Download or read book Reaction Propagation Studies in Beam Initiated Confined Explosives written by and published by . This book was released on 1990 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiments have been performed with the electron beam at the NRL linac in which confined explosives were partially irradiated to study how the reaction spreads radially from the hot central region to the cool outer regions. Four types of high explosives were studied: PBX-9404, PBXW-109, HBX-1, and TATB. Data were obtained with two sets of beam pulse parameters, and as a function of confinement window thickness. The results vary widely, from no reaction spreading at all in TATB to complete spreading and consumption in PBX-9404. The violence of the explosion increases with increasing confinement. Keywords: Plastic bonded explosives; Reaction kinetics; Threshold effect sensitivity; Nitrobenzenes.

Download or read book Theory and Modeling of Thermal Reaction Propagation in Beam Initiated Explosives written by J. B Aviles (Jr) and published by . This book was released on 1993 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Previous work on the thermal initiation of energetic materials by particle beams concentrated on uniformly irradiated confined samples. The present report extends the work to situations where only a portion of the material has been irradiated. In some materials (e.g., TATB) only the irradiated region undergoes thermal initiation; in other materials a thermal initiation front has been observed (by thermocouple response) to propagate away from the irradiated region. The frontal speeds are of the order of centimeters per second to tens of centimeters per second. These slow speeds eliminate the possibility of pressure propagation or a deflagration to detonation transition (DDT). Modeling is based on the interference that at the thermal initiation temperature the material develops a greatly enhance thermal and gaseous diffusivity. This allows the exothermic energy released to propagate into the cold region and forestalls any explosive temperature rise. At a well defined positive R* (the explosion radius) thermal initiation propagation ceases and an explosive temperature rise takes place.

Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 1470 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1993-10 with total page 1662 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1977 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings written by and published by . This book was released on 1982 with total page 1126 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings Seventh Symposium International on Detonation written by and published by . This book was released on 1982 with total page 1120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal Initiation of Confined Primary Explosives with a Proton Beam written by and published by . This book was released on 1989 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thermal initiation characteristics of the primary explosives lead azide and lead styphnate have been studied by heating confined samples with a 200-MeV proton beam. Values were obtained for thermal initiation thresholds, explosion temperatures, and average specific heats. Thresholds and explosion temperatures, and average specific heats. Thresholds and explosion temperatures were found to depend strongly on the beam heating rate. Keywords: Explosives; Proton beam; Thermal initiation.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration. Technical Information Center and published by . This book was released on 1977 with total page 1680 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ERDA Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1976 with total page 716 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 1994 with total page 1144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fusion Energy Update written by and published by . This book was released on 1979 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 1288 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Explosives and Blasting Procedures Manual written by Richard A. Dick and published by . This book was released on 1982 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Shock and Vibration Bulletin written by and published by . This book was released on 1984 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book China written by World Bank and published by World Bank Publications. This book was released on 1993 with total page 1422 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Republic of Korea's industrial policy has directed that nation's economy through nearly three decades of spectacular growth. But the authors of this paper maintain that this policy is showing signs of being outmoded. The time has come, the authors argue, for the Korean government to stop managing the economy's structural development and to redefine the responsibilities of business and government. Under this proposed compact, the allocation of resources would shift from the government to the private industrial and financial sectors. The transformation of the government bureaucracy from an ad hoc policy role to one of a transparent and predictable regulator is a key to the success of this undertaking. These new directions would present the government with enormous challenges. Greater competitive discipline and regulatory oversight would be required. While dealing with the complexities of the transition, the government would have to maintain macroeconomic stability and the momentum of savings and investment. For comparison, the study examines the industrial economies of France, Germany, Japan, and the United States, which underwent similar shifts.