DYMAT 2009
Volume 1, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 201 - 206
Section Experimental Techniques
Published online 15 September 2009
DYMAT 2009 (2009) 201-206
DOI: 10.1051/dymat/2009027

Response of moist sand to high rate loading

B. Martin1 and W. Chen2

1  Air Force Research Laboratory, Eglin AFB, FL 32542, USA
2  Purdue University, West Lafayette, IN 47907, USA

Published online: 15 September 2009

The dynamic response of sand has predominately been characterized at dry and saturated conditions, but much less studied at moist or partially saturated conditions. This work is to aid in better understanding the dynamic behavior of partially saturated sand. In particular, the effects of moisture on the dynamic behavior of poorly graded, silica based sand are explored using a modified Kolsky bar. A controlled loading pulse (pulse shaping) allowed the sample to acquire stress equilibrium and a constant strain-rate. The experiments were conducted at strain-rates of 900 s−1 and 1500 s−1 with the sand specimen passively confined in a hardened steel tube. The sand has a dry density of 1.50 g/cm3 with its moisture contents varying from 0% to 9% by weight. Experimental results indicate that partially saturated sand is more compliant than dry sand. The softening of the partially saturated sand may occur due to the pore water acting as a lubricant between the sand particles.

© EDP Sciences 2009