Creep, Stress Relaxation and Biaxial Ratchetting of Type 304 Stainless Steel After Cyclic Preloading
Creep, Stress Relaxation and Biaxial Ratchetting of Type 304 Stainless Steel After Cyclic Preloading
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循环预加载后 304 型不锈钢的蠕变、应力松弛和双轴棘轮
DOI：
10.1115/1.2904263
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发表时间：
1994
影响因子：
1.2
通讯作者：
K. Sasaki
中科院分区：
文献类型：
--
作者：
H. Ishikawa;K. Sasaki
对304不锈钢在循环预加载后的蠕变、应力松弛和双向棘轮效应进行了一系列试验，以研究它们之间的相互作用。指出了循环塑性中的背应力在描述循环预加载后的蠕变、松弛和双向棘轮效应中的重要作用。然后，试验结果表明，由于循环预加载后的蠕变的材料行为可以由修正的Bailey-Norton定律表示，其中应力水平从屈服面的当前中心评估，即，背应力由作者提出的循环塑性混合本构模型确定。此外，循环预加载后循环剪应变引起的轴向应变的双向棘轮效应由剪应力幅值、循环次数和距当前中心的轴向应力水平表示。
A series of tests for creep, stress relaxation, and biaxial ratchetting of type 304 stainless steel after cyclic preloading were carried out to investigate their interaction. The interesting fact was pointed out that back stress in cyclic plasticity played an important role to describe creep, relaxation, and biaxial ratchetting following cyclic preloading. Then, the test results showed that the material behavior due to creep after cyclic preloading could be represented by the modified Bailey-Norton law with stress levels evaluated from the current center of the yield surface, i.e., back stress which was determined by the hybrid constitutive model for cyclic plasticity proposed by the authors. In addition, biaxial ratchetting of axial strain induced by cyclic shear straining after cyclic preloading was expressed by the shear stress amplitude, the number of cycle and the axial stress level from the current center.