Dynamic Response and Stochastic Mechanics of Composite Materials and Structures

由轻质纤维增强复合材料制成的机械和结构部件越来越多地用于机械、汽车、航空航天、发电和传输，包括绿色能源、体育器材、娱乐和土木基础设施工程应用。然而，在绝大多数此类应用中，静态和准静态组件的应用已经完全发展到所需的可靠性和安全性水平。此外，这些组件已经为高性能进行了优化。这与动态组件不同。造成这种限制的原因是，在此类应用中遇到的时变服务负载下，复合组件的动态响应和相关不稳定性尚未得到充分的研究和理解。

Mechanical and structural components made of lightweight fiber-reinforced composite materials are increasingly being used in mechanical, automotive, aerospace, power generation and transmission including green energy, sporting equipment, recreational, and civil infrastructure engineering applications. However, in vast majority of such applications, applications to static and quasi-static components have been fully developed to the required reliability and safety levels. Also such components have been optimized for high performance. This is not the case with dynamic components. The reason for this limitation is that the dynamic response and associated instabilities of composite components under the time-varying service loadings encountered in such applications have not yet been adequately studied and understood. The applicant has developed a long-term research program to address this limitation and with the goal of conception, design and development of innovative high-performance composite components for practical applications. The long-term objectives of this research program have been: (1) To conceptualize safe, reliable, cost-effective, innovative and high-performance composite components and structures; (2) To determine accurately the critical failures, dynamic response, and dynamic instabilities of such components and structures; (3) To develop optimal cost-saving designs for desired reliability, safety and performance requirements of such components and structures. Significant progress has been made in the research program over the past two decades. Over the next five years, intensive and innovative research on a certain specific class of advanced composite structures, called “tapered composite structures” will be conducted. Emphasis will be placed on rotating tapered composite beams and spinning shafts, and flat and curved composite plates. Samples of such composite beams and plates will be manufactured and tested for vibration response and failures. Advanced computational modeling and the stress, dynamic and failure analyses for design of such structures will be conducted. The cost-effective design of innovative composite beams, shafts and plates will be performed. A number of undergraduate and graduate students will be recruited and trained in the research. Industrial collaboration and international networking will be actively sought and used. The proposed research will serve significantly the Canadian engineering industries in making them even more globally competitive and profitable, and hence contributes significantly to the economic development of Canada. It also serves the Canadian academic sector in attracting and training globally-competitive, highly skilled, and very talented students and engineers. High quality cutting-edge research will be conducted and published in international research media and meetings.