TY - GEN
T1 - Using BB-gun or Acoustic Excitation to Find High Frequency Modes in Additively Manufactured Parts
AU - Allen, Aimee
AU - Johnson, Kevin
AU - Blough, Jason R.
AU - Barnard, Andrew
AU - Hartwig, Troy
AU - Brown, Ben
AU - Soine, David
AU - Cullom, Tristan
AU - Bristow, Douglas
AU - Landers, Robert
AU - Kinzel, Edward
N1 - Publisher Copyright:
© 2021, The Society for Experimental Mechanics, Inc.
PY - 2021
Y1 - 2021
N2 - Additive manufacturing (AM) considers parts that are produced at a low volume or with complex geometries. Identifying internal defects on these parts is difficult as current testing techniques are not optimized for AM processes. The resonant frequency method can be used to find defects in AM parts as an alternative to X-ray or CT scanning. Higher frequency modes at approximately 8000 Hz and above cannot be tested with a traditional modal hammer or shaker since they do not provide enough excitation. The goal of this paper is to evaluate creative testing techniques to find internal defects in parts with high frequency modes. The two types of testing methods considered are acoustic excitation provided by two speakers and high velocity impact testing produced by a BB – gun. Although the frequency ranges of interest are part dependent, these techniques were able to reach up to 16,000 Hz, which is an additional 8000 Hz above what the traditional modal hammer is able to reach. This work was funded by the Department of Energy’s Kansas City National Security Campus which is operated and managed by Honeywell Federal Manufacturing Technologies, LLC under contract number DE-NA0002839.
AB - Additive manufacturing (AM) considers parts that are produced at a low volume or with complex geometries. Identifying internal defects on these parts is difficult as current testing techniques are not optimized for AM processes. The resonant frequency method can be used to find defects in AM parts as an alternative to X-ray or CT scanning. Higher frequency modes at approximately 8000 Hz and above cannot be tested with a traditional modal hammer or shaker since they do not provide enough excitation. The goal of this paper is to evaluate creative testing techniques to find internal defects in parts with high frequency modes. The two types of testing methods considered are acoustic excitation provided by two speakers and high velocity impact testing produced by a BB – gun. Although the frequency ranges of interest are part dependent, these techniques were able to reach up to 16,000 Hz, which is an additional 8000 Hz above what the traditional modal hammer is able to reach. This work was funded by the Department of Energy’s Kansas City National Security Campus which is operated and managed by Honeywell Federal Manufacturing Technologies, LLC under contract number DE-NA0002839.
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U2 - 10.1007/978-3-030-47713-4_9
DO - 10.1007/978-3-030-47713-4_9
M3 - Conference contribution
AN - SCOPUS:85093123536
SN - 9783030477127
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 77
EP - 84
BT - Sensors and Instrumentation, Aircraft/Aerospace, Energy Harvesting and Dynamic Environments Testing, Volume 7 - Proceedings of the 38th IMAC, A Conference and Exposition on Structural Dynamics, 2020
A2 - Walber, Chad
A2 - Walter, Patrick
A2 - Seidlitz, Steve
PB - Springer
T2 - 38th IMAC, A Conference and Exposition on Structural Dynamics, 2020
Y2 - 10 February 2020 through 13 February 2020
ER -