An Experimental and Analytical Investigation into the Statistics of Creep Rupture

蠕变断裂统计的实验和分析研究

• 批准号: 8503411
• 负责人: Terry Delph
• 金额: $ 18.69万
• 依托单位: Lehigh University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1985
• 资助国家: 美国
• 起止时间: 1985-12-15 至 1988-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8503411&HistoricalAwards=false
• 关键词: Experimental; Analytical; Investigation; into; Statistics

This research performs experimental and analytical investigations into the statistics of the scatter in time-to-failure data from creep rupture tests. Available experimental data in creep rupture show considerable scatters and variations. Mechanics research, thus far, has not quantified the nature of such scatters or accounted for it in the design of structures. The research consists of two parallel phases. The first phase is an experimental investigation into the statistics of rupture in biocrystals and other simple structures. The second phase is the construction of microstructurally-based analytical models which will allow probablistic predictions of time-to-failure. The results of this research will provide new and fundamental insight into the probablistic aspects of the creep rupture process in simple crystalline structures and will help to lay the foundations to understand the actual nature of the creep rupture of complicated poly-crystalline structures.

本研究对以下内容进行了实验和分析调查 蠕变失效时间数据的分散性统计 破裂试验 现有的蠕变断裂实验数据表明， 相当大的分散和变化。 到目前为止，力学研究， 没有量化这种散射的性质或解释它， 结构的设计。 本研究包括两个平行的 阶段。 第一个阶段是实验性调查， 生物晶体和其他简单结构的断裂统计。 的 第二阶段是构建基于微观结构的分析 允许对失效时间进行概率预测的模型。 这项研究的结果将提供新的和基本的见解 在简单的蠕变断裂过程的概率方面， 晶体结构，将有助于奠定基础， 了解复杂的蠕变断裂的实际性质 多晶结构。