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Tensile Behavior of Kevlar 49 Woven Fabrics over a Wide Range of Strain Rates

  • Jeremy D. Seidt
  • Thomas A. Matrka
  • Amos Gilat
  • Gabriel B. McDonald
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

Kevlar and other ballistic fabrics are frequently used in dynamic loading applications such as personnel protective equipment (armor) and soft engine containment systems for fan blade out events in aircraft engines. Numerical simulations of these events require constitutive models that are based on mechanical experiments that approximate the load conditions present in the application. Kevlar 49 fabric is tested in tension at strain rates ranging from 10-4 to 1500 s-1. A servohydraulic load frame is used for low strain rate experiments up to 1 s-1. Experiments at strain rates above 400 s-1 are conducted on a direct-tension split Hopkinson bar apparatus. 3D digital image correlation is used to measure specimen surface displacements and strains.

Keywords

Digital Image Correlation Federal Aviation Administration Single Yarn Grip Motion Transverse Yarn 
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.

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References

  1. 1.
    LSTC, LS-DYNA Keyword User’s Manual, Volumes I and II, Version 971, Livermore Software Technology Center (LSTC), Livermore, CA, 2007.Google Scholar
  2. 2.
    Carney, K., Pereira, M., Revilock, D., Matheny, P., “Jet Engine Fan Blade Containment using Two Alternate Geometries”, Proceedings of the 4 th European LS-DYNA Users Conference, Ulm, Germany, May, 2003.Google Scholar
  3. 3.
    Naik, D., Sankaran, S., Mobasher, B., Rajan, S.D., Pereira, J.M., “Development of Reliable Modeling Methodologies for Fan Blade Out Containment Analysis – Part I: Experimental Studies”, International Journal of Impact Engineering, Vol. 36, 2009, pp 1–11.CrossRefGoogle Scholar
  4. 4.
    Johnson, G.R., Cook, W.H., “A Constitutive Model and Data for Metals Subjected to Large Strains, High Strain Rates and High Temperatures”, Proceedings of the 7th International Symposium on Ballistics, The Hague, The Netherlands, April 1983.Google Scholar
  5. 5.
    Johnson, G.R., Cook, W.H., “Fracture Characteristics of Three Metals Subjected to Various Strains, Strain Rates, Temperatures and Pressures”, Engineering Fracture Mechanics, Vol. 21, 1985, pp31-48.CrossRefGoogle Scholar
  6. 6.
    Steinberg, D.J., Cochran, S.G., Guinan, M.W., “Constitutive Model for Metals Applicable at High Strain Rate”, Journal of Applied Physics, Vol. 51, 1980, pp1498-1504.CrossRefGoogle Scholar
  7. 7.
    Zerilli, F.J.; Armstrong, R.W. “Dislocation-Mechanics-Based Constitutive Relations for Material Dynamics Calculations.” Journal of Applied Physics, Vol. 61, 1987, pp1816–1825.Google Scholar
  8. 8.
    Stahlecker, Z., Mobasher, B., Rajan, S.D., Pereira, J.M., “Development of Reliable Modeling Methodologies for Fan Blade Out Containment Analysis – Part II: Finite Element Analysis”, International Journal of Impact Engineering, Vol. 36, 2009, pp 447–459.CrossRefGoogle Scholar
  9. 9.
    Bansal, S., Mobasher, B., Rajan, S.D., Vintilescu, I., “Development of Fabric Constitutive Behavior for Use in Modeling Engine Fan Blade-Out Events”, Journal of Aerospace Engineering, Vol. 22, 2009, pp249-259.CrossRefGoogle Scholar
  10. 10.
    Wang. Y., Xia, Y., “The Effects of Strain Rate on the Mechanical Behaviour of Kevlar Fibre Bundles: an Experimental and Theoretical Study”, Composites: Part A, Vol. 29, 1998, pp1411-1415.Google Scholar
  11. 11.
    Cheng, M., Chen, W., Weerasooriya, T., “Mechanical Properties of Kevlar KM2 Single Fiber”, Journal of Engineering Materials and Technology, Vol. 127, 2005, pp197-203.CrossRefGoogle Scholar
  12. 12.
    Tan, V.B.C., Zeng, X.S., Shim, V.P.W., “Characterization and Constitutive Modeling of Aramid Fibers at High Strain Rates”, International Journal of Impact Engineering, Vol. 35, 2008, pp1303-1313.CrossRefGoogle Scholar
  13. 13.
    Zhu, D., Mobasher, B., Rajan, S.D., “Experimental Study of Dynamic Behavior of Kevlar 49 Single Yarn”, Proceedings of the SEM Annual Conference, Indianapolis, IN, 2010.Google Scholar
  14. 14.
    Shim, V.P.W., Lim, C.T., Foo, K.J., “Dynamic Mechanical Properties of Fabric Armour”, International Journal of Impact Engineering, Vol. 25, 2001, pp1-15.CrossRefGoogle Scholar
  15. 15.
    Sutton, M., Orteu, J.-J., Schreier, H.W., Image Correlation for Shape, Motion and Deformation Measurements, Springer, New York, NY, 2009.Google Scholar
  16. 16.
    Staab, G. H., Gilat, A., “A Direct-Tension Split Hopkinson Bar for High Strain-Rate Testing”, Experimental Mechanics, Vol. 31, 1991, pp 232–235.CrossRefGoogle Scholar

Copyright information

© The Society for Experimental Mechanics, Inc. 2011

Authors and Affiliations

  • Jeremy D. Seidt
    • 1
  • Thomas A. Matrka
    • 1
  • Amos Gilat
    • 1
    • 2
  • Gabriel B. McDonald
    • 1
  1. 1.Department of and Mechanical and Aerospace EngineeringThe Ohio State UniversityOhioUSA
  2. 2.Scott LaboratoryColumbusUSA

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