项目名称: 冲击荷载下环氧树脂的微颗粒增韧机制实验和数值模拟研究
项目编号: No.11302054
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 数理科学和化学
项目作者: 梁文彦
作者单位: 哈尔滨工程大学
项目金额: 28万元
中文摘要: 探寻影响颗粒改性聚合物的动态破坏因素,揭示其在动态荷载下的增韧机制是材料在工程应用的关键问题。本项目以颗粒增韧环氧树脂材料的动态破坏机理为目标,力图建立颗粒增韧环氧树脂的动态冲击破坏规律。其主要研究内容为:(1)分别对"纳米/微米"颗粒增韧的环氧树脂材料进行动态冲击扩展实验研究,分析动态冲击破坏对微颗粒的敏感性,建立不同因素对动态破坏的影响规律;(2)采用高速摄像系统,分析在裂纹尖端颗粒增韧环氧树脂的动态冲击扩展断裂过程,研究不同因素下的微观破坏形貌,给出颗粒对增韧环氧树脂材料的动态微观失效特性,揭示动态冲击荷载下的微观增韧机制;(3)采用FCC数值分析模型,引入自编写的USDFLD损伤程序,重点研究在裂纹尖端"纳米/微米"颗粒增韧环氧树脂的损伤破坏过程。本项目采用实验结合数值模拟等方法,建立不同因素下的动态冲击破坏机制,其研究成果,可为颗粒改性环氧树脂在工程中应用提供技术支持。
中文关键词: 环氧树脂;微颗粒;损伤破坏;增韧机制;
英文摘要: To explore the factors influencing dynamic failure of particle-modified polymer and to reveal its toughening mechanisms under dynamic loading are the key problems of materials in engineering applications. The project purpose is to dynamic failure mechanisms of particle-toughened epoxy resin and further to establish the dynamic impact failure law of particle-toughened epoxy resin. The main research contents include: (1)The sensitivity of microparticle on dynamic impact failure is investigated by dynamic impact propagation experiments of nano/micro-scale particle-toughened epoxy resin and the influence of different factors on dynamic failure is analyzed; (2)Using high speed camera system, dynamic impact fracture process of particle toughened epoxy resin is analyzed, and the microscopic failure morphology under different factors is obtained, microscopic failure characteristics of particles toughened epoxy resin is given, the microscopic toughening mechanism under dynamic impact loads is revealed; (3)Using the FCC Numerical model and USDFLD damage program, Damage failure process of nano/micro particles-toughened epoxy resin is investigated. This project presents dynamic impact failure mechanisms of particle-toughened epoxy resin using experiment and numerical simulation method, its research results can provide refer
英文关键词: epoxy resin;micro-particles;damage failure;toughening mechanisms;