增强橡胶界面层对材料力学性能影响的RVE计算

Simulation of Effect of Interface Layer of Carbon Black Reinforced Rubber on Mechanical Properties of Composites by RVE

炭黑粒子与橡胶间相互作用的界面层对弹性体复合材料力学性能有重要影响。通过建立包含炭黑、橡胶基体及其界面层在内的三维RVE模型,借助有限元计算,研究了不同界面层厚度、界面层与基质不同模量比情况下弹性体复合材料的力学性能。研究发现,在一定范围内,界面层厚度及界面层模量与基质模量比值的变化都对复合材料体系的应力和模量有影响,计算条件下各组分承受应力由大到小的顺序为:颗粒内部应力>界面层应力>基体应力。

The impact of the interface layer between the rubber and the earbon black particles on the mechanical properties of the elastomeric composite is very important. A three-dimensional RVE model was proposed,which consists of the matrix rubber,the carbon black and their interracial layer. By means of finite element method, the mechanical properties of composite under different thickness of interface layer and different ratio of interface layer modulus and matrix modulus were studied respectively. It was found that under a certain condition, both thickness and modulus of the interfacial layer could change stress and modulus of the composite, and the components stress in descending order： the particles 〉 interface layer 〉 matrix rubber.