CAREER: Innovative Experimental Mechanics for Heterogeneous Construction Materials

9733769 Landis这个职业发展计划的主要主题是促进、推进和应用创新的实验分析技术来研究异质建筑材料。这一主题适用于该计划的研究和教育部分。混凝土和波特兰水泥基材料是这里的重点，但许多概念和开发的技术将适用于木材，岩石，复合材料和其他材料具有异质微观结构。本研究的目的是通过先进的实验和数据分析来量化水泥基材料中特定的微结构损伤和破坏机制。为了在模拟和预测失效机制的能力方面取得重大进展，我们必须对所涉及的物理微观结构过程有一个定量的了解。该研究解决了定量微观结构性能与性能数据的需求。教育工作的总体目标是更新土木工程本科和研究生课程中的实验力学和数据分析处理，并突出力学和材料在不同土木工程分支学科中的作用。这一目标将通过将新的课堂和实验室模块整合到现有的本科和研究生课程中来实现。教育计划的基石将是一门创新的大一建筑材料课程，在这门课程中，问题分析和设计的共同主题将以材料为载体介绍给新的工程专业学生。本课程的实验部分旨在揭示材料的微观结构和性能之间的关系。研究和教育部分之间的联系是创新地使用实验室。数值模拟的便捷性在不同程度上改变了实验分析在教育和研究中的应用。因此，本工作计划的目标是强调在“真实”而不是“虚拟”实验室中工作的力学和材料的重要性。由于这项工作是多学科的，因此计划与数字图像处理、水泥微观结构和x射线物理方面的专家合作。＊＊＊

9733769 Landis The primary theme of this career development plan is to promote, advance, and apply innovative experimental analysis techniques to heterogeneous construction materials. This theme applies to both the research and the educational components of the plan. Concrete and portland cement-based materials are the focus here, but many of the concepts and techniques developed will be applicable to wood, rock, composites, and other materials with a heterogeneous microstructure. The objective of the research is to quantify specific microstructural damage and failure mechanisms in cement- based materials through advanced experimentation and data analysis. In order for there to be significant advances in our ability to model and predict failure mechanisms, we must have a quantitative understanding of the physical microstructural processes involved. The research addresses this need for quantitative microstructural property versus performance data. The overall objective of the educational work is to update experimental mechanics and data analysis treatment in the undergraduate and graduate civil engineering curriculum, and to highlight the role of mechanics and materials in the different civil engineering subdisciplines. This objective will be realized through the integration of new classroom and laboratory modules into existing undergraduate and graduate courses. The cornerstone of the education program will be an innovative freshman level construction materials course in which the common themes of problem analysis and design are introduced to new engineering students using materials as the vehicle. The laboratory component of this course will be designed to reveal relationships between the material's microstructure and performance properties. The link between the research and education components is the innovative use of the laboratory. The ease of numerical simulations has in varying degrees altered the use of experimental analysis in both education and research. The goal of this workplan is therefore to emphasize the importance to mechanics and materials of working in "real" rather than "virtual" laboratories. As this work is multidisciplinary, collaborations with experts in digital image processing, cement microstructure and x-ray physics and planned. ***