Effects of Nanostructure on Dynamic Fracture Mechanisms

纳米结构对动态断裂机制的影响

• 批准号: 1645923
• 金额: --
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1645923
• 关键词: Effects; Nanostructure; Dynamic; Fracture; Mechanisms

Dynamic fracture is an important physical process that underpins the use of materials in many real-world applications (i.e. crack propagation and failure, before information is communicated through the complete system). However, the effect of material nanostructure (both lattice and grain structure) on such events is not well understood; for example how inter-grain boundary strength and lattice anisotropy influence crack propagation and growth under tension.The aim of this project is to identify and study correlations between material microstructure and dynamic fracture response at high strain rates. In particular, it will likely include comparing polycrystalline metals with amorphous glasses. The project will involve careful experiments using a recently developed high-rate loading technique, supported by a range of diagnostic instrumentation (although we expect to develop a range of similar, complimentary tests at lower rates). The project is part of a longstanding industrial collaboration, and will be performed in close co-operation with related numerical modelling efforts.

动态断裂是一个重要的物理过程，它支持材料在许多实际应用中的使用（即裂纹扩展和故障，在信息通过整个系统传递之前）。然而，材料的纳米结构（晶格和晶粒结构）对这些事件的影响还没有得到很好的理解;例如，晶界强度和晶格各向异性如何影响拉伸下的裂纹扩展和增长。本项目的目的是识别和研究材料微观结构和高应变率下动态断裂响应之间的相关性。特别是，它可能包括比较多晶金属与非晶玻璃。该项目将涉及使用最近开发的高速率加载技术进行仔细的实验，并由一系列诊断仪器提供支持（尽管我们希望开发一系列类似的低速率免费测试）。该项目是长期工业合作的一部分，将与相关的数值模拟工作密切合作。

项目成果

Dynamic Behavior of Materials, Volume 1. Conference Proceedings of the Society for Experimental Mechanics Series

材料的动态行为，第 1 卷。实验力学学会会议论文集系列

• 发表时间: 2018
• 作者: WARD S

The dynamic ductile fracture of high purity copper

高纯铜的动态延性断裂

• 发表时间: 2017
• 作者: WARD S

The Effects of Nanostructure upon the Dynamic Ductile Fracture of High Purity Copper

• DOI: 10.1016/j.proeng.2017.08.078
• 发表时间: 2017
• 期刊: Procedia Engineering
• 作者: Sarah Ward;C. Braithwaite;A. Jardine

The effects of microstructure and nanostructure upon dynamic ductile fracture

微观结构和纳米结构对动态韧性断裂的影响

• DOI: 10.17863/cam.90275
• 发表时间: 2020
• 作者: Ward S