Abstract
Dynamic compressive behavior of a clay obtained from Boulder, Colorado was investigated on a 24.4 m split Hopkinson pressure bar. The as-received clay was first pulverized into powders, which were subsequently dried in oven at 105 °C for 2 weeks, and then sieved to collect powers with dimensions smaller than #50 (0.3 mm) using ASTM E-11 standard sieves. The sorted clay was compressed inside a hardened steel tube, by a tungsten carbide rod at one end in contact with the incident bar, and a brass rod at the other end in contact with the transmission bar. This assembly was subjected to repetitive shaking to consolidate the soil to attain a desired bulk mass density; it is then placed between the incident steel bar and the transmission aluminum bar for dynamic compression. Through measurements of both axial and transverse responses of the cylindrical clay specimens under confinement, both volumetric and deviatoric responses were determined under the 3D stress state involved. Both dry and moist clay specimens were characterized at high strain rates. The effect of moisture content on the compressive behavior was investigated. The compressibility as a function of axial stress was determined.
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Acknowledgment
We acknowledge the support of ONR MURI grant N00014-11-1-0691 and DOE NEUP grant 09-818, NSF ECCS-1307997. Lu Also acknowledges the Louis A. Beecherl Jr. Chair for additional support.
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Luo, H., Hu, Z., Xu, T., Lu, H. (2017). High-Strain Rate Compressive Behavior of a Clay Under Uniaxial Strain State. In: Casem, D., Lamberson, L., Kimberley, J. (eds) Dynamic Behavior of Materials, Volume 1. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-41132-3_16
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DOI: https://doi.org/10.1007/978-3-319-41132-3_16
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