Transverse impact response of a linear elastic Kevlar® KM2 fiber yarn was determined at various striking speeds from Hopkinson bar and gas gun experiments incorporated with high-speed photography techniques. Upon transverse impact, a triangle shape was formed in the fiber yarn. Both longitudinal and transverse waves were produced and propagated outwards the fiber yarn. Both the angle of the triangle and Euler transverse wave speed vary with striking speeds. The relationship between the Euler transverse wave speed and the striking speed was determined. The transverse impact response of the fiber yarn was also analyzed with a model, which agrees well with the experimental results. The model shows that the longitudinal wave speed is critical in the ballistic performance of the fiber yarn. At a certain striking speed, a higher longitudinal wave speed produces a higher Euler transverse wave speed, enabling us to spread the load and dissipate the impact energy faster, such that the ballistic performance of the fiber yarn is improved.
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September 2011
Research Papers
Transverse Impact Response of a Linear Elastic Ballistic Fiber Yarn
Bo Song,
Bo Song
Sandia National Laboratories
, Livermore, CA 94551
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Hwun Park,
Hwun Park
School of Aeronautics and Astronautics,
Purdue University
, West Lafayette, IN 47907
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Wei-Yang Lu,
Wei-Yang Lu
Sandia National Laboratories
, Livermore, CA 94551
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Weinong Chen
Weinong Chen
School of Aeronautics and Astronautics,
Purdue University
, West Lafayette, IN 47907
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Bo Song
Sandia National Laboratories
, Livermore, CA 94551
Hwun Park
School of Aeronautics and Astronautics,
Purdue University
, West Lafayette, IN 47907
Wei-Yang Lu
Sandia National Laboratories
, Livermore, CA 94551
Weinong Chen
School of Aeronautics and Astronautics,
Purdue University
, West Lafayette, IN 47907J. Appl. Mech. Sep 2011, 78(5): 051023 (9 pages)
Published Online: August 10, 2011
Article history
Received:
November 22, 2010
Accepted:
March 15, 2011
Online:
August 10, 2011
Published:
August 10, 2011
Citation
Song, B., Park, H., Lu, W., and Chen, W. (August 10, 2011). "Transverse Impact Response of a Linear Elastic Ballistic Fiber Yarn." ASME. J. Appl. Mech. September 2011; 78(5): 051023. https://doi.org/10.1115/1.4004310
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