Dynamic Tensile Testing of Kevlar 49 Fabrics
Publication: Journal of Materials in Civil Engineering
Volume 23, Issue 3
Abstract
Measurement of deformation history during a high-speed mechanical test plays an important role in establishing the dynamic behavior of materials. Traditional strain measuring techniques such as extensometers and strain gauges have limitations such as frequency response and range of strain. Kevlar 49 fabrics were tested in tension within a strain-rate range of 25 to using a high-speed servohydraulic testing system. Results show that the dynamic material properties in terms of Young’s modulus, tensile strength, maximum strain, and toughness increase with increasing strain rate. The woven nature of Kevlar 49 fabric results in large displacements and shape changes during tests. Noncontacting strain measuring technique is therefore highly preferred. A technique was developed using image analysis to obtain the deformation of Kevlar 49 fabrics at the tested strain rates. Using image analysis results, the stress-strain curves of Kevlar 49 fabrics at different strain rates were constructed and compared with those based on stroke measurement. Good agreement was obtained between these two methods.
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Acknowledgments
This work was supported by the Federal Aviation Administration’s Airworthiness Assurance Center of ExcellenceFAA and with additional support from the Aircraft Catastrophic Failure Prevention Program. The authors would like to acknowledge use of facilities within the Center for Solid State Science at Arizona State University for the SEM images.
References
Ahmet, H. A., Murat, G., and Tuncer, B. E. (2004). “Use of image analysis in determination of strain distribution during geosynthetic tensile testing.” J. Comput. Civ. Eng., 18(1), 65–74.
Amaniampong, G., and Burgoyne, C. J. (1994). “Statistical variability in the strength and failure strain of aramid and polyester yarns.” J. Mater. Sci., 29(19), 5141–5152.
Anwander, M., Zagar, B. G., Weiss, B., and Weiss, H. (2000). “Non-contacting strain measurements at high temperatures by the digital laser speckle technique.” Exp. Mech., 40(1), 98–105.
Bastias, P. C., Kulkarni, S. M., Kim, K. Y., and Gargas, J. (1996). “Non-contacting strain measurements during tensile tests.” Exp. Mech., 36(1), 78–83.
Benloulo, I. S. C., Rodriguez, J., Martinez, M. A., and Galevz, V. S. (1997). “Dynamic tensile testing of aramid and polyethylene fiber composites.” Int. J. Impact Eng., 19(2), 135–146.
Borsutzki, M., Cornette, D., Kuriyama, Y., Uenishi, A., Yan, B., and Opbroek, E. (2005). “Recommended practice for dynamic tensile testing for sheet steels.” Int. Iron and Steel Institute: High Strain Rate Experts Group. 〈http://www.worldautosteel.org/uploaded/DynTestingRecomPract.pdf〉.
Bruce, D. M., Matlock, D. K., Speer, J. G., and De, A. K. (2004). “Assessment of the strain-rate dependent tensile properties of automotive sheet steels.” SAE, 0507.
Chen, W., Zhang, B., and Forestal, M. J. (1999). “A split Hopkinson pressure bar technique for low-impedance materials.” Exp. Mech., 39(2), 81–85.
Cheng, M., Chen, W., Weerasooriya, T. (2005). “Mechanical properties of Kevlar KM2 single fiber.” J. Eng. Mater. Technol., 127(2), 197–204.
Choi, D., Thorpe, L., and Hanna, R. B. (1991). “Image analysis to measure strain in wood and paper.” Wood Sci. Technol., 25(4), 251–262.
Farsi, D. B., Nemes, J. A., and Bolduc, M. (2006). “Study of parameters affecting the strength of yarns.” J. Phys. IV, 134, 1183–1188.
Fitoussi, J., Meraghni, F., Jendli, Z., Hug, G., and Baptiste, D. (2005). “Experimental methodology for high strain rates tensile behavior analysis of polymer matrix composites.” Compos. Sci. Technol., 65(14), 2174–2188.
Frew, D. J., Forrestal, M. J., and Chen, W. (2001). “A split Hopkinson pressure bar technique to determine compressive stress-strain data for rock materials.” Exp. Mech., 41(1), 40–46.
Gray, G. T. (2000). “Classic split-Hopkinson pressure bar testing.” Mechanical testing and evaluation handbook. Vol. 8, American Society for Metals, Materials Park, OH, 488–496.
Hercher, M., Wyntjes, G., and DeWeerd, H. (1987). “Non-contact laser extensometer.” Proc. SPIE, Industrial Laser Interferometry, 746, 185–191.
Hill, S. I. (2004). “Standardization of high strain rate test techniques for automotive plastics project.” UDRI: Structural Test Group, UDR-TR-2004-00016.
Hill, S., and Sjöblom, P. (1998). “Practical considerations in determining high strain rate material properties.” SAE 981136.
ISO. (2003). “Plastics—determination of tensile properties at high strain rates.” ISO/CD 18872 (draft).
James, F. B. (1967). “On the direct measurement of very large strain at high strain rate.” Exp. Mech., 7(1), 8–14.
Johnstrone, C., and Ruiz, C. (1995). “Dynamic testing of ceramics under tensile stress.” Int. J. Solids Struct., 32(17), 2647–2656.
Kenneth, G. H. (1966). “Influence of strain rate on mechanical properties of 6061-T6 aluminum under uniaxial and biaxial states of stress.” Exp. Mech., 6(4), 204–211.
MATLAB (R2009b) [Computer software]. Natick, MA, The MathWorks, Inc. 〈http://www.mathworks.com/products/matlab/〉.
Meyers, M. A. (1994). Dynamic behavior of materials,Wiley, New York.
Nicholas, T. (1981). “Tensile testing of material at high rates of strain.” Exp. Mech., 21(5), 177–185.
Rajan, S. D., Mobasher, B., Sharda, J., and Deenadayalu, C. (2004). “Explicit finite element analysis modeling of multilayer composite fabric for gas turbine engines containment systems. Part 1: Static tests and modeling.” Final Rep.: DOT/FAA/AR-04/40, P1 Office of Aviation Research, Washington, DC.
SAE (2008). “High strain rate tensile testing of polymers.” J2749, Warrendale, PA. 〈http://standards.sae.org/j2749_200811〉.
Schwartz, P., Wagner, H. D., and Phoenix, S. L. (1984). “A study of statistical variability in the strength of single aramid filaments.” J. Compos. Mater., 18(4), 312–338.
Sharda, J. (2004). “Mechanical testing and finite element analysis of fabrics for engine containment systems.” M.S. thesis, Dept. of Civil and Environmental Engineering, Arizona State Univ., Tempe, AZ.
Sharda, J., Deenadayalu, C., Mobasher, B., and Rajan, S. D. (2006). “Modeling of multi-layer composite fabrics for gas turbine engine containment systems.” J. Aerosp. Eng., 19(1), 38–45.
Silva, F., Zhu, D., Soranakom, C., Mobasher, B., and Toledo, F. R. (2010). “High speed tensile behavior of sisal fiber cement composites.” Mater. Sci. Eng. A, 527(3), 544–552.
Verleysen, P., and Degrieck, J. (2004). “Optical measurement of the specimen deformation at high strain rate.” Exp. Mech., 44(3), 247–252.
Wagner, H. D., Aronhime, J., and Marom, G. (1990). “Dependence of thetensile strength of pitch-based carbon and para-aramid fibers on the rate of strain.” Proc. R. Soc. London A, 428(1875), 493–510.
Wang, Y., and Xia, Y. (1998). “The effects of strain rate on the mechanical behavior of Kevlar fiber bundles: An experimental and theoretical study.” Compos. Part A, 29(11), 1411–1415.
Xiao, X. R. (2008). “Dynamic tensile testing of plastic materials.” Polym. Test., 27(2), 164–178.
Zabotkin, K., O’Toole, B., and Trabia, M. (2003). “Identification of the dynamic properties of materials under moderate strain rates.” 16th ASCE Engineering Mechanics Conf., Seattle.
Zhu, D., Gencoglu, M., and Mobasher, B. (2009). “Low velocity impact behavior of AR-glass fabric reinforced cement composites in flexure.” Cem. Concr. Compos., 31(6), 379–387.
Zhu, D., Mobasher, B., and Rajan, S. D. (2008a). “High strain rate testing of Kevlar 49 fabric.” Society for Experimental Mechanics, 11th Int. Congress and Exhibition on Experimental and Applied Mechanics, 1, 34–35.
Zhu, D., Mobasher, B., and Rajan, S. D. (2008b). “Image analysis of Kevlar 49 fabric at high strain rate.” Society for Experimental Mechanics, 11th Int. Congress and Exhibition on Experimental and Applied Mechanics, 2, 986–991.
Zhu, D., Peled, A., and Mobasher, B. (2011). “Dynamic tensile testing of fabric-cement composites.” Constr. Build. Mater., 25(1), 385–395.
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Information
Published In
Journal of Materials in Civil Engineering
Volume 23 • Issue 3 • March 2011
Pages: 230 - 239
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Oct 16, 2008
Accepted: Jul 4, 2010
Published online: Jul 29, 2010
Published in print: Mar 1, 2011
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