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

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.

寻找能够承受极端使用条件的轻质材料是近几十年来材料发展的主要驱动力之一。陶瓷材料由于其在高温和恶劣环境下的稳定性而通常是这种条件的优选选择。然而，与金属材料相比，它们固有的脆性和低损伤容限限制了它们的结构应用。被称为微结构材料的新兴材料类别具有克服这些限制的巨大潜力。因此，这个美国-英国合作项目的总体目标是开发一个更深入的理解断裂和损伤容限在各种各样的微结构材料制成的纯脆性母体材料是陶瓷/陶瓷类。这些材料不仅具有潜在的结构应用，而且还被用于其他当代技术，如能源，生物医学设备和微机械设备。该项目将促进损伤容限和结构完整性分析，以便在这些技术中可靠地使用微结构材料。该项目的教育和外展计划也与研究计划紧密结合，共同关注微结构材料的力学。这包括开发关于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，并通过针对K-12学生的博物馆展览提高对力学和微结构材料的认识。此外，这一两国合作项目将有助于在实验和计算力学以及材料科学领域发展多样化和全球参与的技术队伍。该项目的具体目标是双重的。首先，确定由线弹性脆性母体材料组成的大尺度三维周期微结构中裂纹扩展和损伤容限的机制。其次，将断裂机制的理解扩展到由脆性陶瓷母体材料制成的随机微结构。该项目将超越传统的理解经典断裂力学和相关的测试协议，通过开发一个全面的理解损伤容限和设计一种新的方法来表征各种各样的3D微结构材料的纯脆性材料的断裂响应。此外，通过实现这些目标，该项目旨在测试假设，解决与技术相关的基本问题，并开发结构-性质-性能图，以促进面向目标的设计和选择最佳的微架构。（ENG-EPSRC），NSF 20- 510。该奖项反映了NSF的法定使命，并被认为是值得通过使用基金会的知识价值和更广泛的影响审查标准进行评估的支持。