三原组织织物拉伸力学性能有限元仿真

为使织物在设计前就可预估其拉伸性能，对织物拉伸过程进行了有限元模拟和试验验证。通过超景深数码显微镜对织物试样的细观照片进行尺寸测量，得到纱线的几何结构参数，借助AutoCAD绘图软件建立了三原织物单胞物理模型；基于纱线拉伸试验和织物周期边界条件理论，利用有限元分析软件ANSYS研究了三原织物的拉伸性能；并将有限元仿真结果与拉伸试验结果进行对比。结果表明：织物经向拉伸时，经向平均应力、经向平均应变、纬向平均应变和泊松比的有限元模拟结果与试验结果的差异均在5%左右；经向弹性模量的有限元模拟结果与试验结果的差异也在10%以内；证明有限元仿真的可行性。

Finite element simulation on tensile mechanical properties of three-elementary weave fabric

In order to predict the tensile properties of fabrics, numerical simulations of fabric tensile process were studied by using finite element method, and corresponding experiment verification was presented. The geometry parameters of the fabrics were obtained by observing the morphology of the fabrics by means of super depth of field digital microscope VHX-5000 . The mechanical unit-cell models of the three-elementary weave were built by AutoCAD. Then, based on the experiment of yarn tensile and the periodic boundary conditions, the tensile properties of the three-elementary weave were studied using ANSYS software. Results of numerical simulations and experiments were compared. The results indicate that when fabrics are stretched along the warp direction, the error of warp average stress, warp average strain, weft average strain and poisson ratio between the simulated and the experimental results are all about 5%. Moreover, the error of warp elasticity modulus between the simulated and the experimental results is about 10%, verifying that numerical simulation using the finite element method is effective.