Experimental study on ratchetting-fatigue interaction of SS304 stainless steel in uniaxial cyclic stressing
Experimental study on ratchetting-fatigue interaction of SS304 stainless steel in uniaxial cyclic stressing
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DOI：
10.1016/j.msea.2006.07.006
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发表时间：
2006-11
期刊：
影响因子：
6.4
通讯作者：
G. Kang;Yu-jie Liu;Z. Li
中科院分区：
文献类型：
--
作者：
G. Kang;Yu-jie Liu;Z. Li
通过室温下 SS304 不锈钢的单轴循环应力试验研究了棘轮行为和疲劳失效及其相互作用。在不同载荷水平下测量了材料的棘轮应变和疲劳寿命。讨论了平均应力、应力幅和应力比对棘轮应变和最终失效寿命的影响。同时，还说明了响应应变幅值随循环次数的变化，以讨论棘轮行为与疲劳失效的相互作用。实验结果表明，材料的棘轮应变和疲劳寿命很大程度上取决于单轴循环应力的平均应力、应力幅和应力比，并且根据表中规定的应力水平，分别发生两种失效模式（即由于大棘轮应变而导致明显颈缩的棘轮失效和由于响应应变幅接近恒定的低周疲劳而导致的疲劳失效）。 测试。
The ratchetting behaviour and fatigue failure, as well as their interaction were investigated by uniaxial cyclic stressing tests for SS304 stainless steel at room temperature. The ratchetting strain and fatigue life of the material were measured in different loading levels. The effects of mean stress, stress amplitude and stress ratio on the ratchetting strain and final failure life were discussed. Simultaneously, the variations of responded strain amplitude with the number of cycles were illustrated to discuss the interaction of ratchetting behaviour and fatigue failure. The experimental results show that the ratchetting strain and fatigue life of the material depend greatly on mean stress, stress amplitude and stress ratio of uniaxial cyclic stressing, and two kinds of failure modes (i.e., ratchetting failure with obvious necking due to large ratchetting strain and fatigue failure due to low-cycle fatigue with nearly constant responded strain amplitude) take place respectively, depending on the stress level prescribed in the tests.