The multi-sleeve friction penetration system is an in-situ testing device that is derived from the well established cone penetration test. It incorporates a series of friction sleeves with varying surface texture in addition to the standard smooth friction sleeve located directly beneath the tip. The multiple measurements made with this device allow it to provide new insight into soil type and stratigraphic variations as well as in-situ shear strengths as a function of sleeve texture height. This paper describes a next generation version of this device that incorporates torsional load sensing capabilities in addition to the standard axial load sensing capabilities. In this manner, the effects of different vertical and horizontal stress states on measured sleeve stresses can be explored. This device offers significant benefits as an alternative to the portable bevameter, which was used in the past to measure the mechanical response of lunar soils under normal and shear loading conditions that were likely to be imposed by various wheel and track systems.
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