STRESS-STRAIN BEHAVIOR OF A Cr-Mo-V STEEL UNDER VARIABLE AMPLITUDE LOADS.
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Recent viscoplastic theories have been successful in describing strain behavior under variable loads. However, convincing experimental evidence was lacking to elucidate the essentially viscoplastic nature of the inelastic behavior of metals. The paper discusses an investigation in which the inelastic behavior of a Cr-Mo-V steel was studied in uniaxial stress at room temperatures. At high stresses, the viscous strains are found to be significant and revived with each application following a prestrain. The laws of the dependence of viscous strains on stress and prestrain are determined experimentally.