This paper provides a modeling method for predicting the internal structure of three-dimensional (3D) angle-interlock woven fabric. Inspired by the digital element method, the numerical model of micro-scale was established by using truss element. The numerical model was compared with the Computed Tomography (CT) cross-sectional scan of the actual fabric sample, and the results were consistent. The mechanical properties of the 3D angle-interlock woven fabric is closely related to the fabric’s structure. Therefore, by changing the tension at both ends of the yarn tows to explore the influence on the yarn tows’ geometry, it was found that different tensions affects the cross-sectional areas and crimp angles of the yarn tows. On the basis of fabric forming, multi-shape molds were designed to press the fabric into different shapes, which were semi-hexagonal, arc-shaped and L-shaped. The results of numerical simulation showed that the fabric will undergo inter-layer slip when compressed, especially in the region where the mold deformation is large.

本文提供了一种预测三维（3D）角度互锁机织物内部结构的建模方法。受数字元方法的启发，利用桁架元建立了微观尺度的数值模型。将数值模型与实际织物样品的计算机断层扫描（CT）横截面扫描进行比较，结果一致。 3D角度双面罗纹机织物的机械性能与织物的结构密切相关。因此，通过改变纱束两端的张力来探讨对纱束几何形状的影响，发现不同的张力对纱束的横截面积和卷曲角度有影响。在织物成型的基础上，设计了多形状模具，将织物压制成半六边形、弧形、L形等不同形状。数值模拟结果表明，织物在压缩时会发生层间滑移，特别是在模具变形较大的区域。