蒙脱土／尼龙6纳米复合材料刚度预测

Stiffness Prediction of MMT/Nylon 6 Nanocomposites

本文采用交错模型对蒙脱土／尼龙6纳米复合材料的弹性模量进行预测。模型划分为四个区域:以拉伸变形为主的A(蒙脱土片)、B和D区,和同时承受拉伸和剪切两种变形的C区。通过对各区之间合力平衡和变形协调的简单分析,本文得到了封闭形式的蒙脱土／尼龙6纳米复合材料模量预测公式。引用文献[1]中的蒙脱土材料的几何参数和弹性常数,以及纯尼龙6的弹性常数,对纳米复合材料的模量进行预测,预测结果与实验结果基本吻合。有限元法对交错模型的分析证实了理论模型中变形区划分的合理性,同时也发现FEM的预测结果与实验更为接近。

A staggered model was introduced in stiffness prediction of MMT/nylon 6 nanocomposites. The model was partitioned into four regions, where region A （MMT platelet）, B and D stand tensile deformation, and region C stands both tensile and shear deformation. According to the analysis of forces equilibrium and compatibility of deformations among four regions, a formula calculating the stiffness of nanocomposites was obtained. The stiffness was predicted by using the geometric parameters of MMT platelet and elastic modulus of MMT and nylon 6 in reference Eli. The prediction results is accordant to the experimental results approximately. Finite element method was adopted in the analysis of staggered model. The FEM results show the reasonable of regions partition in staggered model and the more closing stiffness prediction results as comparing with the experimenta! results.