VAFW cylinders 2020, S1, S2, S4, S8, DIC raw data

The files contain the raw data obtained with digital image correlation (DIC) of variable-angle filament-wound (VAFW) cylinders. The data is used as an input for the stitching algorithm described in the paper: Castro, S. G. P., Almeida, J. H. S., Jr., St-Pierre, L., & Wang, Z. "Measuring geometric imperfections of variable-angle filament-wound cylinders with a simple digital image correlation setup". Composite Structures, 2021. 10.1016/j.compstruct.2021.114497 With the methodology developed and explained in the paper, the Python module https://saullocastro.github.io/dicpp/ is used to reconstruct the 3D imperfections of the entire shell. In the paper, the naming convention translates as follows. Cylinder name in the dataset <--> cylinder name in the paper: S1 <--> MA S2 <--> CA S4 <--> VAFW4 S8 <--> VAFW8 All coordinates (x,y,z) and the imperfection amplitude (imp) are in millimeters. The extracted topology of the cylinders for each circumferential position 0deg, 60deg, 120deg, 180deg, 240deg and 300deg are contained in the individual ".zip" files for each measurement, e.g. "S1-1-measurement-1.zip". Inside this ".zip" file there are files named as "S1-1-measurement-XXXdeg.csv". The large file "images.zip" contains all DIC pictures used for calibration and topology measurement, where: "S1-1-cal-XXX.tif" are the pictures used for calibrating the DIC system "S1-1-XXX.tif" are the pictures used to extract the cloud of points that represent the imperfect shell surface "S1-1-XXX.out" and "S1-1*.z3d" are binary files saved by the Vic3D system本数据集文件包含变角度纤维缠绕（variable-angle filament-wound, VAFW）圆柱的数字图像相关（digital image correlation, DIC）原始采集数据。该数据可作为下述论文中所述拼接算法的输入：Castro, S. G. P., Almeida, J. H. S., Jr., St-Pierre, L., & Wang, Z. "Measuring geometric imperfections of variable-angle filament-wound cylinders with a simple digital image correlation setup"，发表于《复合结构（Composite Structures）》，2021年，DOI: 10.1016/j.compstruct.2021.114497。 依托论文中提出并系统阐释的方法，可通过Python模块https://saullocastro.github.io/dicpp/ 重建整个圆柱壳的三维几何缺陷。论文中采用如下命名对应规则：数据集内圆柱名称 ↔️ 论文中圆柱名称：S1 ↔️ MA；S2 ↔️ CA；S4 ↔️ VAFW4；S8 ↔️ VAFW8。 所有坐标（x,y,z）及缺陷幅值（imperfection amplitude, imp）的单位均为毫米。 针对0°、60°、120°、180°、240°及300°六个周向位置提取的圆柱拓扑结构，存储于各测量任务对应的独立".zip"压缩包中，例如"S1-1-measurement-1.zip"。该压缩包内包含命名格式为"S1-1-measurement-XXXdeg.csv"的文件。 大型压缩包"images.zip"包含所有用于校准及拓扑测量的DIC图像，其中： "S1-1-cal-XXX.tif"为用于校准DIC系统的图像； "S1-1-XXX.tif"为用于提取表征缺陷圆柱壳表面的点云数据的图像； "S1-1-XXX.out"及"S1-1*.z3d"为Vic3D系统生成的二进制文件。