12-01
Access
Authors
Gietl, Jenna
Vignola, Joseph
Sterling, John
Ryan, Teresa
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Current research on the effectiveness of a subordinate oscillator array (SOA) as a broadband
mechanical filter relies on adequate knowledge of the SOAs material properties. Recent studies
have shown a high sensitivity of these structures to disorder. A desire to produce large numbers
of arrays to test this sensitivity to disorder motivated a transition from metal to 3-dimensional
printed plastic SOAs. Irregularities associated with the curing process of the 3D printed
polymers, as well as a general inconsistency of material properties of plastics, in turn highlighted
the need for characterization of properties of 3D printed materials, especially those properties
related to damping. As part of this study, several 3D printed plastic cantilevers, varying in
material, printing technique, and printing orientation, are measured. Quantities of interest
include the Young’s modulus and density, as well as phenomenological properties, like the
quality factor of specific designs. An ASTM standard test method for property determination
is implemented with a laser Doppler vibrometer (LDV) to test each polymer. In addition to the
ASTM protocol, tests are conducted in vacuum to distinguish internal damping mechanisms
of the cantilever from external fluid mechanisms. Results are compared to both analytic and
numeric predictions and published theory.
Description
Keywords
Citation
DOI
10.1088/1742-6596/1149/1/012002