Abstract
The primary objective of this research is to investigate, through fundamental experiments, the dynamic multiaxial deformation, failure and strength degradation mechanisms that govern individual ballistic fiber failure. Predicting ballistic impact performance of armor systems requires an understanding of fiber failure under complex multiaxial loading conditions. This study examines the failure behavior of ultrahigh molecular weight polyethylene (UHMWPE) Dyneema® SK76 single fibers under dynamic transverse impact as a function of varying loading rates and projectile geometry. A novel single fiber transverse impact experiment is developed by modifying the Kolsky bar to characterize failure of fibers to create the foundation for a failure model. Experiments are performed with load cells at the fiber ends and with high speed imaging for determining average stresses and strains. Post-test microscopy imaging of failure surfaces are compared to determine the dominant fiber failure modes for each experimental group.
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Acknowledgments
Research funding was provided through Oak Ridge Associated Universities. Equipment and facilities were provided by the Army Research Laboratory at Aberdeen Proving Ground, Maryland. The views and conclusions contained in this document are those of theauthors and should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Laboratory or the US Government. The US Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation herein.
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Thomas, F.D., Alexander, S.L., Gunnarsson, C.A., Weerasooriya, T., Sockalingam, S. (2021). Influence of Dynamic Multiaxial Transverse Loading on Dyneema® SK76 Single Fiber Failure. In: Xia, S., Beese, A., Berke, R.B. (eds) Fracture, Fatigue, Failure and Damage Evolution , Volume 3. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-030-60959-7_14
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DOI: https://doi.org/10.1007/978-3-030-60959-7_14
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