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Cracking may refer to: . Cracking, the formation of a fracture or partial fracture in a solid material studied as fracture mechanics. Performing a sternotomy; Fluid catalytic cracking, a catalytic process widely used in oil refineries for cracking large hydrocarbon molecules into smaller molecules
The rate of cracking and the end products are strongly dependent on the temperature and presence of catalysts. Cracking is the breakdown of large hydrocarbons into smaller, more useful alkanes and alkenes. Simply put, hydrocarbon cracking is the process of breaking long-chain hydrocarbons into short ones. This process requires high temperatures ...
The intergluteal cleft or just gluteal cleft, also known by a number of synonyms, including natal cleft and cluneal cleft, is the groove between the buttocks that runs from just below the sacrum to the perineum, [1] so named because it forms the visible border between the external rounded protrusions of the gluteus maximus muscles.
This is an accepted version of this page This is the latest accepted revision, reviewed on 2 December 2024. This is a list of onomatopoeias, i.e. words that imitate, resemble, or suggest the source of the sound that they describe. For more information, see the linked articles. Human vocal sounds Achoo, Atishoo, the sound of a sneeze Ahem, a sound made to clear the throat or to draw attention ...
Because of the pre-existing crack, the elastic energy released by fracture will associate with the surface energy at new crack surfaces, [12] and it was found that the crack propagation rate can be described by a function of the energy release rate, depending on which regime of crack propagation this relation is in. [11] Four regimes were ...
A shake (i.e. crack or split) radiating out from the heartwood. heel The corner of a chisel, knife, or gouge bevel which meets the back of the blade and polishes the cut. holdfast. Also called a hold down. A hold-down iron fitting into a hole in a bench and tightened or loosened by hammer taps. hollow grind A concave bevel on a chisel, gouge ...
crack on(-to) whereas "crack on" may be used in a generalised sense as "[to] get on with [something]" (often, a task), to "crack on to [some person, specifically]" indicates one was, or planned to, engage in flirtation, to varying degrees crikey (dated) exclamation of surprise (once a euphemism for Christ's keys or perhaps Christ Kill Me).
Short crack effect: In 1975, Pearson observed that short cracks grow faster than expected. [7] Possible reasons for the short crack effect include the presence of the T-stress, the tri-axial stress state at the crack tip, the lack of crack closure associated with short cracks and the large plastic zone in comparison to the crack length.