CAREER: Research and Education on Advanced Multiscale Modeling-Analysis of Roadway Materials, Mixtures, and Infrastructure Systems

职业：道路材料、混合物和基础设施系统的高级多尺度建模分析研究和教育

• 批准号: 0644618
• 负责人: Yong-Rak Kim
• 金额: $ 40.2万
• 依托单位: University of Nebraska-Lincoln
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-05-15 至 2012-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0644618&HistoricalAwards=false
• 关键词: CAREER; Research; Education; Advanced; Multiscale

CAREER: Research and Education on Advanced Multiscale Modeling-Analysis of Roadway Materials, Mixtures, and Infrastructure SystemsPI: Yong-Rak Kim (University of Nebraska-Lincoln)AbstractThis CAREER project integrates research and educational programs and will focus on roadway materials and infrastructure systems to develop a multiscale computational model and associated experimental programs that accurately predict damage and failure of granular composites in general and asphaltic composites and pavements in particular. The broad goal is to seek state-of-the-art advances in the modeling, analysis, and design of various civil engineering geo-materials and infrastructure systems. Central to this effort is the proposed multiscale-computational approach that employs only the fundamental properties of the mixture constituents to predict damage-dependent behavior and service life of an entire structure. The approach minimizes modeling effort/cost and produces more accurate simulations than current phenomenological approaches. This study will provide better understanding and clear investigation of constituent-level material phenomena and their interactions on inelastic-nonlinear structural performance and distresses by successfully linking microstructural responses to macroscopic performance. Complementing these research efforts is the training of new engineers through an educational program that seamlessly incorporates new technologies and laboratories into the classroom, integrates experimentation with engineering fundamentals, and engages students especially those belonging to groups traditionally underrepresented in STEM in civil engineering. Based on fundamental findings from this study, roadway engineers and practitioners can improve traditional guidelines to select mixture constituents in a more appropriate way and are also capable of advancing current mix-design concepts, materials models, and performance prediction models that will eventually lead to improvements of mixture/structure designs. In addition, this study is potentially applicable in a broad range of other cases with damage-associated nonlinear inelastic mechanical behavior, such as geologic media, other construction materials and infrastructure systems, and various types of complex composites.

职业：先进的多尺度建模-道路材料、混合物和基础设施系统分析的研究和教育Yong-Rak Kim（内布拉斯加州林肯大学）摘要：这个职业项目将研究和教育项目结合起来，将重点放在道路材料和基础设施系统上，以开发一个多尺度计算模型和相关的实验项目，准确预测颗粒复合材料的破坏和破坏，特别是沥青复合材料和路面。广泛的目标是寻求各种土木工程土工材料和基础设施系统的建模、分析和设计方面的最新进展。这项工作的核心是提出的多尺度计算方法，该方法仅使用混合成分的基本特性来预测整个结构的损伤依赖行为和使用寿命。该方法最大限度地减少了建模工作/成本，并且比当前的现象学方法产生更准确的模拟。本研究通过成功地将微观结构响应与宏观性能联系起来，将更好地理解和清楚地研究成分级材料现象及其对非弹性-非线性结构性能和应力的相互作用。与这些研究工作相辅相成的是，通过教育计划培训新工程师，将新技术和实验室无缝地融入课堂，将实验与工程基础相结合，并吸引学生，特别是那些属于传统上在土木工程STEM中代表性不足的群体的学生。基于这项研究的基本发现，道路工程师和实践者可以改进传统的指导方针，以更合适的方式选择混合料成分，也能够推进当前的混合料设计概念、材料模型和性能预测模型，最终导致混合料/结构设计的改进。此外，该研究还可广泛应用于其他与损伤相关的非线性非弹性力学行为，如地质介质、其他建筑材料和基础设施系统，以及各种类型的复杂复合材料。