CMMI-EPSRC: Damage Tolerant 3D Micro-Architectured Brittle Materials

CMMI-EPSRC：耐损伤 3D 微架构脆性材料

• 批准号: 2317252
• 负责人: Ankit Srivastava
• 金额: $ 50万
• 依托单位: Texas A&M Engineering Experiment Station
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2026-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2317252&HistoricalAwards=false
• 关键词: CMMI; EPSRC; Damage; Tolerant; 3D; CMMI; EPSRC; Damage; Tolerant; 3D

The search for lightweight materials that can withstand extreme service conditions has been one of the major driving forces in material development in recent decades. Ceramic materials are often the preferred choice for such conditions due to their stability at high temperatures and in harsh environments. However, their inherent brittleness and low damage tolerance compared to metallic materials limit their structural applications. An emerging class of materials known as micro-architectured materials holds great potential for overcoming these limitations. Therefore, the overarching goal of this US-UK collaborative project is to develop a deeper understanding of fracture and damage tolerance in a wide variety of micro-architectured materials made from purely brittle parent materials which are ceramic/ceramic-like. These materials not only have potential structural applications but are also sought after for other contemporary technologies such as energy, biomedical devices, and micromechanical devices. This project will facilitate damage tolerance and structural integrity analysis for the reliable use of micro-architectured materials in these technologies. The project’s education and outreach plans are also closely integrated with the research plan, with a shared focus on the mechanics of micro-architectured materials. This includes developing interactive and open-access instructional materials on the subject, providing training to graduate students and postdoctoral researchers, and increasing awareness of mechanics and micro-architectured materials through museum exhibits aimed at K-12 students. Furthermore, this bi-national collaborative project will contribute to the development of a diverse and globally engaged technical workforce in both experimental and computational mechanics and materials science.The specific objectives of this project are twofold. Firstly, to determine the mechanisms of crack growth and damage tolerance in large-scale 3D periodic micro-architectures composed of linear elastic brittle parent materials. Secondly, to extend the understanding of fracture mechanisms to stochastic micro-architectures made of brittle ceramic parent materials. This project will go beyond the traditional understanding of classical fracture mechanics and associated testing protocols by developing a comprehensive understanding of damage tolerance and devising a novel methodology to characterize the fracture response of a wide variety of 3D micro-architectured materials made from purely brittle materials. Furthermore, by achieving these objectives, the project aims to test hypotheses, address fundamental questions with technological relevance, and develop structure-property-performance maps that will facilitate goal-oriented design and selection of optimal micro-architectures.This research is a collaborative effort under the NSF Directorate for Engineering - UKRI Engineering and Physical Sciences Research Council Lead Agency Opportunity (ENG-EPSRC), NSF 20-510.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.

近几十年来，寻找可以承受极端服务条件的轻质材料一直是材料开发的主要驱动力之一。陶瓷材料通常是此类条件的首选选择，因为它们在高温和HARMSH环境中的稳定性。但是，与金属材料相比，它们固有的脆性和低损伤耐受性限制了其结构应用。一种称为微构造材料的新兴材料具有克服这些局限性的巨大潜力。因此，这个US-UK协作项目的总体目标是在各种纯属纯属性材料制成的多种微构造材料中，对裂缝和损伤的耐受性有更深入的了解，这些材料纯属陶瓷/类似陶瓷的材料。这些材料不仅具有潜在的结构应用，而且还针对其他当代技术（例如能源，生物医学设备和微机械设备）造成伤痕累累。该项目将支持损害耐受性和结构完整性分析，以在这些技术中可靠地使用微构造材料。该项目的教育和外展计划也与研究计划密切相结合，共同关注微构造材料的机制。这包括开发有关该主题的互动和开放式教学材料，为研究生和博士后研究人员提供培训，以及通过博物馆展览提高对机械师和微观构造材料的认识，旨在针对K-12学生。此外，这个双国协作项目将有助于发展多样性和全球参与的技术劳动力，并在实验力学和材料科学中。该项目的具体目标是双重的。首先，确定由线性弹性脆性母体材料组成的大规模3D周期性微体系结构的裂纹生长和损伤耐受性的机制。其次，将对断裂机制的理解扩展到由脆性陶瓷材料制成的随机微体系结构。该项目将通过对损害耐受性的全面理解并设计一种新颖的方法来表征各种纯粹脆性材料制成的各种3D微构造材料的裂缝反应，从而超越对经典断裂力学和相关测试方案的传统理解。 Furthermore, by achieving these objectives, the project aims to test hypotheses, address fundamental questions with technical relevance, and developing structure-property-performance maps that will facilitate goal-oriented design and selection of optimal micro-architectures.This research is a collaborative effort under the NSF Directorate for Engineering - UKRI Engineering and Physical Sciences Research Council Lead Agency Opportunity (ENG-EPSRC), NSF 20-510.该奖项反映了NSF的法定任务，并通过使用基金会的知识分子优点和更广泛的影响审查标准评估来诚实地获得支持。