对橡胶增韧环氧树脂的增韧机理模型进行了 回顾。其主要增韧机理为局部剪切屈服、孔洞或空穴的塑性体积膨胀和橡胶颗粒桥联。在细 观结构上采用典型轴对称单元的有限元分析来预测增韧环氧树脂的力学行为。断裂力学的J 积分模型可用于估算增韧程度,基于断裂韧性GIC的增韧模型定量分析已取得一定进展。
The model of toughening mechanisms of rubb er-toughened epoxy resins was reviewed. The main toughening mechanisms were ver ified as localized shear yielding, plastic growth of the viod or the hole and th e rubber bridging mechanisms. The analysis of the finite element method using th e axisymmetric model was employed to assess the mechanics behavior of the rubber toughening in mesostructure. The J-integral model could evaluate the rubbe r toughening degree based on the fracture mechanics. The quantitative model base d on the fracture toughness GIC had made some advances as well.
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