Nano- and micromechanical modeling of nanoparticle reinforced epoxy resin

纳米颗粒增强环氧树脂的纳米和微观机械建模

• 批准号: 250787284
• 负责人: Professor Dr.-Ing. Raimund Rolfes
• 金额: --
• 依托单位: Institut für Statik und Dynamik
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/250787284?language=en
• 关键词: Nano; micromechanical; modeling; nanoparticle; reinforced

Within the research unit, a sequential multi-scale simulation for the prediction of thermo-mechanical material properties is developed, starting with particle/matrix interactions on the lowest scale (subproject 2) and considering the effects of nanoparticles on different scales up to fiber reinforced nanocomposites (subproject 5). In the first funding period, atomistic approaches, based on the Molecular Dynamic Finite Element Method (MDFEM) and continuum mechanical approaches have been combined for the calculation of the mechanical properties of nanoparticle reinforced epoxy resins, in order to contribute to component and material design as well as gain an understanding of the underlying mechanisms. In the second funding period, the focus in subproject 2 lies on the thermal and temperature-dependent mechanical properties, since the improved macroscopic shrinkage behavior is an essential target variable for the optimization of nanocomposites. Additionally, an improvement of the quality of prediction and an increasing independence of the model generation from experimental results are pursued. Therefore, methods for the generation of the chemical structure, especially concerning the particle/matrix interphase, based on fewer assumptions are developed. The focus lies on the continuous scale specific adaption and validation of the model generation, carried out via atomic force microscopy and dielectric spectroscopy results obtained from subproject 1.

在研究单元中，开发了用于预测热机械材料特性的顺序多尺度模拟，从最低尺度（subproject 2）上的粒子/基质相互作用开始，并考虑纳米颗粒对不同尺度的影响，直至纤维增强的纳米复合材料（subproject 5）。在第一个资金期间，基于分子动态有限元方法（MDFEM）的原子方法和连续机械方法已合并为计算纳米颗粒增强环氧树脂的机械性能，以便有助于成分和材料设计，并了解基础机制。在第二个融资期间，第2次的焦点在于热和温度依赖的机械性能，因为改善的宏观收缩行为是优化纳米复合材料的必不可少的目标变量。此外，追求了预测质量的提高和模型产生从实验结果中的独立性的提高。因此，基于较少的假设的发展，化学结构的产生的方法，尤其是与粒子/基质中的相互作用的方法。重点在于通过原子力显微镜和介电光谱法进行的连续规模的特定适应和模型产生的验证。