基于ABAQUS的筒状纬编针织物拉伸力学性能模拟

为更好地了解筒状纬编针织物抵抗拉伸变形的能力,基于对织物试样尺寸测量得到的几何结构参数,借助Rhino 3D建模软件建立了纬编针织物线圈模型和筒状纬编针织物模型;同时利用有限元分析软件ABAQUS在单位线圈和筒状织物2个方面研究了筒状纬编针织物的纵向拉伸性能;对织物拉伸过程进行有限元模拟和实验验证,并对针织物拉伸过程中纱线形变和应力分布进行探讨,将有限元仿真结果和拉伸实验结果进行对比分析。结果表明:筒状针织物纵向拉伸时,发生线圈转移和纱线伸长现象,其形变和应力变化的有限元分析结果描述准确,应力-应变数值计算结果与实验结果的差异在8%以内,证明有限元仿真的可行性。

Simulation on tensile properties of tubular weft knitted fabrics based on ABAQUS

In order to better understand the tensile deformation capability of tubular weft knitted fabrics,a three-dimensional weft knitted fabric loop model and a tubular weft knitted fabric model were established using a three-dimensional modeling software Rhino,on the basis of the measured fabric structure parameters.The tensile properties of the fabric were simulated on unit loop level and tubular fabric level using the finite element analysis software ABAQUS.Numerical simulations of fabric tensile process were studied and corresponding experiment verification was carried out.Deformation and stress distribution of yarns in the stretching process of knitted fabrics were analyzed and discussed.The results indicate that when fabrics are stretched along the length direction,the finite element analysis results of its deformation and stress change are described accurately compared to the experimental results.Moreover,the difference in stress and strain values between the simulated and the experimental results is about 8%,indicating that the numerical simulation is feasible and effective.