Fracto-Emission from Ceramics

陶瓷的碎裂发射

• 批准号: 8912179
• 负责人: J. Thomas Dickinson
• 金额: --
• 依托单位: Washington State University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-03-15 至 1993-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8912179&HistoricalAwards=false
• 关键词: Fracto; Emission; Ceramics

The goal of this research is to understand emission of particles and photons before, during, and following the propagation of crack in a solid. This technique, fracto- emission, is a novel and innovative technique to study the crack formation, failure mechanisms, and crack propagation. The fast time response of photon and particle emission allows probing of fracture events over extremely short time intervals ( 10 ns). Atomic level events (fracto-emission) during brittle fracture will be related with the concepts of energy dissipation (with spatial and temporal resolution). The dynamics of catastrophic crack growth in brittle and semi-brittle materials will be analyzed. Glass, ceramic, and metal-ceramic composites will be studied.

这项研究的目的是了解固体中裂纹扩展之前、期间和之后的粒子和光子的发射。该技术是研究裂纹形成、破坏机制和裂纹扩展的一种新颖的创新技术。光子和粒子发射的快速时间响应允许在极短的时间间隔(10 Ns)内探测断裂事件。脆性断裂过程中的原子级事件(破裂发射)将与能量耗散(具有空间和时间分辨率)的概念相关联。将分析脆性和半脆性材料中灾难性裂纹扩展的动力学。将学习玻璃、陶瓷和金属-陶瓷复合材料。