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.
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References
Lee, g., Mock, W., Feddrly, J., Drotar, J., Balizer, E., Conner, M., “The effect of mechanical deformation on the glass transition temperature of polyurea.” Schok Compression of Condensed Matter, CP955,( 2007).
Amini, M., Issacs, J., Nemat-Nasser, S.,“ Effect of Polyurea on the dynamic response of steel plates.” Proceedings of the 2006 SEM annual conference and exposition on experimental and applied mechanics. St, Louis, MO, (2006).
[3]Bahei-El-Din, Y., Dvorak, G., Fredricksen, O.,“ A blast-tolerant sandwich plate design with a polyurea interlayer.” Int. J. of Solids and Structrues, 43, 7644–7658, (2006)
[4]Losi., G., Knauss, W., “Free Volume Theory and Nonlinear Thermoviscoelasticity.” Polymer engineering and science, Vol 32, 8. (1992)
[5]Tschoegel, N., Knauss, W., Emri, I., “The effect of temperature and pressure on the mechanical properties of themo- and/or Piezorheologically simple polymeric materials in thermodynamic equilibrium- A critical review.” Mechanics of Time-Dependent Materials, 6, 53–99, (2002).
Jiao, T., Clifton, R., Grunschel, S., “ Pressure-sensitivity and tensile strength of an elastomer at high strain rates.” Shock compression of condensed matter. CP955, ( 2007).
Amirkhize, A., Isaacs, Mcgee, J., Nemat-Nasser, S., “An experimentally-based viscoelastic constitutive model for Polyurea, including pressure and temperature effects. Philosophical magazine, Vol 86, 36, 5847–5866,( 2006).
Ma, Z., Ravi-Chandar, K.,” Confined compression: A stable homogeneous deformation for constitutive characterization.” SEM, Vol 40, 1,( 2000).
Qvale, D., Ravi-Chandar K., “Viscoelastic characterization of polymers under multiaxial compression.” Mechanics of time-dependent materials, 8, 193–214, (2004).
Chakkarapani, V., Ravi-Chandar, K., Liechti, K., “Characterization of multiaxial constitutive properties of rubbery polymers.” Journal of engineering materials and technology, vol 128, 489–494, (2006).
Zhao, J., Knauss, W., Ravichandran, G., “ Applicability of the time-temperature superposition principle in modeling dynamic response of Polyurea.” Mechanics of Time dependent materials, 11:289–308, (2007).
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Alkhader, M., Knauss, W.G., Ravichandran, G. (2011). The influence of pressure on the large deformation shear response of a Polyurea. In: Proulx, T. (eds) Time Dependent Constitutive Behavior and Fracture/Failure Processes, Volume 3. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-9794-4_40
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DOI: https://doi.org/10.1007/978-1-4419-9794-4_40
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