Accession Number : AD0692358

Title :   PROPERTIES OF THE DIAGRAMS OF CYCLIC DEFORMATION AT NORMAL TEMPERATURES,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Gusenkov,A. P.

Report Date : 19 JUN 1969

Pagination or Media Count : 52

Abstract : The problem involved in systematic experimental investigation of the properties of diagrams of cyclic elastic-plastic deformation as applied to the kinetics of the stressed state is posed. This study is based on an extensive literature survey. The level of initial deformation (or stresses), the number of leading cycles, the type of loading, the deformation rate, and the state of the material were taken as the main factors. Variations in the proportionality limit and in the unloading modules were also determined. Aluminum alloys V-95, AL-8, and D-16T, low-alloy carbon steels 45 and 30KhGSA, and high-temperature steels 1Kh18N9T and TS were studied in the form of thin-walled tubes. The parameters were recorded with plus or minus 5 percent accuracy. It was found that the materials can be cyclically strengthened, weakened, or stable. In the first half-cycle of loading, the proportionality limit is independent of the degree of initial deformation. Study of these structural materials, which have different mechanical properties, showed that with respect to the number of loading half-cycles with symmetric loading cycle, the diagram of cyclic elasto-plastic deformation formed a generalized diagram of cyclic deformation, providing a unique relationship between stress and deformations. (Author)

Descriptors :   (*STEEL, DEFORMATION), (*ALUMINUM ALLOYS, DEFORMATION), STRESSES, PIPES, DIAGRAMS, HYSTERESIS, LOADS(FORCES), FATIGUE(MECHANICS), USSR

Subject Categories : Metallurgy and Metallography
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE