Flying Glass
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Flying glass refers to pieces of broken
glass Glass is an amorphous (non-crystalline solid, non-crystalline) solid. Because it is often transparency and translucency, transparent and chemically inert, glass has found widespread practical, technological, and decorative use in window pane ...
(typically from a
window A window is an opening in a wall, door, roof, or vehicle that allows the exchange of light and may also allow the passage of sound and sometimes air. Modern windows are usually glazed or covered in some other transparent or translucent ma ...
) which become sharp missiles projected by the force which broke the glass, along with any strain energy due to tempering. They often cause cut-type
injuries Injury is physiological damage to the living tissue of any organism, whether in humans, in other animals, or in plants. Injuries can be caused in many ways, including mechanically with penetration by sharp objects such as teeth or with b ...
. Flying glass resulting from an
explosion An explosion is a rapid expansion in volume of a given amount of matter associated with an extreme outward release of energy, usually with the generation of high temperatures and release of high-pressure gases. Explosions may also be generated ...
poses a significant risk in the event; up to 85% of injuries from an explosion are due to flying glass. Severity of injury from flying glass depends on the peak overpressure of the blast. Potential for injury has been derived from both experiments and theoretical modeling of blast effects. Among the important features in models of flying glass are breaking pressure, velocity and distribution of flying fragments, fragment shape, and the distance traveled until impact. Mitigation strategies, such as the use of window glazing or
laminated glass Laminated glass is a type of safety glass consisting of two or more layers of glass with one or more thin polymer interlayers between them which prevent the glass from breaking into large sharp pieces. Breaking produces a characteristic "spider ...
can reduce flying glass injuries.


References

Injuries Glass engineering and science {{glass-stub