Abstract
Ballistic impact onto fiber-based armor systems induce high strain rate (HSR) multiaxial loading including axial tension, axial compression, transverse compression and transverse shear. Fiber failure during impact is expected to occur under multiaxial loading conditions. The transverse compressive deformation induced in the fibers during impact is significant enough to cause permanent deformation (shear cutting and compressive fibrillation) at the sub-micron length scales. However, the influence of high strain rate transverse damage from compression and/or shear on the tensile strength of fibers is not well understood. In this study, ultrahigh molecular weight polyethyelene (UHMWPE) Dyneema SK76 single fibers are compressed at HSR loading conditions in a unique small (283 μm) diameter Kolsky bar. Subsequently, the compressed fibers are subjected to axial tension at quasi-static and HSR loading to understand the influence of transverse compression.
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Acknowledgements
Research was sponsored by the Oak Ridge Institute for Science and Education, which is managed by Oak Ridge Associated Universities. Equipment, facilities, and training were provided by the Army Research Laboratory at Aberdeen Proving Ground, Maryland. Procedural design and initial experimentation is performed by Mr. Elvis Budelkhandi of the University of South Carolina. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Laboratory or the U.S. Government. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation herein. The author JWG wish to acknowledge the funding from the ARL MEDE program.
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Thomas, F.D., Casem, D., Weerasooriya, T., Sockalingam, S., Gillespie, J.W. (2019). Influence of High Strain Rate Transverse Compression on the Tensile Strength of Polyethylene Ballistic Single Fibers. In: Kimberley, J., Lamberson, L., Mates, S. (eds) Dynamic Behavior of Materials, Volume 1. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-95089-1_62
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DOI: https://doi.org/10.1007/978-3-319-95089-1_62
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