CAREER: Creating Tough, Sustainable Materials Using Fracture Size-Effects and Architecture

职业：利用断裂尺寸效应和架构创造坚韧、可持续的材料

• 批准号: 2339197
• 负责人: Lucas Meza
• 金额: $ 73.57万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-07-01 至 2029-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2339197&HistoricalAwards=false
• 关键词: CAREER; Creating; Tough; Sustainable; Materials; CAREER; Creating; Tough; Sustainable; Materials

Materials for a sustainable economy should take little energy to produce, be sustainably sourced, and be easily recycled or reused. Few materials satisfy these criteria while also being strong and tough enough for broad use in engineering. To solve this, one can take inspiration from natural materials, which are made to be both renewable and durable by using precise nano- and microstructures. This Faculty Early Career Development (CAREER) award supports fundamental research for creating strong, tough, and sustainable materials through new knowledge of small-scale fracture in architected materials. Bio-derived and/or biodegradable materials will be created with precise microstructures using advanced manufacturing tools. Mechanical testing and computer modeling on both small- and large-scale materials will reveal how cracks grow and propagate in complex structures. This knowledge will be used to inform the design of new sustainable materials for aerospace, construction and automotive industries. It will further be used to develop new programs and courses for promoting sustainable materials use in the next generation of engineers. Emerging strategies using architecture to enhance toughness often have bioinspired designs, but they largely ignore how architecture affects the development of fracture process zones, especially at small length scales. This is especially true in anisotropic or hierarchical structures, which can have complex fracture processes occurring at multiple length scales. This research will reveal how architecture can inhibit and redistribute material-scale damage when introduced at relevant fracture length scales. Architectures will be made using sustainably sourced materials with features at or below the constituent fracture process zone size using both macro- and nanoscale additive manufacturing. Concomitant simulations will use elastic-plastic-damage finite element modeling to reveal how different structures can spread, deflect, or impede damage to create larger architectural fracture process zones and enhance toughness. These efforts will be incorporated into a new undergraduate outreach initiative on sustainable materials design that aims to recruit underrepresented community college students into university STEM programs. It will also be used in a graduate course on architected material design where students will try to develop new sustainable materials solutions to existing engineering problems.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

可持续经济的材料应几乎不需要能源来生产，可持续采购，并容易回收或重复使用。很少有材料满足这些标准，同时也足够强大，足以在工程上进行广泛使用。为了解决这个问题，可以从天然材料中汲取灵感，通过使用精确的纳米和微观结构，可以从天然材料中恢复和耐用。这项教师的早期职业发展（职业）奖通过对建筑材料中的小规模裂缝的新知识来支持基础研究。生物衍生和/或可生物降解的材料将使用高级制造工具的精确微观结构来创建。小型和大规​​模材料上的机械测试和计算机建模将揭示裂纹如何在复杂的结构中生长和传播。这些知识将用于为航空航天，建筑和汽车行业的新可持续材料的设计提供信息。它将进一步用于开发新的计划和课程，以促进下一代工程师的可持续材料使用。使用体系结构增强韧性的新兴策略通常具有生物启发的设计，但它们在很大程度上忽略了体系结构如何影响断裂过程区域的发展，尤其是在小长度尺度上。在各向异性或分层结构中尤其如此，这些结构可以在多个长度尺度上具有复杂的断裂过程。这项研究将揭示当在相关的断裂长度尺度引入时，建筑如何抑制和重新分布物质尺度损坏。将使用可持续采购的材料制造体系结构，其功能或以下是组成部分裂缝工艺区域大小，使用宏观和纳米级添加剂制造。伴随的模拟将使用弹性损伤有限元建模，以揭示不同结构如何传播，偏转或阻碍损害以创建更大的建筑断裂过程区域并增强韧性。这些努力将被纳入一项新的本科生外展计划，旨在将代表性不足的社区大学生招募到大学STEM课程中。它还将在架构材料设计的研究生课程中使用，学生将尝试为现有工程问题开发新的可持续材料解决方案。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子和更广泛影响的评估审查标准来通过评估来获得支持的。