X-ray stereo digital image correlation (DIC) measurements were performed at 10 kHz on the internal surface of a jointed structure in a shock tube at a shock Mach number of 1.42 and compared with optical stereo DIC measurements on the outer, visible surface of the structure. The shock tube environment introduces temperature and density gradients in the gas through which the structure was imaged, resulting in spatial and temporal index of refraction variations. These variations cause bias errors in optical DIC measurements due to beam-steering but have minimal influence on x-ray DIC measurements. These results demonstrate the utility of time-resolved x-ray DIC measurements in complicated environments where optical measurements suffer severe errors and/or are precluded by lack of optical access.

X 射线立体数字图像相关 (DIC) 测量在 10 kHz 频率下在激波管中的连接结构的内表面以 1.42 的激波马赫数进行，并与外部可见表面上的光学立体 DIC 测量进行比较。结构体。激波管环境在气体中引入了温度和密度梯度，通过该气体对结构进行成像，导致折射率的空间和时间变化。由于光束转向，这些变化会导致光学 DIC 测量中的偏置误差，但对 X 射线 DIC 测量的影响很小。这些结果证明了时间分辨 X 射线 DIC 测量在复杂环境中的效用，在这些环境中，光学测量会出现严重错误和/或由于缺乏光学通路而被排除。