Experimental Verification of Pulse Shaping in Elastic Metamaterials Under Impact ExcitationSource: Journal of Vibration and Acoustics:;2022:;volume( 145 ):;issue: 002::page 21009-1DOI: 10.1115/1.4056043Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: We present experimental verification of pulse shaping in elastic metamaterials together with a procedure to design, fabricate, and verify metamaterial pulse shapers under impact excitation. The split Hopkinson pressure bar (SHPB) test, a fundamental dynamic test introduced more than 70 years ago, often incorporates pulse shaping as a means to alter a stress wave, providing the primary motivation for the presented study. Elastic metamaterials hold promise for enhancing conventional pulse shaping abilities and improving capabilities of the SHPB test. We first design the pulse shaper by numerically optimizing its response using finite element analysis. The pulse shaper consists of repeated unit cells based on a combination of a phononic crystal and a local resonator. Then, we fabricate and test pulse shaper candidates to validate the procedural efficacy. An iterative element corrects inaccuracies in input force and material properties and allows convergence on an appropriate pulse shaper. We carry out this procedure by designing pulse shapers fabricated from 3D-printed polylactic acid (PLA) to achieve an extended dwell acceleration pulse shape. In experimental impact tests, the procedure results in rise, dwell, and fall behaviors comparable to that predicted, effectively confirming the efficacy of the presented procedure and verifying the performance of metamaterial-based pulse shapers.
|
Collections
Show full item record
contributor author | Dorgant, Greg | |
contributor author | Johnson, William R. | |
contributor author | DeLima, Washington | |
contributor author | Leamy, Michael J. | |
date accessioned | 2023-08-16T18:12:31Z | |
date available | 2023-08-16T18:12:31Z | |
date copyright | 11/9/2022 12:00:00 AM | |
date issued | 2022 | |
identifier issn | 1048-9002 | |
identifier other | vib_145_2_021009.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4291620 | |
description abstract | We present experimental verification of pulse shaping in elastic metamaterials together with a procedure to design, fabricate, and verify metamaterial pulse shapers under impact excitation. The split Hopkinson pressure bar (SHPB) test, a fundamental dynamic test introduced more than 70 years ago, often incorporates pulse shaping as a means to alter a stress wave, providing the primary motivation for the presented study. Elastic metamaterials hold promise for enhancing conventional pulse shaping abilities and improving capabilities of the SHPB test. We first design the pulse shaper by numerically optimizing its response using finite element analysis. The pulse shaper consists of repeated unit cells based on a combination of a phononic crystal and a local resonator. Then, we fabricate and test pulse shaper candidates to validate the procedural efficacy. An iterative element corrects inaccuracies in input force and material properties and allows convergence on an appropriate pulse shaper. We carry out this procedure by designing pulse shapers fabricated from 3D-printed polylactic acid (PLA) to achieve an extended dwell acceleration pulse shape. In experimental impact tests, the procedure results in rise, dwell, and fall behaviors comparable to that predicted, effectively confirming the efficacy of the presented procedure and verifying the performance of metamaterial-based pulse shapers. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Experimental Verification of Pulse Shaping in Elastic Metamaterials Under Impact Excitation | |
type | Journal Paper | |
journal volume | 145 | |
journal issue | 2 | |
journal title | Journal of Vibration and Acoustics | |
identifier doi | 10.1115/1.4056043 | |
journal fristpage | 21009-1 | |
journal lastpage | 21009-9 | |
page | 9 | |
tree | Journal of Vibration and Acoustics:;2022:;volume( 145 ):;issue: 002 | |
contenttype | Fulltext |