Analysis of the Crack Opening Displacement of a Surface Crack Using X-ray Tomography
Analysis of the Crack Opening Displacement of a Surface Crack Using X-ray Tomography
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利用 X 射线断层扫描分析表面裂纹的裂纹张开位移
DOI：
10.1016/j.mspro.2014.06.308
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发表时间：
1913
期刊：
影响因子：
--
通讯作者：
T. Vesper
中科院分区：
文献类型：
--
作者：
P. Pitz;F. Zeismann;A. Brueckner-Foit;J. Foit;B. Mattheis;T. Vesper
铁素体马氏体钢在完全反向加载下产生疲劳裂纹。试验继续进行，直到主裂纹达到与几个微观组织单元相对应的尺寸，从而变成一个连续增长的裂纹。在日本的SPring-8设施中，使用x射线断层扫描对含有一个主裂纹的小型化试样进行了切割和分析。裂缝扩展可采用梁内加载阶段进行研究。在预先设定的载荷周期内，中断疲劳试验，并在不同载荷水平下拍摄CT图像。因此，可以通过比较不同荷载水平下的ct结果来确定裂缝面的位移。这种比较可以使用数字图像相关（DIC）来完成。该方法目前被广泛应用于分析曲面上的变形场，但也可以推广到体积相关，由此可以导出三维位移。将该方法应用于CT结果，得到裂纹面位移的估计。另一方面，三维裂纹形状可以转换为CAD模型，而CAD模型又是有限元模型的基础。通过匹配相应的裂纹面位移值，可以对数字体积相关的结果进行验证。
sFatigue cracks were initiated in a ferritic martensitc steel under fully reversed loading. The test continued until the dominant cracks had reached a size corresponding to several microstructural units, and, consequently, had turned into a continuously growing crack. Miniaturized specimens containing one dominant crack were cut the test specimens and analyzed in the SPring-8 facility in Japan using X-ray tomography. Crack extension could be studied using an in-beam loading stage. A pre-defined load cycles, the fatigue test was interrupted and CT- images were taken at different load levels. Hence the displacement of the crack faces can be determined by comparing the CT-results at different load levels. This comparison can be performed using digital image correlation (DIC). This method is nowadays widely using in analyzing deformation fields on surfaces, but can also be generalized to volumetric correlation, from which the three-dimensional displacement can be derived. This method is applied to the CT results yielding estimates of the crack face displacement. The three-dimensional crack shape, on the other hand, can be transferred into a CAD model which, in turn, is the basis for a Finite Element model. Matching the corresponding values of the crack face displacement can be used to qualify the results of the digital volumetric correlation.
利用 FIB 断层扫描技术研究双相钢循环加载下的小裂纹行为
DOI：
--
发表时间：
2007
期刊：
Fatigue & Fracture of Engineering Materials and Structures 30
影响因子：
--
作者：
Y.Motoyashiki;A.Brueckner-Foit;A.Sugeta
通讯作者：
A.Sugeta
使用 X 射线断层扫描技术对钢进行高分辨率观察
DOI：
--
发表时间：
2012
期刊：
影响因子：
--
作者：
H. Toda;Fukuto Tomizato;F. Zeismann;Y. Motoyashiki;K. Uesugi;A. Takeuchi;Yoshio Suzuki;M. Kobayashi;A. Brueckner
通讯作者：
A. Brueckner