The influence of pressure on the large deformation shear response of a Polyurea
- Creators
- Alkhader, Maen
- Knauss, W. G.
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Ravichandran, G.
- Other:
- Proulx, Tom
Abstract
A new shear-compression experiment is developed to characterize the influence of hydrostatic pressure on the shear constitutive response of nearly incompressible viscoelastic materials undergoing large deformations. In this design, a uniform torsional shear stress is superposed on a uniform hydrostatic compressive state of stress generated by axially deforming samples confined by a stack of thin steel disks. The new design is effective in applying uniform multiaxial compressive strain while preventing buckling and barreling during inelastic deformation. In addition, it allows for the direct measurement of the stress and strain fields during the deformation history. The new shear-compression setup is developed to aid in characterizing the influence of pressure or negative dilatation on the shear constitutive response of viscoelastic materials in general and Polyurea in particular. Experimental results obtained with this technique illustrate the significant increase in the shear stiffness of polyurea under moderate to high hydrostatic pressures.
Additional Information
© 2010 Society for Experimental Mechanics Inc. First Online: 15 April 2011. The authors wish to thank Dr. Roshdy Barsoum of the Office of Naval Research through his guidance and cooperation and for the sustained support of this difficult effort under Grant ONR N000 14-09-1-0552.Additional details
- Eprint ID
- 103623
- Resolver ID
- CaltechAUTHORS:20200601-143119734
- N000 14-09-1-0552
- Office of Naval Research (ONR)
- Created
-
2020-06-01Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field
- Caltech groups
- GALCIT
- Series Name
- Conference Proceedings of the Society for Experimental Mechanics Series