crazing


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crazing

[′krāz·iŋ]
(engineering)
A network of fine cracks on or under the surface of a material such as enamel, glaze, metal, or plastic.
(metallurgy)
Development of a network of cracks on a metal surface.

Crazing

In painting, a minute random cracking of a finish coat of paint due to uneven shrinking of the paint. In masonry, the appearance of very fine cracks while the surface is drying due to uneven contraction.

crazing, cracking, craze cracks

Fine, random cracks or fissures in a network on or under a surface of plaster, cement, mortar, concrete, ceramic coating, or paint film; caused by shrinkage.

crazing

A form of heat damage that occurs to transparent thermoplastic material. Canopies, side glasses, etc. are made of thermoplastic materials. Crazing manifests itself as a series of tiny, hairline cracks in the surface of the plastic. Crazing makes the plastic weak and reduces its transparency and in the worst cases, it makes the plastic become opaque.
References in periodicals archive ?
crazing to shear banding transition phenomena, can be examined using compatible blends of brittle and ductile homopolymers.
Conventional crazing methods, such as tensile tests, the copper grid technique for the transmission electron microscope (TEM), and the grooved aluminum plate technique, require expensive equipments, which are most of the time complicated to use.
Let q be the fraction of entangled strands that survive crazing, which is on the order of 0.
In the case of PE materials, it has previously been reported that while thermal history can influence crazing and SCG resistance, performance is primarily governed by the molecular weight and comonomer distributions of raw materials [19].
At a later stage of loading (post-peak), multiple crazing continues to be the principal damage mechanism for both of the 10% and 30% LBA ratio specimens.
Given that the structural properties of the materials were not varied, the transition from crazing to shear therefore appears to depend on the state of the constraint.
Crazing is even more prominent as polymers find their way into applications where they are replacing metals.
The Design of Experiments (DOE) approach was used to build quantitative empirical models of the residual mechanical properties of crazed polycarbonate as functions of relative craze density, crazing stress, and strain rate.
Crazing in polymers may arise at crack tips owing to high stress concentration, as reviewed by Kramer and Berger [1, 2].