PROCEDURES FOR PREDICTION OF GROUND SHOCK PHENOMENA BASED ON ONE-DIMENSIONAL SHOCK PROPAGATION CONSIDERATIONS. REPORT 1. PROCEDURES AND APPLICATIONS
The report demonstrates procedures for computing stress and motion histories in soil. Simplified geometries are employed. The procedures have application to analysis of nuclear weapon loadings. The methods are based on the conservation laws of mass and momentum and dynamic material properties in the...
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| Format: | Text |
| Language: | English |
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1967
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| Online Access: | http://www.dtic.mil/docs/citations/AD0664121 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0664121 |
| Summary: | The report demonstrates procedures for computing stress and motion histories in soil. Simplified geometries are employed. The procedures have application to analysis of nuclear weapon loadings. The methods are based on the conservation laws of mass and momentum and dynamic material properties in the form of propagation velocities characteristic of shock waves in the compacting medium and sound waves in the compacted medium. The procedures deal with soil models composed of all nonlinear loading branch forms for which stress-strain (sigma-epsilon) behavior is described by the relationship the 2nd derivative Sigma with respect to epsilon > 0 (strain-hardening type of response) and all linear unloading branch forms. Input data required consists of laboratory uniaxial (constrained) compression or wave-propagation test data and an applied pressure-time profile. The procedure has been validated by comparison with closed-form solutions and applied to analyze test data in the literature obtained from laboratory and field. Application of the procedure to other than one-dimensional problems is indicated (e.g., a HEST test is analyzed). (Author) |
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