Multiscale Modeling of Advanced Materials and Manufacturing Processes in Design and Development of Lightweight Structures

从降低运营成本到改善环境影响，使用轻质结构（LWS）的设计对于许多行业的成功至关重要，包括航空航天，生物医学和核能。无论是设计更轻的机身以提高飞机燃油效率，还是提高生物医学植入物和假肢的强度重量比，LWS都在未来技术的发展中发挥着重要作用。拟议的研究，将进行涉及当前的扩展，以及新的多尺度模拟方法的发展动态高温建模的先进材料和制造工艺的设计和开发LWS。多尺度模拟涉及解决在多个长度和时间尺度上具有重要特征的问题，以便从分子到组件水平准确地建模系统。新型LWS技术的多尺度建模变得至关重要，因为LWS越来越多地与涉及增材制造和纳米制造的先进制造方法相关联。这些方法通过在宏观和纳米尺度上发生的过程来构建组件级几何形状，因此需要多尺度方法来准确预测所得到的组件特性和行为。通过多尺度建模进行LWS设计，沿着LWS先进制造新工艺的出现，代表了目前处于研究和开发关键阶段的技术进步。为了发展这一领域，有必要开发创新的模拟技术，可以解释作用于多个长度和时间尺度的独特而复杂的物理效应，同时减少目前对耗时和昂贵的实验的依赖。这些问题包括与动态原子到连续体尺度建模相关的时间尺度限制，长度和时间尺度之间的热特性的无缝转移，并发多尺度模型域的自适应调整，以及将纳米到微米尺度建模与微观到宏观尺度模拟桥接。为了满足这些需求，拟议的研究计划将开发新的动态多尺度建模技术，以及申请人在UofT的研究实验室中已经建立的经过验证的多尺度技术，以研究先进材料的机械行为和用于LWS设计和开发的制造方法。不断增长的需求沿着航空航天、生物医学和核工业中先进材料和制造工艺的日益集成，将确保通过精确的多尺度建模技术设计和实施LWS将有助于促进加拿大和这些行业中具有强大影响力的国家的经济增长。

From reduced operational costs to improved environmental impact, design using lightweight structures (LWS) is critical to success in many industries including aerospace, biomedical, and nuclear. Whether it is designing a lighter airframe to improve aircraft fuel efficiency or increasing the strength-to-weight ratio of biomedical implants and prosthetics, LWS play a significant role in the development of future technologies. The proposed research that will be conducted involves the expansion of current as well as the development of new multiscale simulation methods for dynamic high temperature modeling of advanced materials and manufacturing processes in the design and development of LWS. Multiscale simulation involves solving problems that have important features at multiple length and time scales in order to accurately model the system from the molecular to the component level. Multiscale modeling of novel LWS technologies is becoming essential as LWS are increasingly being associated with advanced manufacturing methods involving additive manufacturing and nanofabrication. These methods build component level geometries through processes that occur on the macro- and nanoscales and thus require a multiscale approach to accurately predict the resulting component properties and behaviour. Design for LWS through multiscale modeling, along with the advent of new processes for advanced manufacturing of LWS, represents a technological advancement that is currently in a critical stage of research and development. To grow this area, there is a need to develop innovative simulation techniques that can account for the unique and complex physical effects that act on multiple length and timescales, while reducing the current reliance on time consuming and expensive experiments.However, a number of existing issues within the field of multiscale modeling persist. These issues include timescale restrictions associated with dynamic atomistic-to-continuum scale modeling, seamless transfer of thermal properties between length and time scales, adaptive resizing of concurrent multiscale model domains, and bridging nano- to micro-scale modeling with micro- to macroscale simulations. To meet these needs, the proposed research program will develop novel dynamic multiscale modeling techniques, together with proven multiscale techniques already established within the applicant's research lab at UofT, to investigate the mechanical behaviour of advanced materials and manufacturing methods used in the design and development of LWS. The growing demand along with the increased integration of advanced material and manufacturing processes in aerospace, biomedical, and nuclear industries will ensure that design and implementation of LWS through accurate multiscale modeling techniques will help promote economic growth in Canada and countries with a strong presence in these industries.