The large deformation tensile stress-strain response of graphene nanocomposites was investigated, whereby Polyvinyl alcohol (PVA) - graphene oxide (GO) nanocomposites with different GO concentrations were prepared, and subjected to quasi-static tension. Test results indicate that the normal stress on the GO filler phase does not increase for global strains beyond about 0.05. This was confirmed by subjecting specimens to different degrees of tension and examining them via Raman spectroscopy. The change in stress of GO filler is attributed to interfacial slip between the filler and matrix. Adoption of the Mori-Tanaka (M-T) simulations at the microscale is unable to reproduce the experimental stress-strain response of the nanocomposites when slip between the matrix and filler occurs, since perfect bonding between them is assumed in the M-T perspective. Consequently, an interfacial slip model was formulated and incorporated into the M-T method, and good agreement between the modified model and experiments was observed.

研究了石墨烯纳米复合材料的大变形拉伸应力-应变响应，从而制备了GO浓度不同的聚乙烯醇（PVA）-氧化石墨烯（GO）纳米复合材料，并对其施加了准静态张力。测试结果表明，GO填充相的法向应力不会超过约0.05的整体应变而增加。通过对样品施加不同程度的张力并通过拉曼光谱法对其进行检查来证实这一点。GO填料的应力变化归因于填料与基体之间的界面滑移。当在基质和填料之间发生滑移时，采用微米级的Mori-Tanaka（MT）模拟无法重现纳米复合材料的实验应力-应变响应，因为从MT角度出发，假设它们之间是完美的结合。因此，制定了界面滑移模型并将其合并到MT方法中，并观察到改进的模型与实验之间的良好一致性。