Continuum-Based Modeling of the Mechanical Behavior of Nanocomposites via Microstructure and Elasticity Theory for Solid Surfaces

通过固体表面的微观结构和弹性理论对纳米复合材料的机械行为进行基于连续体的建模

• 批准号: RGPIN-2017-03716
• 负责人: Schiavone, Peter
• 金额: $ 1.82万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=680394
• 关键词: Continuum; Based; Modeling; Mechanical; Behavior

Over the last few decades, the use of composite materials has revolutionized the face of industry. This can be attributed to the fact that since composites are made from different materials with distinct properties, they can be specifically designed for key manufacturing objectives including enhanced mechanical performance, environmental resistance and energy conservation. In the same way, nanocomposites are now transforming the world of composite materials allowing for the development of a new generation of composites with enhanced functionality and extended application ranging from biomedical applications to the enhancement of structural materials, electronic packaging and environmental protection. Nanocomposites are composite materials in which structures with nanoscale dimensions (smaller than a millionth of a meter), for example, nanoparticles or nanofibers, are embedded in a metal, ceramic or polymer base. This combination generates a synergy between the various constituent parts of the nanocomposite which leads to amazing mechanical properties. For example, if less than 1% (by weight) of nanoparticles is embedded in a traditional polymeric material, it becomes possible to design a new transparent, flexible, electrical conducting polymer. In the same way, we can design new multifunctional polymer-matrix nanocomposites with increased durability (100 times improved wear resistance), increased toughness and strength and increased thermal stability. In the multi-billion dollar flexible packaging industry, polymer nanocomposite technology is being used to enhance package performance and to address packaging waste.*** *Advances in composites engineering have always relied on mathematical models which are used at low cost to predict material behavior under certain mechanical and environmental conditions. These models are traditionally based on a particular simplifying assumption that the fine or micro- structure of the material can be ignored. Experiments have shown that this works well when we never have to consider material behavior at dimensions close to those of the material's fine structure. Unfortunately, this is not the case for nanocomposites where the length scales involved are so small that they make traditional mathematical models obsolete.*** *My research program focuses on the modeling of nanocomposite materials by developing new mathematical models that can accommodate the fine structure of materials and hence the corresponding material behavior at the nanoscale. This will greatly enhance our ability to design and develop new nanocomposites.*** *This grant will allow for the training of at least two PhD and three MSc students in this exciting and challenging multidisciplinary area. The findings of the research will be beneficial to a range of Canadian advanced technology companies in advanced construction materials, electronics and information technology.

在过去的几十年中，复合材料的使用彻底改变了行业的面貌。这可以归因于以下事实：由于复合材料是由具有不同特性的不同材料制成的，因此可以专门设计用于关键制造目标，包括增强的机械性能，环境阻力和节能。同样，纳米复合材料现在正在改变复合材料的世界，允许开发具有增强功能和扩展应用的新一代复合材料，从生物医学应用到增强结构材料，电子包装和环境保护。纳米复合材料是复合材料，其中具有纳米级尺寸的结构（小于一百万米），例如，纳米颗粒或纳米纤维嵌入金属，陶瓷或聚合物基础中。 这种组合在纳米复合材料的各个组成部分之间产生协同作用，从而导致惊人的机械性能。例如，如果将纳米颗粒的少于1％（按重量）嵌入传统的聚合物材料中，则可以设计一种新的透明，柔性，电气导电聚合物。以同样的方式，我们可以设计新的多功能聚合物 - 矩阵纳米复合材料，具有耐用性提高（提高耐磨性），韧性和强度增加100倍，并增加了热稳定性。在数十亿美元的灵活包装行业中，聚合物纳米复合材料技术用于增强包装性能并解决包装浪费。****复合材料工程的进步始终依赖于数学模型，这些模型以低成本用于预测某些机械和环境条件下的物质行为。传统上，这些模型是基于一个特定的简化假设，即可以忽略材料的良好或微结构。实验表明，当我们不必考虑材料良好结构的材料行为时，这很好。不幸的是，对于纳米复合材料而言，这种情况并非如此，因为纳米复合材料涉及的长度尺度很小，以至于它们使传统的数学模型过时了。这将大大提高我们设计和开发新的纳米复合材料的能力。这项研究的发现将对一系列加拿大高级建筑材料，电子和信息技术的加拿大先进技术公司有益。