Accession Number : AD0688661

Title :   CRACK EXTENSION IN TRANSVERSELY LOADED ELASTIC PLATES.

Descriptive Note : Technical rept.,

Corporate Author : STANFORD UNIV CALIF DEPT OF APPLIED MECHANICS

Personal Author(s) : Harris,David Owen

Report Date : MAY 1969

Pagination or Media Count : 188

Abstract : Running cracks in elastic plates have been observed to be arrested as they pass under a zone of externally applied transverse compression. This phenomenon has been observed in a variety of brittle materials, such as beryllium, glass, tungsten, and graphite, and has been used to produce controlled precracks in fracture toughness specimens of materials that are difficult to fatigue crack. In addition to this practical application, this phenomenon could prove useful in arresting cracks in actual structures, thereby providing a 'fail-safe' design and decreasing the likelihood of catastrophic failure. The purpose of the investigation was to examine the mechanics of this crack arrest from both theoretical and experimental standpoints, and to thus determine the controlling geometrical and material parameters. (Author)

Descriptors :   (*CRACK PROPAGATION, METAL PLATES), (*LOADS(FORCES), METAL PLATES), CRACKS, ELASTIC PROPERTIES, COMPRESSIVE PROPERTIES, BRITTLENESS, FATIGUE(MECHANICS), FRACTURE(MECHANICS), STRESSES, DISTRIBUTION, INTEGRAL TRANSFORMS, SPECIAL FUNCTIONS(MATHEMATICAL), STEEL, TENSILE PROPERTIES, EXPERIMENTAL DESIGN

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE