Notch root biaxial cyclic strain behavior of type 304 stainless steel at elevated temperature using laser speckle strain/displacement gauge
Notch root biaxial cyclic strain behavior of type 304 stainless steel at elevated temperature using laser speckle strain/displacement gauge
复制标题
使用激光散斑应变/位移计观察 304 型不锈钢在高温下的缺口根部双轴循环应变行为
DOI：
10.1299/jsmea.44.374
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
I. Nishikawa
中科院分区：
文献类型：
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作者：
H. Waki;K. Ogura;I. Nishikawa
开发了激光散斑双轴应变计来测量缺口根部的局部应变 ey、ez。在 673 K 和室温下的完全反向循环载荷下对单边缺口 304 型不锈钢样品进行了测量。根据所提出的缺口根部变形约束参数讨论了应变范围 Δey、Δez 以及它们的比率 φ=Δez/Δey，该参数由缺口根部半径、板的厚度和标称应力水平组成。结果发现，双轴应变比 φ 与所有测试缺口的建议参数唯一相关。还发现，在约束参数取足够大值的限制条件下，在整个疲劳寿命期间，观察到缺口根部应变范围没有变化。此外，还讨论了根据测量应变对诺伯定律的验证。
A laser speckle biaxial strain gauge was developed to measure local strains, ey, ez, at notch roots. Measurements were made on single edge-notched type 304 stainless specimens under fully reversed cyclic loading at both 673 K and room temperature. The strain ranges, Δey, Δez, and a ratio of those, φ=Δez/Δey, were discussed in terms of a proposed notch root deformation constraint parameter which consisted of a notch root radius, a thickness of the plate and a nominal stress level. It was found that the biaxial strain ratio, φ, was uniquely correlated with the proposed parameter for all the tested notches. It was also found that no change in the notch root strain range during the whole fatigue life was observed for the limited condition in which the constraint parameter took a sufficiently large value. Furthermore, the verification of Neuber’s rule in terms of the measured strain was discussed.
激光散斑混合模式位移和应变测量
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
Masashi Oonishi;Izuru Nishikawa
通讯作者：
Izuru Nishikawa