Micromechanics of Interacting Smart Composite Structures, Nano-Composites and Advanced Composite Materials

先进的复合材料和结构、纳米复合材料和智能结构在现代技术中的应用日益广泛，这就要求发展严格的建模、设计和优化技术。现有的力学模型通常是基于一定的近似和简化。因此，它们经常导致局部和有效属性的错误值。这些特性的准确计算是进行精细分析和优化设计的关键。本提案旨在解决这些问题。它包括在智能复合材料结构和纳米复合材料的建模、设计和优化方面的严格分析研究。它包括发展微观力学模型，能够研究微结构的影响，并考虑智能复合材料的非线性、各向异性、缺陷、相互作用、耦合场和驱动特性。智能复合材料结构的关键优势在于与环境的相互作用。它们以分布载荷的形式承受外部载荷，在许多应用中，以流体或气体相互作用的形式，即航空航天应用的空气和海军和石油/天然气应用的流体/天然气。因此，分析智能复合材料结构与环境的相互作用就显得尤为重要。早期研究的目的是在不考虑外部载荷的情况下计算有效性能。该方案在智能复合材料结构的单胞局部尺度的外载作用下，对细观力学模型的发展做出了重大的根本性创新。所提出的新的严格分析方法将允许考虑局部(单胞)水平上的所有相互作用，因为多尺度渐近齐化过程将被应用于严格公式的耦合三维边值问题。这种方法允许考虑表面几何的影响，与流体或气体在局部水平上的相互作用，特别是捕捉智能结构的每个单元单元内的致动器动作的影响。在本方案中特别关注先进的纳米复合材料。基于量子点的半导体纳米复合材料使其能够在科学技术中得到前所未有的应用。碳纳米管具有非凡的机械性能。为量子点基纳米复合材料和碳纳米管增强纳米复合材料建立了新的严格的细观力学模型。拟议的研究将是重大的基础性贡献，它将产生对加拿大工业在机械工程和基础设施领域创造新的退出机会具有高度现实意义的成果。该建议的主要特点是在前沿研究领域对HQP进行了高度培训。用5年时间培养2名博士、6名硕士和20名本科生。

Exceptional expansion in applications of advanced composite materials and structures, nano-composites and smart structures in the modern technology calls for the development of rigorous modeling, design and optimization techniques. The existing mechanical models are commonly based on certain approximations and simplifications. As a result, they often lead to wrong values of local and effective properties. Accurate calculation of these properties is essential for the refined analysis and optimal design. The present proposal is aimed to solve these issues. It consists of rigorous analytical studies in modeling, design and optimization of smart composite structures and nano-composites. It includes development of micromechanical models capable of investigating effects of micro-structure and taking into account non-linearity, anisotropy, defects, interaction, coupled fields and actuation properties of smart composite materials. The key advantage of smart composite structures is in interaction with the environment. They are subjected to external loading in the form of distributed loads and, in many applications, in form of fluid or gas interactions, i.e., air for aerospace applications and fluid/gas for naval and oil/gas applications. Therefore, it is foremost important to analyze the smart composite structures interacting with the environment. The purpose of earlier studies was calculating effective properties without taking into account external loading. The present proposal makes a very significant fundamental innovation in developing micromechanical modeling in the ensemble with the external loading on the local scale of unit cell of a smart composite structure. The proposed new rigorous analytical approach will allow taking into account all interactions on local (unit cell) level, as the multi-scale Asymptotic homogenization procedure will be applied to the rigorously formulated coupled 3D boundary-value problems. This method allows taking into account influence of the surface geometry, interaction with fluid or gas on local level, specifically capturing effects of actuator actions within each unit cell of the smart structure. Special attention is paid in the present proposal to the advancing nano-composites. Quantum dots-based semiconductor nano-composites enable never seen before applications to science and technology. The carbon nanotubes have extraordinary mechanical properties. The new rigorous micromechanical models will be developed for the quantum dots-based nano-composites and for the carbon nanotube reinforced nano-composites. The proposed research will represent major fundamental contribution, and it will generate results of a high practical importance to the Canadian industry in creating novel exiting opportunities in mechanical engineering and infrastructure. The major feature of the proposal is a high degree of training of HQP in the frontier research area. In five years 2 PhD, 6 Master and 20 undergraduate students will be trained.