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Dynamic Constitutive Behavior of Reinforced Hydrogels inside Liquid Environment

  • Sashank Padamati
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

Dynamic compressive behavior of three different types of hydrogels used for soft tissue applications are tested using a modified split Hopkinson pressure bar. Three kinds of hydrogels: (a) plain epoxy hydrogels, (b) epoxy hydrogels reinforced with three-dimensional polyurethane fibers and (c) fumed silica nano particles reinforced hydrogels with different cross linking densities are considered in this study. The three dimensional pattern of the fibers are generated by a rapid robo-casting technique. A pulse shaping technique is used to increase the rising time of the incident pulse to obtain dynamic stress equilibrium. A novel liquid environment technique was implemented to observe the dynamic behavior of hydrogels when immersed in water. Experiments are carried out for different strain rates with and without water environment. Preliminary results show that the yield strength of these hydrogels decreases when they are immersed in water.

Keywords

Fumed Silica Photo Polymerization Fumed Silica Particle Pulse Shaping Technique Polyurethane Fiber 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

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    Metters AT, and Lin CC, Biodegradable Hydro gels: Tailoring Properties and Function through Chemistry and Structure, Biomaterials, Wong JY, and Bronzino JD, Eds. NY: CRC Press, 5.1-5.44, 2007Google Scholar
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    Yang, Shukui L, Lili Y, Dongmei H and Fuchi W: Dynamic compressive properties and failure mechanism of glass fiber reinforced silica hydrogel, Material Science and Engineering., 824–827, 2010Google Scholar
  3. 3.
    Kolsky, H:, An investigation of mechanical properties of materials at very high strain rates of loadings, Proceedings of the Physical Society of London, B62, 676–700, 1949.Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Sashank Padamati
    • 1
  1. 1.University of Massachusetts DartmouthNorth DartmouthUSA

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