Energy absorption characteristics of graded foams subjected to high velocity loading

Abigail Wohlford; Suraj Ravindran; Addis Kidane

doi:10.1007/978-3-319-95089-1_41

Energy absorption characteristics of graded foams subjected to high velocity loading

Abigail Wohlford, Suraj Ravindran, Addis Kidane

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

2 Scopus citations

Abstract

In this study the effect of layer stacking arrangement on the energy absorption characteristics of density-graded cellular polymers subjected to high velocity impact is investigated experimentally. Dynamic loading is performed using Split Hopkinson Pressure Bar (SHPB) which is also modified for a direct impact experiment. Different bulk density polymeric foam layers are bonded together in different stacking arrangements and subjected to impact loading. Ultra-high speed imaging is implemented to measure the deformation and observe the formation and propagation of compaction waves during direct impact. The effect of the orientation of the discrete layers on the dynamic stress-strain response is analyzed using digital image correlation (DIC). The effects of material compressibility are implemented to the analysis. The approach uses DIC to calculate the full-field acceleration and material density, later used to determine the stress gradients developed in the material. The best arrangement of layer structure is chosen by the highest energy absorption characteristics measured. Failure mechanisms associated with energy dissipation in graded materials are discussed.

Original language	English (US)
Title of host publication	Dynamic Behavior of Materials, Volume 1 - Proceedings of the 2018 Annual Conference on Experimental and Applied Mechanics
Editors	Jamie Kimberley, Leslie Elise Lamberson, Steven Mates
Publisher	Springer Science and Business Media, LLC
Pages	229-232
Number of pages	4
ISBN (Print)	9783319950884
DOIs	https://doi.org/10.1007/978-3-319-95089-1_41
State	Published - 2019
Externally published	Yes
Event	SEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2018 - Greenville, United States Duration: Jun 4 2018 → Jun 7 2018

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, 2018
Country/Territory	United States
City	Greenville
Period	6/4/18 → 6/7/18

Bibliographical note

Publisher Copyright:
© The Society for Experimental Mechanics, Inc. 2019.

Keywords

Digital image correlation
Dynamic loading
Energy absorption
Graded materials
Polymeric foam

Publisher link

10.1007/978-3-319-95089-1_41

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Wohlford, A., Ravindran, S., & Kidane, A. (2019). Energy absorption characteristics of graded foams subjected to high velocity loading. In J. Kimberley, L. E. Lamberson, & S. Mates (Eds.), Dynamic Behavior of Materials, Volume 1 - Proceedings of the 2018 Annual Conference on Experimental and Applied Mechanics (pp. 229-232). (Conference Proceedings of the Society for Experimental Mechanics Series). Springer Science and Business Media, LLC. https://doi.org/10.1007/978-3-319-95089-1_41

Energy absorption characteristics of graded foams subjected to high velocity loading. / Wohlford, Abigail; Ravindran, Suraj; Kidane, Addis.
Dynamic Behavior of Materials, Volume 1 - Proceedings of the 2018 Annual Conference on Experimental and Applied Mechanics. ed. / Jamie Kimberley; Leslie Elise Lamberson; Steven Mates. Springer Science and Business Media, LLC, 2019. p. 229-232 (Conference Proceedings of the Society for Experimental Mechanics Series).

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

Wohlford, A, Ravindran, S & Kidane, A 2019, Energy absorption characteristics of graded foams subjected to high velocity loading. in J Kimberley, LE Lamberson & S Mates (eds), Dynamic Behavior of Materials, Volume 1 - Proceedings of the 2018 Annual Conference on Experimental and Applied Mechanics. Conference Proceedings of the Society for Experimental Mechanics Series, Springer Science and Business Media, LLC, pp. 229-232, SEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2018, Greenville, United States, 6/4/18. https://doi.org/10.1007/978-3-319-95089-1_41

Wohlford A, Ravindran S, Kidane A. Energy absorption characteristics of graded foams subjected to high velocity loading. In Kimberley J, Lamberson LE, Mates S, editors, Dynamic Behavior of Materials, Volume 1 - Proceedings of the 2018 Annual Conference on Experimental and Applied Mechanics. Springer Science and Business Media, LLC. 2019. p. 229-232. (Conference Proceedings of the Society for Experimental Mechanics Series). doi: 10.1007/978-3-319-95089-1_41

Wohlford, Abigail ; Ravindran, Suraj ; Kidane, Addis. / Energy absorption characteristics of graded foams subjected to high velocity loading. Dynamic Behavior of Materials, Volume 1 - Proceedings of the 2018 Annual Conference on Experimental and Applied Mechanics. editor / Jamie Kimberley ; Leslie Elise Lamberson ; Steven Mates. Springer Science and Business Media, LLC, 2019. pp. 229-232 (Conference Proceedings of the Society for Experimental Mechanics Series).

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abstract = "In this study the effect of layer stacking arrangement on the energy absorption characteristics of density-graded cellular polymers subjected to high velocity impact is investigated experimentally. Dynamic loading is performed using Split Hopkinson Pressure Bar (SHPB) which is also modified for a direct impact experiment. Different bulk density polymeric foam layers are bonded together in different stacking arrangements and subjected to impact loading. Ultra-high speed imaging is implemented to measure the deformation and observe the formation and propagation of compaction waves during direct impact. The effect of the orientation of the discrete layers on the dynamic stress-strain response is analyzed using digital image correlation (DIC). The effects of material compressibility are implemented to the analysis. The approach uses DIC to calculate the full-field acceleration and material density, later used to determine the stress gradients developed in the material. The best arrangement of layer structure is chosen by the highest energy absorption characteristics measured. Failure mechanisms associated with energy dissipation in graded materials are discussed.",

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AU - Ravindran, Suraj

AU - Kidane, Addis

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PY - 2019

Y1 - 2019

N2 - In this study the effect of layer stacking arrangement on the energy absorption characteristics of density-graded cellular polymers subjected to high velocity impact is investigated experimentally. Dynamic loading is performed using Split Hopkinson Pressure Bar (SHPB) which is also modified for a direct impact experiment. Different bulk density polymeric foam layers are bonded together in different stacking arrangements and subjected to impact loading. Ultra-high speed imaging is implemented to measure the deformation and observe the formation and propagation of compaction waves during direct impact. The effect of the orientation of the discrete layers on the dynamic stress-strain response is analyzed using digital image correlation (DIC). The effects of material compressibility are implemented to the analysis. The approach uses DIC to calculate the full-field acceleration and material density, later used to determine the stress gradients developed in the material. The best arrangement of layer structure is chosen by the highest energy absorption characteristics measured. Failure mechanisms associated with energy dissipation in graded materials are discussed.

AB - In this study the effect of layer stacking arrangement on the energy absorption characteristics of density-graded cellular polymers subjected to high velocity impact is investigated experimentally. Dynamic loading is performed using Split Hopkinson Pressure Bar (SHPB) which is also modified for a direct impact experiment. Different bulk density polymeric foam layers are bonded together in different stacking arrangements and subjected to impact loading. Ultra-high speed imaging is implemented to measure the deformation and observe the formation and propagation of compaction waves during direct impact. The effect of the orientation of the discrete layers on the dynamic stress-strain response is analyzed using digital image correlation (DIC). The effects of material compressibility are implemented to the analysis. The approach uses DIC to calculate the full-field acceleration and material density, later used to determine the stress gradients developed in the material. The best arrangement of layer structure is chosen by the highest energy absorption characteristics measured. Failure mechanisms associated with energy dissipation in graded materials are discussed.

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KW - Dynamic loading

KW - Energy absorption

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ER -

Energy absorption characteristics of graded foams subjected to high velocity loading

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