Improvised explosive device ied safe standoff distance cheat sheet open pdf 168kb this document is a cheat sheet for the specific threat posed by improvised explosive devices. Read isc security design criteria for new federal office. Bond window is the range of process variables, such as velocity. Explosive forming 1 unconfined type or stand off technique. At detonation, the focusing of the explosive high pressure wave as it becomes incident to the side wall causes the metal liner of the lsc to collapsecreating the cutting force.
Usually, the standoff distance available and the assumed size of the explosive device will determine the blastresistant features that must be provided. Standoff explosive detection takes step backward officer. Standoff distance is a security term that refers to measures to prevent unscreened and potentially threatening people and vehicles from approaching within a certain distance of a building, car, or other. Explosive forming is a metalworking technique in which an explosive charge is used instead of. Contact operations place the explosive in direct contact with the metal. Standoff explosive detection improvements, therefore, have never been more welcome. Unit 5b high velocity forming methods linkedin slideshare. Booster standoff distance, and predicting blast effects. Table b1 standoff distances for new and existing buildings. If any two or more magazines are separated by less than the specified distance, then the weights in the magazines must be combined and considered as one. Evaluation of welding parameters effects on corrosion.
The ability to detect explosives at a standoff distance, for instance in cases involving suicide bombers on foot or in a vehicle, is a daunting but vital need. How does one calculate a safe distance from an explosion. Standoff explosives trace detection and imaging by. Existing and potential standoff explosives detection. Improvised explosive device ied safe standoff distance cheat sheet open pdf 168 kb this document is a cheat sheet for the specific threat posed by improvised explosive devices. Pdf in this research, the effect of standoff distance on the. Calculated outflow velocity of the projectile head ranged between 850 ms and 1566 ms. Explosive welding explosive material welding scribd. Various techniques explosive forming operations can be divided into two groups, depending on the position of the explosive charge relative to the work piece. When the standoff distance is small, the jet cannot fully develop and the jet back flow is serious, reducing the rockbreaking effect.
Or the shaping or modifying of metals by means of explosions. Udomphol explosive charge is detonated in medium water at an appropriate standoff distance from the sheet blank at a very high velocity. Generally it is taken double of thickness of flyer plate for thin plates and equal to thickness of flyer plate for thick plates. The goal of whole building design is to create a successful highperformance building. It can be used on materials for which a press setup would be prohibitively large or require an. Pdf effect of standoff distance on the mechanical and. Home united facilities criteria cd 2 table b1 standoff distances for new and existing buildings. Improvised explosive device ied safe standoff distance cheat sheet threat description explosives mass1 tnt equivalent building evacuation distance2 outdoor evacuation distance3 pipe bomb 5. Standoff distance plays a vital role in explosion welding. The microhardness of the sample with 1 mam standoff distance was 650 hv that increased to 927 hv in the sample with 2. Inch, as a function of standoff distance and net explosive weight, page 417, fema 426. Explosive forming process explosive material explosion free 30. Table of distances bureau of alcohol, tobacco, firearms.
The sheet gives an estimate of how far a person should stand from different explosive devices to avoid any injury. These munitions are spaced 17 centimeters apart on a nylon webbing array. Standoff is the distance between the cladder and base plate prior to the join ing operation. Calculated maximal pressure inside the nozzle ranged from. Standoff detection of explosive substances at distances of up to 150m article pdf available in applied optics 4911. A definite quantity of explosive is placed suitably in water medium at a. Pdf explosive forming of aerospace components researchgate. Explosive forming is labor intensive, but requires only single. Governed by the ability of typical us commercial construction to resist severe. Schematic illustration of explosive welding of thin w and cu plates. Effect of standoff distance on the mechanical and metallurgical.
Explosives can be placed at a fixed distance from the workpiece. The explosive energy replaces the male part of the tool that is used in regular forming processes. The standoff distance was 16 cm in all experiments. Based on maximum volume or weight of explosive tnt equivalent that could reasonably. What explosives are being used high or low, tnt, natural gas, etc, is the explosion occurring on the ground or mid air as in a bomb. Each type of explosive has a specific table of distance.
Explosive forming is a process in which forces produced by an explosion are used to shape a workpiece. Numerical and experimental studies on the explosive welding of. Pdf tno is involved in development of the explosive forming technology for the fabrication of metal sheets. Explosive forming is a metalworking technique in which an explosive charge is used instead of a punch or press. Manual for beryllium prospecters, january 1d, iwl ps 151105, 51. Wbdg is a gateway to uptodate information on integrated whole building design techniques and technologies. Investigation of materials for liners of shaped charge. Explosive forming can be separated into two different categories. Recent developments in spectroscopic techniques for the. A variety of technologies are emerging to move explosive detection backwards, away from the threat, some up to. A solidstate welding process that produces coalescence by high velocity interaction of the work pieces produced by a controlled detonation. A definite quantity of explosive is placed suitably in water medium at a definite stand off distance from the. Improvised explosive device ied safe standoff distance. A definite quantity of explosive is placed suitably in water medium at a definite stand off.
The velocity of explosive material was measured by the fiberoptic system. Explosive forming process free download as powerpoint presentation. Dualexcitationwavelength resonanceraman explosives. A punch in conventional forming is replaced by an explosive charge. Large explosive devices detonated at relatively great. Ufc 401002 dod minimum antiterrorism standoff distances for buildings fouo, with change 1 10082003 federal facility criteria. Additive manufacturing of liners for shaped charges. There are lots of variables to be taken into consideration such as. After detonation the explosive forces travel through the intervening medium to reach the work piece. Standoff detection of hazardous materials remains an important challenge which persists despite decades of research. Generally, the preset standoff distance should be twice the flyer thickness. Standoff operations places the explosive charge some distance away from the workpiece. The ens is a net with explosive shaped charge munitions located at each node.
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