Search results
Results From The WOW.Com Content Network
Beginning during the Cold War, many AFVs have spall liners inside of the armour, designed to protect crew and equipment inside from fragmentation (spalling) released from the impact of enemy shells, especially high-explosive squash head warheads. Spall liners are made of aramids (Kevlar, Twaron), UHMWPE (Dyneema, Spectra Shield), or similar ...
Spall are fragments of a material that are broken off a larger solid body. It can be produced by a variety of mechanisms, including as a result of projectile impact, corrosion, weathering, cavitation, or excessive rolling pressure (as in a ball bearing). Spalling and spallation both describe the process of surface failure in which spall is shed.
In excess new nano-ceramic armour overlaying a vehicle's base armour, which is backed up by a spall-liner, can achieve a weight reduction of more than 40% to meet the Level 3 of STANAG 4569. [4] Furthermore, AMAP's glue and lining components work efficiently even at high temperatures (like 80 °C (176 °F)).
The best result was achieved by utilizing a 20 millimetres (0.79 in) thick MEXAS armour panel on top of a 7.3 millimetres (0.29 in) HHA plate fitted with a 10 millimetres (0.39 in) liner on the interior — a mass efficiency of 3.5; however the higher thickness decreased the thickness efficiency to 0.8 compared to the other tested armour layouts.
Spaced laminate armor was installed to the hull rear. Spaced laminate track skirts protected the lower hull. A semicircular shield was attached to the turret rear to add more stowage space, as well as act as spaced armor. Kevlar spall liners were added to critical areas. The troop carrying number was reduced to six, eliminating the periscope ...
The hull has the same ballistic protection as the Merkava Mk.III. The armor on the turret is sufficient to defeat small arms fire, shell splinters, blast overpressure, and most heavy machine gun rounds. The armor is augmented by spall liners, and the same overpressure NBC system as the Merkava Mk.III is fitted. There is also a back-up ...
The vehicles also mounted FMC armoured plates, a spall liner and belly armour, the fuel tanks were filled with safety foam balls, and the turret was fitted with a Danish kit consisting of ceramic and armoured plates developed by E. Falck Schmidt and Roulund in Odense, allowing the vehicle to resist fire from weapons up to 14.5 mm at a range ...
This fragmentation by blast wave is known as 'scabbing' or 'spalling', with the fragments termed 'scabs or 'spall'. [4] [2]Depending upon the armour thickness, a heavy piece of target material (4 to 10 kg (8.8 to 22.0 lb) for a 120 mm (4.7 in) round used in Arjun MBT [4]) can separate out from the other end of the target with supersonic velocities.