Auxetic fabrics have many potential applications in technical textiles. Auxetic 3D warp-knitted spacer fabric can be produced by adoption of some special geometrical configuration. Characterization of the geometrical configurations is of vital significance to understand their auxetic property. In this paper, a typical 3D auxetic warp-knitted spacer fabric was studied by synchrotron radiation x-ray computed tomography (SR-CT). Fiber distribution in the fabric was clearly obtained and different types of yarn were extracted separatively. 3D image reconstructed by synchrotron radiation X-ray computed tomography was consistent with the designed geometrical configuration. Besides, 3D model reconstructed lays the foundation for further numerical analysis by FEA.

辅助织物在工业用纺织品中有许多潜在的应用。辅助3D经编间隔织物可以通过采用一些特殊的几何构造来生产。几何构型的表征对于理解其膨胀特性至关重要。在本文中，通过同步辐射X射线计算机断层扫描（SR-CT）研究了一种典型的3D膨松经编间隔织物。清楚地获得了织物中的纤维分布，并分别提取了不同类型的纱线。通过同步辐射X射线计算机断层摄影术重建的3D图像与设计的几何构型一致。此外，重建的3D模型为有限元分析的进一步数值分析奠定了基础。