• CN:11-2187/TH
  • ISSN:0577-6686

›› 1994, Vol. 30 ›› Issue (3): 99-104.

• 论文 • 上一篇    下一篇

工程材料低温服役安全性定量估算的临界温度-环境温度可靠性模型

冯祖德;涂铭旌;鄢文彬   

  1. 厦门大学;成都科技大学;西南交通大学
  • 发布日期:1994-05-01

CRITICAL TEMPERATURE-ENVIRONMENTAL TEMPERATURE RELIABILITY MODEL FOR ESTIMATING THE SECURITY OF ENGINEERING MATERIALS UNDER LOW TEMPERATURE

Feng Zude;Tu Mingjun;Yan Wenbin   

  1. Xiamen University Chengdu University of Science and Technology Southwest Jiaotong University
  • Published:1994-05-01

摘要: 微观不均匀性引起材料宏观韧性的分散性,本文提出:由试验所得的韧性-温度关系曲线上,相应某指定韧性值的临界温度是一个随机变量。由此提出了临界温度-环境温度可靠性模型,并利用集合论的方法推导出临界温度分布函数的解析关系式。最后结合几种工程材料进行了分析与讨论。

关键词: 环境温度, 可靠性, 临界温度, 韧性

Abstract: In the light of the statistical distribution of toughness resulting from the microstructural inhomogeneity of materials, a critical temperature-environmental temperature reliability model is established on the conclusion that the critical temperature corresponding to any assigned toughness value at the toughness-temperature curve obtained by testing is a random variable. The relationship between critical temperature distribution function and toughness distribution function is deduced by the mean of set theory. Analysis and discussion are also carried out for several materials to show application of the model.

Key words: Critical temperature, Environmental temperature, Reliableness, Toughness