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Armoured plates

Here M is the moment and Mp the fully-plastic moment of, for instance, a beam P/A is the indentation pressure and H the hardness of, for example, armour plating.) The left-hand side of each of these equations describes the loading conditions the right-hand side is a material property. When the left-hand side (which increases with load) equals the right-hand side (which is fixed), failure occurs. [Pg.140]

For large-scale work, armour-plated fume cupboards are likely to be required. [Pg.245]

Total world production of nickel is in the region of 1.0 million tonnes pa of which (1995) 25% comes from the former Soviet Union, 18% from Canada, 12% from New Caledonia and 10% from Australia. The bulk of this is used in the production of alloys both ferrous and non-ferrous. In 1889 J. Riley of Glasgow published a report on the effect of adding nickel to steel. This was noticed by the US Navy who initiated the use of nickel steels in armour plating. Stainless steels contain up to 8% Ni and the use of Alnico steel for permanent magnets has already been mentioned (p. 1114). [Pg.1146]

Increased protection to military personnel, particularly in the development of armour-plated vehicles, has led to a rapid growth in importance of weapons using shaped charges of explosive. The effects of shaping the explosive itself were observed independently by Munroe and... [Pg.158]

A recent alternative to shaped charges is known as the squashhead projectile. As the name implies, this contains a plastic explosive which spreads on impact so as to make contact with the largest possible area of the tank before detonating. When the explosive detonates, reflection of the shock wave causes a scab of metal to be displaced from the inside surface of the armour plate (see p. 135). The effect inside the tank can therefore be greater than is the case with a shaped charge which may do little more than penetrate the armour. The amount of scabbing is approximately proportional to the area of contact of the explosive at the moment of detonation. [Pg.159]

Even by the end of the nineteenth century it had become clear that some explosives safe to handle in principle (e.g. picric add), are nevertheless too sensitive to the impact that occurs when the projectile containing them strikes against heavy armour plate. Attempts were made therefore to decrease this sensitiveness by desensitization, or phlegmatization of the explosive. [Pg.257]

B4C boron carbide has a melting point of 2450 °C and a hardness somewhere between those of SiC and diamond. This makes the material a suitable abrasive. It is used in heads of sand blasting equipment, in mortars and in armour plating. For the latter application a B4C plate is provided on both sides with a plastic which has been reinforced with glass fibre. This is done to reduce the risk of splintering. Boron carbide is also used as the raw material for many other boron compounds ... [Pg.280]

The bunker entrance was built into the side of one of the more solid-looking loading platforms, a narrow trench leading down to a sturdy armour-plated door. The trench and the platform had been shored up with concrete and layered with satchels of energy-absorbent gel, a heavier-duty version of the padding in Sund s armour. Point-defence laser mines embedded in the concrete were clearly meant to be used on enemy aircraft, although the Doctor couldn t tell if any of them were currently active and in any case they were of no concern to anyone strolling up to knock on the door. [Pg.44]

The sample in a cell or tube is placed in an aluminium or titanium rotor, which is then driven by an electric motor. Although it is relatively uncommon, these rotors, when placed under high stress, sometimes break into fragments. The rotor chamber on all ultracentrifuges is covered with protective steel armour plate. The drive shaft of the ultracentrifuge is constructed of a flexible material to accomodate any wobble of the rotor due to imbalance of the sample. It is still important to counterbalance samples as carefully as possible. [Pg.397]

Ferro-zirconium is made by alumino-thermal reduction in an electric furnace, and is used in steel manufacture for de-oxidising, desulphurising and denitrogenising purposes, as also for making zirconium steel, armour plate and projectiles. [Pg.230]

In Britain an iron canal boat was launched in 1788, and the first iron sea-going vessel, the Aaron Mawby, was built in 1821. Round 1835 the use of armour plate was proposed at first the ships were built of wood and cased with metal later the wood was discarded and the vessels built entirely of steel. [Pg.283]

Towards the close of the 8o s of last century, Samuel J. Ritchie, who was interested in the Sudbury nickel ores, wrote to Krupps suggesting the use of an alloy of nickel and iron for ordnance. Krupps without hesitation rejected the idea as absurd. Meanwhile, however, the French had developed chrome steel projectiles that Were making havoc with the naval armour plate, and the problem arose as to how this was to be countered. [Pg.298]

In 1889 James Riley of Glasgow drew attention to the various special properties of nickel steels. This interested, amongst others, the American Naval Authorities, who, in 1891, purchased plain steel plates from British and French manufacturers and nickel steel plates from Le Creusot works of Schneider in France. On testing these, the last named proved much more resistant to projectile attack than the others. The results attracted world wide attention and the introduction of alloy steels for naval armour plate dates from this time. [Pg.298]

High-speed centrifuges are heavily armour plated. Why ... [Pg.98]

Armouring ceramics Shock-absorbing, hardness Protective (bullet-proof) vests, armour plating... [Pg.52]

Eads proposed a fleet of armour-plated, steam-propelled gunboats and constructed seven of these 600 tons vessels. Widiin two weeks, over four thousand men were engaged and in forty-five days, St. Louis, the first of the seven boats, was launched. In the course of the Civil War, Eads constructed another foiuteen gunboats incorporating several new ordnance inventions. Following this heroic undertaking, his health became seriously impaired, yet he was fit again in 1865. [Pg.262]


See other pages where Armoured plates is mentioned: [Pg.70]    [Pg.140]    [Pg.290]    [Pg.26]    [Pg.290]    [Pg.222]    [Pg.290]    [Pg.103]    [Pg.290]    [Pg.261]    [Pg.281]    [Pg.290]    [Pg.5]    [Pg.70]    [Pg.5]    [Pg.55]    [Pg.56]    [Pg.321]    [Pg.66]    [Pg.239]    [Pg.243]    [Pg.245]    [Pg.261]    [Pg.44]    [Pg.234]    [Pg.47]    [Pg.168]    [Pg.169]   


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