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Ballistic Plate
A ballistic plate, also known as an armour plate, is a protective armoured plate inserted into a carrier or bulletproof vest, that can be used stand-alone, or in conjunction with other armour. "Hard armour" usually denotes armour that uses ballistic plates. It serves to defeat higher threats, and may be considered as a form of applique armour. It is usually inserted into the front and back, with side inserts also sometimes used. There are also plates for other regions, such as the shoulders, lap, and throat. Dimensions and sizing Ballistic plates can be found in a variety of sizes and shapes. In the industry, armour plate shapes are common referred to as a cut, in reference to how the strike face must be cut from the material. The most common are the: * SAPI Cut, a rectangle with two sloped cuts on the top two corners, the name being derived from the SAPI armour plate. Similar, but with larger cuts, is the Shooter's Cut. * Swimmer's Cut, similar to a stretched trapezoid on to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Air Force
The United States Air Force (USAF) is the Air force, air service branch of the United States Department of Defense. It is one of the six United States Armed Forces and one of the eight uniformed services of the United States. Tracing its origins to 1 August 1907, as a part of the United States Army Signal Corps, the USAF was established by transfer of personnel from the Army Air Forces with the enactment of the National Security Act of 1947. It is the second youngest branch of the United States Armed Forces and the fourth in United States order of precedence, order of precedence. The United States Air Force articulates its core missions as air supremacy, intelligence, surveillance, target acquisition, and reconnaissance, global integrated intelligence, surveillance and reconnaissance, airlift, rapid global mobility, Strategic bombing, global strike, and command and control. The United States Department of the Air Force, Department of the Air Force, which serves as the USAF's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulletproof Vest
A bulletproof vest, also known as a ballistic vest or bullet-resistant vest, is a type of body armor designed to absorb impact and prevent the penetration of firearm projectiles and explosion fragments to the torso. The vest can be either soft—as worn by police officers, security personnel, prison guards, and occasionally private citizens to protect against stabbing attacks or light projectiles—or hard, incorporating metallic or para-aramid components. Soldiers and police tactical units typically wear hard armour, either alone or combined with soft armour, to protect against rifle ammunition or fragmentation. Additional protection includes trauma plates for blunt force and ceramic inserts for high-caliber rounds. Bulletproof vests have evolved over centuries, from early designs like those made for knights and military leaders to modern-day versions. Early ballistic protection used materials like cotton and silk, while contemporary vests employ advanced fibers and cera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nanocomposite
Nanocomposite is a multiphase solid material where one of the phases has one, two or three dimensions of less than 100 nanometers (nm) or structures having nano-scale repeat distances between the different phases that make up the material. In the broadest sense this definition can include porous media, colloids, gels and copolymers, but is more usually taken to mean the solid combination of a bulk matrix and nano-dimensional phase(s) differing in properties due to dissimilarities in structure and chemistry. The mechanical, electrical, thermal, optical, electrochemical, catalytic properties of the nanocomposite will differ markedly from that of the component materials. Size limits for these effects have been proposed: in Kelly, A, ''Concise encyclopedia of composites materials'', Elsevier Science Ltd, 1994 #<5 nm for catalytic activity #<20 nm for making a hard magnetic material soft #<50 nm for refractive index changes #<100 nm for achieving superparamagnetism, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbon Nanotube
A carbon nanotube (CNT) is a tube made of carbon with a diameter in the nanometre range ( nanoscale). They are one of the allotropes of carbon. Two broad classes of carbon nanotubes are recognized: * ''Single-walled carbon nanotubes'' (''SWCNTs'') have diameters around 0.5–2.0 nanometres, about 100,000 times smaller than the width of a human hair. They can be idealised as cutouts from a two-dimensional graphene sheet rolled up to form a hollow cylinder. * ''Multi-walled carbon nanotubes'' (''MWCNTs'') consist of nested single-wall carbon nanotubes in a nested, tube-in-tube structure. Double- and triple-walled carbon nanotubes are special cases of MWCNT. Carbon nanotubes can exhibit remarkable properties, such as exceptional tensile strength and thermal conductivity because of their nanostructure and strength of the bonds between carbon atoms. Some SWCNT structures exhibit high electrical conductivity while others are semiconductors. In addition, carbon nanotubes can b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ultra-high-molecular-weight Polyethylene
Ultra-high-molecular-weight polyethylene (UHMWPE, UHMW) is a subset of the thermoplastic polyethylene. Also known as high-modulus polyethylene (HMPE), it has extremely long chains, with a molecular mass typically between 2 and 6 million amu. The longer chain serves to transfer load more effectively to the polymer backbone by strengthening intermolecular interactions. This results in a very tough material, with the highest impact strength of any thermoplastic presently made. UHMWPE is odorless, tasteless, and nontoxic. It embodies all the characteristics of high-density polyethylene (HDPE) with the added traits of being resistant to concentrated acids and alkalis, as well as numerous organic solvents. It is highly resistant to corrosive chemicals except oxidizing acids; has extremely low moisture absorption and a very low coefficient of friction; is self-lubricating (see boundary lubrication); and is highly resistant to abrasion, in some forms being 15 times more resistant to a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Defence Equipment And Support
Defence Equipment and Support (DE&S) is a trading entity and joint-defence organisation within the UK Ministry of Defence. It began operating on 2 April 2007, following the merger of the MoD's Defence Procurement Agency and the Defence Logistics Organisation, under the Chief Executive Officer of Defence Equipment and Support. In 2022, the DE&S workforce was around 11,500 with the majority based at MoD Abbey Wood in Bristol. History Defence Equipment and Support was established on 2 April 2007 with General Sir Kevin O'Donoghue as its first CEO. Responsibility for 'Logistics, Commodities and Services' (including storage and delivery of non-weaponry equipment, such as food and clothing, to soldiers) was contracted out to the private sector in 2015 under an arrangement that included the transfer of 1,100 staff and construction of a new Defence Fulfilment Centre at MoD Donnington. In September 2022, Andy Start was appointed CEO of the organisation, joining from an executiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Osprey Body Armour
Osprey body armour is a system of body armour used by the British Armed Forces. The system is in its fourth iteration following extensive development and engagement with front line users. History British forces first began using body armour on a widespread basis when combatting terrorist activities in Northern Ireland during Operation Banner, with this initially consisting of M52 and M69 flak vests and then the Individual Northern Ireland Body Armour vest which could be worn under the combat jacket. A vest known as Combat Body Armour was introduced for general issue outside of Northern Ireland in the 1980s, but consisted purely of soft body armour since the focus was on preventing injury from fragments generated by explosive blasts. A later version known as Enhanced Combat Body Armour (ECBA) was developed in 1991 and allowed for the soft body armour to be augmented with ceramic ballistic plate, hard armour plates for improved ballistic protection, but the small size of these ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceradyne
Ceradyne, Incorporated is a wholly owned subsidiary of the British company, Avon Rubber. Ceradyne, Inc. is a manufacturer of advanced ceramic systems and components and involved in many technical industries including nuclear power, oil and gas, solar energy, automotive, and defense. Background Ceradyne was founded in 1967 and in late 2004, the company added new product lines by acquiring ESK Ceramics of Kempten, Germany. In addition to producing ceramic components for industrial processes such as silicon foundries and ceramic fuel pellets for nuclear reactors, Ceradyne researched and produced varieties of ballistic armour for both personnel and vehicles. The ceramic armor was lighter than regular steel plate armor facilitating greater mobility. On September 16, 2007, the company was selling 25,000 sets of armor a month to the Pentagon.In December 2007, Ceradyne's lightweight armor was approved by the Army for use on military vehicles. Oshkosh Truck produced the first of thes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulletproof Vest
A bulletproof vest, also known as a ballistic vest or bullet-resistant vest, is a type of body armor designed to absorb impact and prevent the penetration of firearm projectiles and explosion fragments to the torso. The vest can be either soft—as worn by police officers, security personnel, prison guards, and occasionally private citizens to protect against stabbing attacks or light projectiles—or hard, incorporating metallic or para-aramid components. Soldiers and police tactical units typically wear hard armour, either alone or combined with soft armour, to protect against rifle ammunition or fragmentation. Additional protection includes trauma plates for blunt force and ceramic inserts for high-caliber rounds. Bulletproof vests have evolved over centuries, from early designs like those made for knights and military leaders to modern-day versions. Early ballistic protection used materials like cotton and silk, while contemporary vests employ advanced fibers and cera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stress Concentration
In solid mechanics, a stress concentration (also called a stress raiser or a stress riser or notch sensitivity) is a location in an object where the stress (mechanics), stress is significantly greater than the surrounding region. Stress concentrations occur when there are irregularities in the geometry or material of a structural component that cause an interruption to the flow of stress. This arises from such details as holes, Groove (engineering), grooves, Notch (engineering), notches and Fillet (mechanics), fillets. Stress concentrations may also occur from accidental damage such as nicks and scratches. The degree of concentration of a discontinuity under typically Tension (physics), tensile loads can be expressed as a non-dimensional stress concentration factor K_t, which is the ratio of the highest stress to the nominal far field stress. For a circular hole in an infinite plate, K_t = 3. The stress concentration factor should not be confused with the stress intensity factor, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silicon Carbide
Silicon carbide (SiC), also known as carborundum (), is a hard chemical compound containing silicon and carbon. A wide bandgap semiconductor, it occurs in nature as the extremely rare mineral moissanite, but has been mass-produced as a powder and crystal since 1893 for use as an abrasive. Grains of silicon carbide can be bonded together by sintering to form very hard ceramics that are widely used in applications requiring high endurance, such as car brakes, car clutches and ceramic plates in bulletproof vests. Large single crystals of silicon carbide can be grown by the Lely method and they can be cut into gems known as synthetic moissanite. Electronic applications of silicon carbide such as light-emitting diodes (LEDs) and Cat's whisker detector, detectors in early radios were first demonstrated around 1907. SiC is used in semiconductor electronics devices that operate at high temperatures or high voltages, or both. Natural occurrence Naturally occurring moissanite is found ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
