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William R. Johnson
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Journal Articles

Experimental Verification of Pulse Shaping in Elastic Metamaterials Under Impact Excitation

Greg Dorgant, William R. Johnson, Washington DeLima, Michael J. Leamy
Journal: Journal of Vibration and Acoustics
Article Type: Research Papers
J. Vib. Acoust. April 2023, 145(2): 021009.
Paper No: VIB-22-1245
DOI: https://doi.org/10.1115/1.4056043
Published Online: November 9, 2022
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Topics: Additive manufacturing, Design, Excitation, Finite element analysis, Manufacturing, Materials properties, Metamaterials, Optimization, Pulse shaping, Shapes
Proceedings Papers

Machine Learning Models of Burst Strength for Defect-Free Pipelines

Xian-Kui Zhu, William R. Johnson, Robert Sindelar, Bruce Wiersma
Proc. ASME. PVP2022, Volume 4B: Materials and Fabrication, V04BT06A043, July 17–22, 2022
Paper No: PVP2022-84908
DOI: https://doi.org/10.1115/PVP2022-84908
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Topics: Artificial neural networks, Machine learning, Pipelines
Proceedings Papers

New Strength Theory and Its Application to Determine Burst Pressure of Thick-Wall Pressure Vessels

Xian-Kui Zhu, Bruce Wiersma, Robert Sindelar, William R. Johnson
Proc. ASME. PVP2022, Volume 4B: Materials and Fabrication, V04BT06A042, July 17–22, 2022
Paper No: PVP2022-84902
DOI: https://doi.org/10.1115/PVP2022-84902
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Topics: Pipelines, Pressure, Pressure vessels
Journal Articles

Phononic Materials for Pulse Shaping in Elastic Waveguides Motivated by Shock Testing

William R. Johnson, Michael J. Leamy, Washington DeLima, Massimo Ruzzene
Journal: Journal of Vibration and Acoustics
Article Type: Research Papers
J. Vib. Acoust. August 2022, 144(4): 041012.
Paper No: VIB-21-1341
DOI: https://doi.org/10.1115/1.4053778
Published Online: March 11, 2022
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Topics: Optimization, Phononic crystals, Shapes, Stiffness, Waves, Pulse shaping, Waveguides, Shock (Mechanics), Errors, Finite element analysis
Proceedings Papers

Pulse Shaping in 1D Elastic Waveguides for Shock Testing

William R. Johnson, Michael J. Leamy, Washington DeLima, Massimo Ruzzene
Proc. ASME. IMECE2020, Volume 1: Acoustics, Vibration, and Phononics, V001T01A014, November 16–19, 2020
Paper No: IMECE2020-23280
DOI: https://doi.org/10.1115/IMECE2020-23280
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Topics: Pulse shaping, Shock (Mechanics), Testing, Waveguides, Shapes, Waves, Electronics, Metamaterials, Phononic crystals, Projectiles