六角形编织物的微观结构模拟

为研究第2代六角形编织物的复杂结构并预测其性能,利用MatLab软件设计出一套可直接模拟六角形编织物细观结构的算法,得到了可很好地反映编织结构的模型。根据第2代六角形编织角轮和转换装置的运动规律,推演携纱器的运行路径,编写出模拟携纱器行走路线的代码程序。通过编织轴向的路程计算,获得纱线运动的空间路径,并利用B样条法对空间路径进行优化,最后运用Solidtube函数进行实体化模拟,实现了细观结构的可视化。本文算法基于最基本的角轮与转换装置的关系编写,对于六角形编织物结构模拟具有普适性;同时进行了不同六角形预制件的编织实验发现,实验成品与模拟编织结构吻合度高,验证了算法的准确性。

Meso-structure simulation of hexagonal braiding preforms

In order to study the complex structure of second generation of hexagonal braiding fabrics and predict its performance,an algorithm for simulating meso-structure was created for simulation using MatLab,which led to the establishment of models reflecting clearly the meso-structure.On the basis of the motion pattern of the second generation machine′s horn gear,motion path of carriers was deduced which was used for coding.The trajectory of the yarn carrier were optimized through the use of B-spline,and Solidtube functions were used to carry out the simulation,leading to the visualization of the micro-structure.The algorithm in this text was designed on the basis of the most fundamental relation between horn gears and switch,thus it is universal to simulate hexagonal braiding structure,and the structure created by the algorithm to simulate also provided a better tool for unit cell division in finite element method.The braiding experiments of different hexagonal preforms were carried out.The results show that appearance of the simulated braiding structure resembles the experimental products,which verifies the accuracy of the algorithm.