Observations of Velocity-Dependent Drag and Bearing Stress in Sand Penetration

B. Kenneally; M. Omidvar; S. Bless; M. Iskander

doi:10.1007/978-3-030-59947-8_6

Observations of Velocity-Dependent Drag and Bearing Stress in Sand Penetration

B. Kenneally, M. Omidvar, S. Bless, M. Iskander

Civil and Urban Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Data from rapid penetration tests into granular media were analyzed using a two-step Poncelet equation to determine values for the Poncelet drag coefficient on a projectile. The data were from a spherical projectile launched into both densely and loosely packed Ottawa sand at transonic impact velocities of approximately 300 m/s. Velocity data were obtained and integrated over time to produce data for penetration depth. Three approaches were investigated: (1) Fitting the data with a constant drag coefficient, (2) fitting the data with a constant drag coefficient along with a constant velocity-independent term computed as the average of the quasi-static penetration resistance into the same target, and (3) by separating the data into two segments about a transition velocity, and using best fit values for the inertial drag and bearing stress terms. The latter approach produced superior fits compared to the other two procedures investigated. The result indicates a velocity dependence of both the inertial drag coefficient and bearing stress on a projectile during rapid penetration into granular media.

Original language	English (US)
Title of host publication	Dynamic Behavior of Materials - Proceedings of the 2020 Annual Conference on Experimental and Applied Mechanics
Editors	Leslie Lamberson, Steven Mates, Veronica Eliasson
Publisher	Springer
Pages	29-35
Number of pages	7
ISBN (Print)	9783030599461
DOIs	https://doi.org/10.1007/978-3-030-59947-8_6
State	Published - 2021
Event	SEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2020 - Orlando, United States Duration: Sep 14 2020 → Sep 17 2020

Publication series

Name	Conference Proceedings of the Society for Experimental Mechanics Series
ISSN (Print)	2191-5644
ISSN (Electronic)	2191-5652

Conference

Conference	SEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2020
Country/Territory	United States
City	Orlando
Period	9/14/20 → 9/17/20

Keywords

Drag
Penetration Depth
Poncelet
Projectile
Sand

ASJC Scopus subject areas

General Engineering
Computational Mechanics
Mechanical Engineering

Access to Document

10.1007/978-3-030-59947-8_6

Cite this

Kenneally, B., Omidvar, M., Bless, S., & Iskander, M. (2021). Observations of Velocity-Dependent Drag and Bearing Stress in Sand Penetration. In L. Lamberson, S. Mates, & V. Eliasson (Eds.), Dynamic Behavior of Materials - Proceedings of the 2020 Annual Conference on Experimental and Applied Mechanics (pp. 29-35). (Conference Proceedings of the Society for Experimental Mechanics Series). Springer. https://doi.org/10.1007/978-3-030-59947-8_6

Observations of Velocity-Dependent Drag and Bearing Stress in Sand Penetration. / Kenneally, B.; Omidvar, M.; Bless, S. et al.
Dynamic Behavior of Materials - Proceedings of the 2020 Annual Conference on Experimental and Applied Mechanics. ed. / Leslie Lamberson; Steven Mates; Veronica Eliasson. Springer, 2021. p. 29-35 (Conference Proceedings of the Society for Experimental Mechanics Series).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kenneally, B, Omidvar, M, Bless, S & Iskander, M 2021, Observations of Velocity-Dependent Drag and Bearing Stress in Sand Penetration. in L Lamberson, S Mates & V Eliasson (eds), Dynamic Behavior of Materials - Proceedings of the 2020 Annual Conference on Experimental and Applied Mechanics. Conference Proceedings of the Society for Experimental Mechanics Series, Springer, pp. 29-35, SEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2020, Orlando, United States, 9/14/20. https://doi.org/10.1007/978-3-030-59947-8_6

Kenneally B, Omidvar M, Bless S, Iskander M. Observations of Velocity-Dependent Drag and Bearing Stress in Sand Penetration. In Lamberson L, Mates S, Eliasson V, editors, Dynamic Behavior of Materials - Proceedings of the 2020 Annual Conference on Experimental and Applied Mechanics. Springer. 2021. p. 29-35. (Conference Proceedings of the Society for Experimental Mechanics Series). doi: 10.1007/978-3-030-59947-8_6

Kenneally, B. ; Omidvar, M. ; Bless, S. et al. / Observations of Velocity-Dependent Drag and Bearing Stress in Sand Penetration. Dynamic Behavior of Materials - Proceedings of the 2020 Annual Conference on Experimental and Applied Mechanics. editor / Leslie Lamberson ; Steven Mates ; Veronica Eliasson. Springer, 2021. pp. 29-35 (Conference Proceedings of the Society for Experimental Mechanics Series).

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abstract = "Data from rapid penetration tests into granular media were analyzed using a two-step Poncelet equation to determine values for the Poncelet drag coefficient on a projectile. The data were from a spherical projectile launched into both densely and loosely packed Ottawa sand at transonic impact velocities of approximately 300 m/s. Velocity data were obtained and integrated over time to produce data for penetration depth. Three approaches were investigated: (1) Fitting the data with a constant drag coefficient, (2) fitting the data with a constant drag coefficient along with a constant velocity-independent term computed as the average of the quasi-static penetration resistance into the same target, and (3) by separating the data into two segments about a transition velocity, and using best fit values for the inertial drag and bearing stress terms. The latter approach produced superior fits compared to the other two procedures investigated. The result indicates a velocity dependence of both the inertial drag coefficient and bearing stress on a projectile during rapid penetration into granular media.",

keywords = "Drag, Penetration Depth, Poncelet, Projectile, Sand",

author = "B. Kenneally and M. Omidvar and S. Bless and M. Iskander",

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N1 - Funding Information: Acknowledgement The authors gratefully acknowledge the support of the Strategic Environmental Research and Development Program (SERDP) of the United States of America, Grant No.: MR19-1277. Publisher Copyright: © 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.

PY - 2021

Y1 - 2021

N2 - Data from rapid penetration tests into granular media were analyzed using a two-step Poncelet equation to determine values for the Poncelet drag coefficient on a projectile. The data were from a spherical projectile launched into both densely and loosely packed Ottawa sand at transonic impact velocities of approximately 300 m/s. Velocity data were obtained and integrated over time to produce data for penetration depth. Three approaches were investigated: (1) Fitting the data with a constant drag coefficient, (2) fitting the data with a constant drag coefficient along with a constant velocity-independent term computed as the average of the quasi-static penetration resistance into the same target, and (3) by separating the data into two segments about a transition velocity, and using best fit values for the inertial drag and bearing stress terms. The latter approach produced superior fits compared to the other two procedures investigated. The result indicates a velocity dependence of both the inertial drag coefficient and bearing stress on a projectile during rapid penetration into granular media.

AB - Data from rapid penetration tests into granular media were analyzed using a two-step Poncelet equation to determine values for the Poncelet drag coefficient on a projectile. The data were from a spherical projectile launched into both densely and loosely packed Ottawa sand at transonic impact velocities of approximately 300 m/s. Velocity data were obtained and integrated over time to produce data for penetration depth. Three approaches were investigated: (1) Fitting the data with a constant drag coefficient, (2) fitting the data with a constant drag coefficient along with a constant velocity-independent term computed as the average of the quasi-static penetration resistance into the same target, and (3) by separating the data into two segments about a transition velocity, and using best fit values for the inertial drag and bearing stress terms. The latter approach produced superior fits compared to the other two procedures investigated. The result indicates a velocity dependence of both the inertial drag coefficient and bearing stress on a projectile during rapid penetration into granular media.

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Observations of Velocity-Dependent Drag and Bearing Stress in Sand Penetration

Abstract

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Conference

Keywords

ASJC Scopus subject areas

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