Abstract
A set of dynamic triaxial compression experiments at 50, 100, and 200 MPa confinement have been conducted with a modified Kolsky bar on cylindrical ultra-high strength concrete Cor-Tuf specimens of diameter 19 mm and length of 12.7 mm. The modified Kolsky bar utilized is capable of performing a triaxial compression test with a dynamic loading for a confining pressure of up to 400 MPa on specimens with 19.05 mm diameters. The experiment is composed of a hydrostatic phase which occurs at a quasi-static strain rate followed by a dynamic shear phase which occurs at a high strain rate. A set of 28 experiments were conducted at strain rates of 100 and 200 s−1. The experiments show that the fracture strength of the material increases under increasing pressure. The specimens showed higher strength in the dynamic confined experiments than both the quasi-static TXC experiments and the unconfined-uniaxial dynamic tests. The strength increase was in part caused by specimen size difference. Although the trend towards brittle ductile transition is observed the specimens were not loaded in a high enough confinement for the phase change to occur.
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Acknowledgment
This research was supported by a contract from ERDC to Purdue University. Boon-Him Lim provided the unconfied dynamic Cor-Tuf results included in this paper.
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© 2014 The Society for Experimental Mechanics, Inc.
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Mondal, A.B., Chen, W., Martin, B., Heard, W. (2014). Dynamic Triaxial Compression Experiments on Cor-Tuf Specimens. In: Song, B., Casem, D., Kimberley, J. (eds) Dynamic Behavior of Materials, Volume 1. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-00771-7_30
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DOI: https://doi.org/10.1007/978-3-319-00771-7_30
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