Download or read book Procedures for Prediction of Ground Shock Phenomena Based on One dimensional Shock Propagation Considerations written by James V. Zaccor and published by . This book was released on 1967 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report describes a definitive experimental study in which shock-induced square-wave pulses in soil were observed to give way to decaying pulse shapes, as in a gas shock tube, and rapid attenuation of peak stress occurred thereafter due to nonlinear propagation in the rarefaction. In the study three different duration pulses were applied to an 8-ft vertical column of granular material confined under boundary conditions leading to a stress-strain (Sigma - Epsilon) behavior described by d to the 2nd power Sigma/d Epsilon to the 2nd power> 0, i.e., a strain-hardening type of response. Applied stresses ranged from 50 to 500 psi. The report describes a simple modification to be applied to the prediction procedure described in the first report of this series in order to take into account, to a first approximation, the nonlinear propagation of unloading waves that occurs in real media because of nonlinear stress-strain behavior in the unloading branch. The procedure which predicts stress and motion histories based on the conservation laws, a measured constitutive relationship, and the applied pressure-time profile, is demonstrated by predicting the entire sequence of an experimentally observed square-wave pulse transformation into a decaying pulse. (Author).
Download or read book Procedures for Prediction of Ground Shock Phenomena Based on One dimensional Shock Propagation Considerations written by James V. Zaccor and published by . This book was released on 1967 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Procedures for Prediction of Ground Shock Phenomena Based on One dimensional Shock Propagation Considerations written by James V. Zaccor and published by . This book was released on 1967 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).
Download or read book Structures to Resist the Effects of Accidental Explosions written by and published by . This book was released on 1991 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Procedures for Prediction of Ground Shock Phenomena Based on One dimensional Shock Propagation Considerations written by James V. Zaccor and published by . This book was released on 1967 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book List of Publications of the U S Army Engineer Waterways Experiment Station written by U.S. Army Engineer Waterways Experiment Station and published by . This book was released on 1976 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications Available for Purchase U s Army Engineer Waterways Experiment Station and Other Corps of Engineers Agencies written by and published by . This book was released on 1969 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Reports from U.S. Army Engineer Waterways Experiment Station and St. Paul District Hydraulic Laboratory; Reports published and distributed by Waterways Experiment Station for other Corps of Engineers agencies; Engineer manuals.
Download or read book List of Publications of the U S Army Engineer Waterways Experiment Station written by Waterways Experiment Station (U.S.) and published by . This book was released on 1973 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book List of Publications of the U S Army Engineers Waterway Experiment Station written by United States. Army. Corps of Engineers and published by . This book was released on 1976 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Index written by and published by . This book was released on 1973 with total page 1132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research and Development Reports Index written by and published by . This book was released on 1968 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Scientific and Industrial Reports written by and published by . This book was released on 1968 with total page 1012 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Procedures for Prediction of Ground Shock Phenomena Based on One dimensional Shock Propagation Considerations written by James V. Zaccor and published by . This book was released on 1967 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1991 with total page 1188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1968 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Centrifugal Simulation of Blast Parameters written by John P. Nielsen and published by . This book was released on 1983 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study is concerned with the use of a centrifuge as an experimental device on which free-field blast parameters could be evaluated. Free-field normal stress, created by the detonation of simulated high-explosive charges, was recorded within a sand medium. A series of experiments was concerned with the measurement of free-field normal stress, created by exploding buried charges. Another test series was concerned with the free-field normal stress beneath a concrete burster slab. The results of this study indicate that a centrifuge can be used as a simulator on which free-field blast effects can be evaluated. (Author).
