A synchrotron computed tomography dataset for validation of longitudinal tensile failure models based on fibre break and cluster development

We performed in-situ tensile tests on two carbon fibre/epoxy composites with continuous scanning using synchrotron computed tomography (CT). Both composites were cross-ply laminates, and two specimens were tested for each composite. The voxel size was sufficiently small to recognize individual fibres and fibre breaks. For each test, 16-19 volumes were reconstructed, cropped down to the 0° plies and analysed to track fibre break and cluster development. This dataset provides the last CT volume before failure for each of the four specimens as well as the individual fibre break locations in all reconstructed volumes. These data are then plotted against predictions from six state-of-the-art strength models. The target is that these data become a benchmark for the development of new models, inspiring researchers to set up refined experiments and develop improved models.

本研究采用同步辐射计算机断层扫描（CT）对两种碳纤维/环氧树脂复合材料开展原位拉伸试验，试验全程采用连续扫描模式。两种复合材料均为正交铺层层合板，每种复合材料各测试2个试样。试验所用的体素尺寸足够小，可清晰分辨单根纤维与纤维断裂点。每次试验共重建16~19组扫描体积数据集，将其裁剪至0°铺层区域后开展分析，以追踪纤维断裂与断裂簇的演化过程。本数据集包含4个试样各自失效前的最后一组CT扫描体积数据，以及所有重建体积数据中单根纤维断裂的位置信息。随后将上述数据与6种当前顶尖强度模型的预测结果进行对比绘图。本数据集旨在成为新型强度模型开发的基准数据集，以期激励研究者开展更精细的试验，并开发性能更优的模型。