A Dictionary of Mechanical Engineering (Oxford Quick Reference) by Tony Atkins & Marcel Escudier

Author:Tony Atkins & Marcel Escudier [Atkins, Tony]
Language: eng
Format: azw
ISBN: 9780199587438
Publisher: Oxford University Press
Published: 2013-04-25T04:00:00+00:00

jet screech See JET NOISE.

jeweller's vice A portable vice consisting of two bars having pairs of threaded holes in which run hand‐driven screws.

j factor See COLBURN j FACTOR.

jig A device employed in manufacture that accurately locates and guides tools so as to ensure repeatability in dimensions. Also used in the assembly of parts. See also FIXTURE.

jig borer An especially accurate vertical milling machine tool for the manufacture of jigs and fixtures.

J integral A parameter of non‐linear elastic fracture mechanics given by the line integral on any curve Γ around a crack tip orientated along the x1 axis, starting from the lower surface and ending on the upper surface in an anticlockwise direction.

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