Viscoplastic Behavior of SUS304 Stainless Steel Under Cyclic Loading at Room Temperature

概要

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The stress-strain relation of SUS 304 stainless steel depends strongly on the stress or strain rate even at room temperature. The stress controlled uniaxial creep-ratcheting tests were conducted at room temperature to investigate the viscoplastic behavior of SUS 304 in cyclic loading. The effects of the prestrain and the cyclic stress condition, i.e. stress rate, stress ratio, maximum stress and its hold time, on the strain accumulation are discussed. The asymptotic stress-strain curve in the tension subsequent to creep-ratcheting reaches the monotonic stress-strain curve. A creep strain rate is determined as a function of the magnitude of total strain at the present time even if the material has been subjected to cyclic stressing prior to the creep. Consequently, the strain hardening of the material can be quantified by use of the accumulated strain by creep-ratcheting.
一般社団法人日本機械学会の論文
1989-01-15