Soils as samples for the split Hopkinson bar
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 Laboratory (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6164579
- Report Number(s):
- LA-UR-84-4024; CONF-850466-2; ON: DE85005559
- Resource Relation:
- Conference: 2. symposium on the interaction of non-nuclear munitions with structures, Panama City, FL, USA, 15 Apr 1985; Other Information: Paper copy only, copy does not permit microfiche production
- Country of Publication:
- United States
- Language:
- English
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