Biaxial Low Cycle Fatigue for Notched, Cracked, and Smooth Specimens at High Temperatures
Biaxial Low Cycle Fatigue for Notched, Cracked, and Smooth Specimens at High Temperatures
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高温下缺口、裂纹和光滑样品的双轴低周疲劳
DOI：
10.1115/1.3226009
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发表时间：
1988
影响因子：
1.2
通讯作者：
N. Hamada
中科院分区：
文献类型：
--
作者：
M. Sakane;M. Ohnami;N. Hamada
对 304 型不锈钢的有缺口、预裂纹和光滑空心圆柱形样品在空气中于 923K 下进行了推拉和反向扭转试验。本文描述了三种类型试件的裂纹方向以及与双轴低周疲劳失效数据相关的参数。除反向扭转试验中的光滑试样外，所有类型的试样均因 I 型裂纹而失效。结合裂纹模式讨论了样本的失效寿命。基于 COD 的等效应力可以关联双轴疲劳数据，而 Mises 的等效应力和最大主应力则不能。
Push-pull and reversed torsion tests were carried out for notched, precracked, and smooth hollow cylindrical specimens of type 304 stainless steel at 923K in air. This paper describes the crack direction in the three types of specimens and the parameter that correlates the biaxial low cycle fatigue failure data. All types of specimens, except the smooth specimen in the reversed torsion test, failed by mode I cracking. Failure life of the specimens was discussed in connection with the crack mode. The equivalent stress based on COD could correlate the biaxial fatigue data whereas the Mises’ equivalent stress and the maximum principal stress could not.