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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



in strength of materials, a localized compressive stress, accompanied, as a rule, by permanent deformation (pressing down) of the material. Crumpling occurs in joints (bolted, riveted, key) in locations of structural supports, and in contact zones of compressed components.

The magnitude of crumpling stress in structures is usually kept below the allowable crumpling stress. This allowable stress is determined by the character of the surfaces in contact, the properties of the structural material, and the orientation of this material with respect to applied loads (for instance, with wood, parallel or perpendicular to the grain). Various design features aimed at reducing crumpling stresses and, more important, permanent deformation distribute the compressive stress over a large area with the aid of, for example, washers, liners, and pads. One of the most effective means for reducing deformation is the use of special inserts and fillers in the contact zones made of materials that are stronger than the structural material.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
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I always put a donation in the envelope provided, but, sadly have watched countless people come and go through the waiting room and not one person has ever made a donation, In fact, they just crumple up the donation envelope and drop it on the floor.
If no bees have arrived by the time the flower starts to crumple with age, the stamens snap up anyway and dump pollen onto the flower's own female organ.
It takes energy to crumple a sheet-to force it uniformly into a smaller and smaller ball.
Railtrack was slammed yesterday for leaving pounds 400million worth of new trains in the sidings while passengers are forced to use 40-year- old rolling stock, which can crumple in a crash.