Soils as samples for the split Hopkinson bar

Conference · Tue Jan 01 04:00:00 EST 1985

OSTI ID:6164579

Gaffney, E S; Brown, J A; Felice, C W

Soils frequently exhibit one or more of the following characteristics which complicadte analysis of data from split Hopkinson bar tests or make test setup and execution difficult: low wave speed, high attenuation of acoustic energy, or insignificant structural strength. Low wave speed invalidates the assumption that the sample is deformed uniformly by the load at early times; but, use of a Lagrangian wave propagation analysis permits derivation of useful information from the standard suite of data. Use of gauges within the sample would facilitate this technique. High attenuation requires thin samples, which restricts the strain paths which can be achieved. The weakness of noncohesive soils presents difficulties in preparation, handling and control of boundary conditions. One simple solution is to support the sample in a rigid sleeve; this results in a uniaxial strain experiment so that the results are directly comparable to shock wave data. 10 references, 7 figures.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6164579
• Report Number(s): LA-UR-84-4024; CONF-850466-2; ON: DE85005559
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580300* -- Mineralogy
Petrology
& Rock Mechanics-- (-1989)
MATERIALS TESTING
MECHANICAL PROPERTIES
SAMPLE PREPARATION
SAMPLING
SOILS
TESTING