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基于三维四向编织携纱器运动规律和内部纤维束受力分析,提出一种基于能量法的细观建模方法,将建模过程分解为纤维束打紧后控制点的调整、纤维束相互挤压缠绕空间位置的改变和应变能最小时纤维束轨迹的确定.通过单胞模型几何尺寸分析,建立了单胞模型与编织参数之间的对应关系.该建模方法得到的纤维束模型互不干涉且紧密压实,纤维束轨迹为空间曲线与其两条相切直线组成,轨迹接近直线.通过实验对比,纤维束轨迹、模型横截面图与电镜扫描得到的图像一致,计算得到的编织结构尺寸与实验测得数据吻合.花节长度最大计算相对误差在5%左右,特别是编织角在21°左右时,计算相对误差在2%以下.
Based on the movement rule of three-dimensional weft-knitted yarn carrier and the analysis of internal fiber bundle stress, a method of mesoscopic modeling based on energy method is proposed, which decomposes the modeling process into the adjustment of the control points after tightening the fiber bundles. The change of the space position of the compression winding and the determination of the fiber bundle trajectory when the strain energy is minimized.The correspondence between the cell model and the weaving parameters is established by the cell size analysis.The fiber bundle models obtained by this modeling method are independent of each other Interference and compact compaction, fiber bundle trajectory space curve and its two tangent straight line, the trajectory close to a straight line through the experimental comparison, fiber bundle trajectory, cross-sectional model and electron microscopy image obtained by scanning the calculated structure size Which is in good agreement with the experimental data.The relative error of the maximum calculation of flower section length is about 5%, especially when the braid angle is about 21 °, the relative error is less than 2%.