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Crazes in polystyrene (PS). Crazing is a yielding mechanism in polymers characterized by the formation of a fine network of microvoids and fibrils. [1] [2] These structures (known as crazes) typically appear as linear features and frequently precede brittle fracture.
The specimen is placed on the work table and a notch is created exactly at the centre. The crack should be generated such that the defect length is about half the depth. The load applied on the specimen is generally a three-point bending load. A type of strain gauge called a crack-mouth clip gage is used to measure the crack opening. [3]
Fibre-reinforced plastic (FRP; also called fibre-reinforced polymer, or in American English fiber) is a composite material made of a polymer matrix reinforced with fibres. The fibres are usually glass (in fibreglass ), carbon (in carbon-fibre-reinforced polymer ), aramid , or basalt .
FRP may refer to: Organizations. FairPoint Communications (NASDAQ), an American telecommunications company; Free Russian Press (1853–1867), a Russian-language ...
Hamilton-Smith and Wastell transferred to FRP Advisory and continued to act on the liquidation, and FRP Advisory fought to have them reinstated as liquidators of Stanford after a court decision to remove them, [8] but the Eastern Caribbean Court of Appeal confirmed their removal in May 2011, passing the case to Grant Thornton. [9]
Software crack illustration. Software cracking (known as "breaking" mostly in the 1980s [1]) is an act of removing copy protection from a software. [2] Copy protection can be removed by applying a specific crack. A crack can mean any tool that enables breaking software protection, a stolen product key, or guessed password. Cracking software ...
Derek J. de Solla Price (1922–1983) with a model of the Antikythera mechanism. Captain Dimitrios Kontos (Δημήτριος Κοντός) and a crew of sponge divers from Symi island discovered the Antikythera wreck in early 1900, and recovered artefacts during the first expedition with the Hellenic Royal Navy, in 1900–01. [32]
A recent trend is toward wood-composite aircraft. The basic load carrying material is still wood, but it is combined with foam (for instance, to increase buckling resistance of load carrying plywood skins) and other synthetic materials like fiberglass and carbon fiber (to locally increase the modulus of load carrying structures such as spar caps).