Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 812 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 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 Predicting Blast induced Body Motions of a Buried Structure with Footings written by Jay R. Allgood and published by . This book was released on 1967 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: An approximate theory is presented for predicting the absolute and relative body deflections of shallow-buried shelters in order to provide the designer with a rational approach for selecting footing dimensions. The theory consists of two coupled parts, one that describes the motion of the free field and another that defines the motion of a model of the structure, its foundation, and the covering soil. The soil characteristics are represented by straight-line approximations to the loading and unloading portions of the stress-strain diagram from a one-dimensional compression test. Incremental strains are integrated as the stress wave propagates downward to obtain the absolute free-field displacement at the elevation of the footings. Motion of the structure is represented by a single-degree-of-freedom analog. Empirical functions are used to represent footing reaction and arching in the model of the structure. These functions are incorporated in the differential equation of motion, which is solved with the aid of a digital computer. The results are compared with available test data; velocities and deflections agree reasonably well but the magnitude of the peak accelerations from the theory are larger than the corresponding measurements. Computations performed with the computer code indicate that surface loads above about 100 psi cannot be resisted if the maximum relative deflection between the footing and the floor slab is limited to 2 inches. (Author).
Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1967 with total page 1352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Development Reports written by and published by . This book was released on 1966-11 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 1966 Army Science Conference United States Military Academy West Point N Y 14 17 June 1966 written by and published by . This book was released on 1966 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research and Development Reports written by and published by . This book was released on 1967-10 with total page 1178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Lunar Science Conference written by and published by . This book was released on 1971 with total page 1360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Acta Geodaetica Geophysica Et Montanistica written by and published by . This book was released on 1971 with total page 496 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 1967-10 with total page 1182 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 1967 with total page 678 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 1967 with total page 986 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sagamore Army Materials Research Conference Proceedings written by and published by . This book was released on 1970 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings Symposium on Rock Mechanics written by and published by . This book was released on 1970 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coordination of Industrial Air and Water Quality Programs as an Effective Management Policy written by Dennis P. Tihansky and published by . This book was released on 1971 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paper recommends the coordination of air and water quality management programs in industry as an effective approach for the minimization of abatement expenditures as well as schedule delays in meeting pollution control regulations. Complementarity of waste treatment projects is evaluated in terms of both regional (out-of-plant) and intra-firm advantages. (Author).
Download or read book Applications of the Finite Element Method in Geotechnical Engineering written by Chandrakant S. Desai and published by . This book was released on 1972 with total page 1254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applications of the Finite Element Method in Geotechnical Engineering written by and published by . This book was released on 1972 with total page 1258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
