The present study aims at demonstrating the feasibility of performing a fracture test in less than 1 min in a laboratory CT scanner despite the severe time constraints of tomography acquisition. After introducing the basic concepts of projection-based digital volume correlation, the specific implementation of this methodology to a wedge splitting test on a refractory material is presented. The kinematics of the test is described over a mesh tailored to the sample geometry, and the elastic behavior of the sample is exploited through finite element computations to provide sensitivity fields of experimental boundary conditions to allow for their “measurements.” Enhancing the simulation to account for crack advance with extended finite element analyses allows the sensitivity of the procedure to the crack position to be assessed. A confidence interval for the refractory toughness is finally obtained.

中文翻译：

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在实验室CT扫描仪中进行亚分钟的原位断裂测试

本研究旨在证明尽管层析成像采集的时间受到严重限制，但在实验室CT扫描仪中不到1分钟即可执行断裂测试的可行性。在介绍了基于投影的数字体积相关的基本概念之后，介绍了该方法在耐火材料楔形劈裂测试中的具体实现。在针对样品几何形状定制的网格上描述了测试的运动学，并通过有限元计算来利用样品的弹性行为，以提供实验边界条件的灵敏度场以允许其“测量”。通过扩展的有限元分析来增强模拟以解决裂纹扩展，可以评估该程序对裂纹位置的敏感性。