Accession Number : ADA103429


Title :   Manual on the Fatigue of Structures. II. Causes and Prevention of Damage. 7. Mechanical Surface Damage,


Corporate Author : ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRANCE)


Personal Author(s) : Barrois,W G


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a103429.pdf


Report Date : Jun 1981


Pagination or Media Count : 144


Abstract : The author reviews and compares the processes and practical aspects of the various causes of mechanical damage to the surface of structures, which may lead to fatigue or stress corrosion failure or final rupture under the effect of the loads applied in service. Such damage is the result of heat treatment faults, grinding, wear, rolling fatigue, contact fatigue or fretting, as well as abrasion, solid or liquid particle erosion and cavitation. In spite of apparent difference, the elementary processes of these modes of mechanical damage have in fact a certain degree of uniformity and include an initial fatigue phase due to repeated plastic strains; the corresponding alternating stresses on the microscopic scale involve the detachment of particles in each of these processes. Examples are given to illustrate how any effect which corrosion may have is confined, in laboratory tests, to the oxidation of debris, though its influence may be more complex when occurring in actual structures in service where the time involved is much longer. (Author)


Descriptors :   *STEEL , *FATIGUE(MECHANICS) , STRESSES , MECHANICAL PROPERTIES , SURFACE ANALYSIS , DAMAGE , IMPACT TESTS , LOADS(FORCES) , RAILS , STRUCTURAL ANALYSIS , CRACKS , RUPTURE , PLASTIC PROPERTIES , ROLLER BEARINGS , CAMS , FAILURE(MECHANICS) , FRICTION , GEARS , GRINDING , EROSION RESISTANCE , METALLURGY , BALL BEARINGS


Subject Categories : Metallurgy and Metallography
      Fabrication Metallurgy
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE