Research data of manuscript "Universal Characteristics of Local Strain Fields for Creep Failure Prediction"

> Each experiment folder (Test_1, Test_2, Test_3, Test_4) contains raw DIC images, corresponding strain maps (in the direction of the y-axis loading), and data from the testing machine. The naming of subfolders is consistent across all experiment folders. > Images were captured at a rate of 30 frames per second. The file named "frame.000000.png", located in the "DIC_raw_images" subfolder, is the reference image, captured from the surface of the sample before the start of the experiment. The next image after the reference image corresponds to the beginning of the primary creep phase, captured at the maximum load of the initial load ramp, when the load is stabilized at a constant level. > The subfolder "DIC_strain_maps_eyy" contains strain maps in numerical format, generated from the raw DIC images. The filenames include a suffix that corresponds to the index of the related DIC image. For example, the file "frame.000000_frame.000558.txt" is the strain map produced from the image "frame.000558.png". > The "machine_data.xlsx" file in each folder contains data recorded by the testing machine. Note that the dataset includes the entire process, including the initial load ramp. The beginning of the primary creep phase can be identified by locating the index corresponding to the maximum load.每个实验文件夹（Test_1、Test_2、Test_3、Test_4）均包含原始DIC（Digital Image Correlation，数字图像相关）图像、对应y轴加载方向的应变图，以及试验机采集的实验数据。所有实验文件夹的子文件夹命名规则保持一致。 图像采集帧率为30帧每秒。位于"DIC_raw_images"子文件夹中的"frame.000000.png"文件为参考图像，采集于实验开始前的试样表面。参考图像后的首张图像对应主蠕变阶段的起始时刻，此时载荷已稳定至恒定水平，该图像采集于初始加载斜坡的最大载荷点。 "DIC_strain_maps_eyy"子文件夹中存放由原始DIC图像生成的数值格式应变图，文件名后缀与对应DIC图像的索引编号相匹配。例如，"frame.000000_frame.000558.txt"即为由"frame.000558.png"图像生成的应变图。 每个实验文件夹中的"machine_data.xlsx"文件存储了试验机记录的实验数据。需注意，本数据集涵盖了完整的实验过程，包括初始加载斜坡阶段。可通过定位与最大载荷对应的索引，确定主蠕变阶段的起始点。