Bibliographic Citation
| Document |  0 K |
|---|---|
| Title | Linear and Nonlinear Ultrasonic Properties of Granular Soils |
| Creator/Author | Bonner, B. ; Berge, P.A. ; Aracne-Ruddle, C.M. ; Bertete-Auguirre, H. ; Wildenschild, D. ; Trombino, C.N. ; Hardy, E. |
| Publication Date | 2000 Apr 20 |
| OSTI Identifier | OSTI ID: 791377 |
| Report Number(s) | UCRL-JC-136207 |
| DOE Contract Number | W-7405-Eng-48 |
| Other Number(s) | TRN: US200206%%30 |
| Resource Type | Conference |
| Resource Relation | Conference: Materials Research Society Meeting, San Francisco, CA (US), 04/24/2000--04/28/2000; Other Information: PBD: 20 Apr 2000 |
| Research Org | Lawrence Livermore National Lab., CA (US) |
| Sponsoring Org | USDOE Office of Defense Programs (DP) (US) |
| Subject | 58 GEOSCIENCES; 36 MATERIALS SCIENCE; CELLULOSE; CLAYS; MIXTURES; PEAT; QUARTZ; SAND; SHEAR PROPERTIES; SOILS; STRESSES; SWELLING; ULTRASONIC TESTING; SEISMIC P WAVES; SEISMIC S WAVES |
| Description/Abstract | The ultrasonic pulse transmission method (100-500 kHz) was adapted to measure compressional (P) and shear (S) wave velocities for synthetic soils fabricated from quartz-clay and quartz-peat mixtures. Velocities were determined as samples were loaded by small (up to 0.1 MPa) uniaxial stress to determine how stress at grain contacts affects ave amplitudes, velocities, and frequency content. Samples were fabricated from quartz sand mixed with either a swelling clay or peat (natural cellulose). P velocities in these dry synthetic soil samples were low, ranging from about 230 to 430 m/s for pure sand, about 91 to 420 m/s for sand-peat mixtures, and about 230 to 470 m/s for dry sand-clay mixtures. S velocities were about half of the P velocity in most cases, about 130 to 250 m/s for pure sand, about 75-220 m/s for sand-peat mixtures, and about 88-220 m/s for dry sand-clay mixtures. These experiments demonstrate that P and S velocities are sensitive to the amount and type of admixed second phase at low concentrations. They found that dramatic increases in all velocities occur with small uniaxial loads, indicating strong nonlinearity of the acoustic properties. Composition and grain packing contribute to the mechanical response at grain contacts and the nonlinear response at low stresses. |
| Country of Publication | United States |
| Language | English |
| Format | Medium: ED; Size: 221 Kilobytes pages |
| System Entry Date | 2008 Feb 05 |
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Last Updated: 11/19/2009