Laser-driven shock experiments were conducted at a synchrotron facility to investigate the dynamic response of polyurethane foam. These experiments were coupled to in situ x-ray imaging to radiograph foam deformations and to determine the propagation velocity of stress waves. To increase the amplitude and the duration of the pressure load generated by the laser–matter interaction, the front surface of the target was covered with a confining layer (water and BK7 glass). Preliminary calibration tests involving time-resolved velocity measurements were performed to calculate the ablation pressure on the front surface of foam samples. The calculated pressure loads were used as input data for hydrodynamic simulations, in which the foam is modeled using a homogeneous porous macroscopic model, and model predictions were compared with experimental results. A fair consistency was found for most experiments, while for the others, an overestimation of the applied pressure is suspected, likely due to a laser breakdown within the confining medium. Finally, post-shot x-ray tomography of the recovered samples showed permanent deformation of the foam, unlike what was observed under quasi-static compression, and revealed heavy damage in the vicinity of the loaded zone.
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7 February 2022
Research Article|
February 02 2022
In situ radiographic and ex situ tomographic investigation of pore collapse in laser shock-loaded polyurethane foam
Special Collection:
Shock Behavior of Materials
P. Pradel
;
P. Pradel
a)
1
CEA CESTA
, 15 avenue des Sablières CS60001, 33116 Le Barp Cedex, France
a)Author to whom correspondence should be addressed: pierre.pradel@cea.fr
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T. de Rességuier
;
T. de Rességuier
2
Institut Pprime UPR3346 CNRS-Université de Poitiers-ENSMA
, 11 boulevard Marie et Pierre Curie, 86962 Futuroscope Chasseneuil Cedex, France
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F. Malaise;
F. Malaise
1
CEA CESTA
, 15 avenue des Sablières CS60001, 33116 Le Barp Cedex, France
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M. P. Olbinado
;
M. P. Olbinado
3
ESRF—The European Synchrotron
, CS40220, 38043 Grenoble Cedex 9, France
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A. Rack
;
A. Rack
3
ESRF—The European Synchrotron
, CS40220, 38043 Grenoble Cedex 9, France
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J. Grenzer;
J. Grenzer
4
Helmholtz-Zentrum Dresden-Rossendorf
, Bautzner Landstrasse 400, D-01328 Dresden, Germany
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D. Loison
;
D. Loison
5
Univ Rennes, CNRS, IPR (Institut de Physique de Rennes)—UMR 6251
, F-35000 Rennes, France
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L. Berthe
L. Berthe
6
PIMM, UMR8006 ENSAM, CNRS, CNAM
, 151 bd de l'Hôpital, 75013 Paris, France
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a)Author to whom correspondence should be addressed: pierre.pradel@cea.fr
Note: This paper is part of the Special Topic on Shock Behavior of Materials.
J. Appl. Phys. 131, 055106 (2022)
Article history
Received:
November 04 2021
Accepted:
January 15 2022
Citation
P. Pradel, T. de Rességuier, F. Malaise, M. P. Olbinado, A. Rack, J. Grenzer, D. Loison, L. Berthe; In situ radiographic and ex situ tomographic investigation of pore collapse in laser shock-loaded polyurethane foam. J. Appl. Phys. 7 February 2022; 131 (5): 055106. https://doi.org/10.1063/5.0077613
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