The Dynamic Compressive Response of an Open-Cell Foam Impregnated With a Non-Newtonian Fluid
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Gibson-2009-Dynamic Compressive.pdf
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Author(s)
Dawson, Matthew A.
McKinley, Gareth H.
Gibson, Lorna
Date Issued
November 2009
Journal
Journal of Applied Mechanics
Publisher
American Society of Mechanical Engineers
Citation
Dawson, M. A., G. H. McKinley, and L. J. Gibson. “The Dynamic Compressive Response of an Open-Cell Foam Impregnated With a Non-Newtonian Fluid.” Journal of Applied Mechanics 76 (2009): 061011.©2009 American Society of Mechanical Engineers.
Version
Final published version
Abstract
The response of a reticulated, elastomeric foam filled with colloidal silica under dynamic compression is studied. Under compression beyond local strain rates on the order of 1 s[superscript −1], the non-Newtonian, colloidal silica-based fluid undergoes dramatic shear thickening and then proceeds to shear thinning. In this regime, the viscosity of the fluid is large enough that the contribution of the foam and the fluid-structure interaction to the stress response of the fluid-filled foam can be neglected. An analytically tractable lubrication model for the stress-strain response of a non-Newtonian fluid-filled, reticulated, elastomeric foam under dynamic compression between two parallel plates at varying instantaneous strain rates is developed. The resulting lubrication model is applicable when the dimension of the foam in the direction of fluid flow (radial) is much greater than that in the direction of loading (axial). The model is found to describe experimental data well for a range of radius to height ratios (~1–4) and instantaneous strain rates of the foam (1 s[superscript −1] to 4×10[superscript 2] s[superscript −1]). The applicability of this model is discussed and the range of instantaneous strain rates of the foam over which it is valid is presented. Furthermore, the utility of this model is discussed with respect to the design and development of energy absorption and blast wave protection equipment.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1115/1.3130825
