In order to determine the thermo-mechanical properties of a complex 3D woven ceramic composite material, an experiment at high and inhomogeneous temperature and its dedicated full-field measurement procedure is developed. 3D tomographic images of the tested sample are captured at different stages of loading in a synchrotron beamline, and an infrared camera captures a side view of the sample as it rotates in the X-ray beam. A pin-hole projective model of the thermographic camera allows one to map the thermal field measured under numerous orientations onto a 3D mesh of the sample built from an initial tomographic image or a model. The projective model has to be calibrated, and an original procedure is proposed thanks to an integrated digital image correlation algorithm based on the "silhouette" of the sample (as only the protruding edges outlining the sample shape can be seen clearly). This procedure is illustrated with an experimental case study.

中文翻译：

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用于原位热机械测试的耦合断层扫描和热成像测量

为了确定复杂 3D 编织陶瓷复合材料的热机械性能，开发了高温非均匀温度实验及其专用的全场测量程序。测试样品的 3D 断层图像是在同步加速器光束线的不同加载阶段捕获的，红外摄像机在样品在 X 射线束中旋转时捕获样品的侧视图。热像仪的针孔投影模型允许将在多个方向下测量的热场映射到从初始断层图像或模型构建的样本的 3D 网格上。必须校准投影模型，并基于“剪影”的集成数字图像相关算法提出了原始程序 样品（因为只能清楚地看到勾勒出样品形状的突出边缘）。这个过程通过一个实验案例研究来说明。