GOALI: A Hybrid Failure Approach using Digital Image Correlation for Functionally Graded Thin-Bonded Overlays

在美国，有超过260万英里的铺装道路，其中94.6%是沥青混凝土路面，这意味着每年的投资300亿美元。沥青加铺层过早开裂给社会带来了巨大的经济和环境负担，并会降低我国S高速公路和机场道面基础设施的安全。在这项GALI研究中，大学和行业之间拟议的合作伙伴关系将导致开发先进的路面修复系统(薄的、粘结的覆盖层)，这些系统是可回收的、可持续的，并提供安全的骑行表面。拟议的工作计划将采用混合办法，包括先进的实验室测试和仪器、开发新的损坏模型、路面系统的模拟以及模型对实地性能的校准。这个项目还将改进如何使用数字成像来了解复杂、分层、复合基础设施材料系统中的断裂行为。除了上述在发现和理解方面的进步外，拟议项目的更广泛影响是：通过将研究成果纳入大学课程，促进教学、培训和学习；通过少数民族外联计划和世界青年科学与工程计划，扩大代表不足的群体对研究的参与；以及在期刊上、通过会议演示和研讨会广泛传播研究成果。拟议的研究对社会的好处包括：更可持续的路面维护方法；降低生命周期成本；以及改善公路安全。通过与工业界的伙伴关系，将针对实地项目对新技术进行验证，并通过区域讲习班将其转让给从业人员。

In the United States, there are over 2.6 million miles of paved roads 94.6% of which have an asphalt concrete surface, representing a $30 billion annual investment. Premature fracturing of asphalt overlays poses a significant economic and environmental burden to society and can reduce the safety of our nation?s highway and airfield pavement infrastructure. The proposed partnership between university and industry in this GOALI study will lead to the development of advanced pavement rehabilitation systems (thin, bonded overlays) that are recyclable, sustainable, and provide a safe riding surface. The proposed work plan will utilize a hybrid approach, involving advanced laboratory testing and instrumentation, development of new damage models, simulation of pavement systems, and calibration of models to field performance. This project will also improve how digital imaging can be used to understand fracture behavior in complex, layered, composite infrastructure material systems.Besides the aforementioned advancement in discovery and understanding, the broader impacts of the proposed project are: the promotion of teaching, training, and learning, through incorporation of research results in university courses; broadened participation in research by underrepresented groups through Minority Outreach Program and the Worldwide Youth in Science and Engineering Program; and; broad dissemination of research results in journals, and through conference presentations, and workshops. The benefits of the proposed research to society include: a more sustainable approach to pavement maintenance; reduced life cycle costs, and; improved highway safety. Through partnership with industry, the new techniques will be validated against field projects and transferred to practitioners through regional workshops.