关键词：材料 纹扩展 数关系 合性参数C和n 程序
Abstract
This design is mainly researches and analysises the parameters function method of the crack-growth. According to Paris formula derivates and analysis the parameters of C(relate with the chemical composition of materials, organization and a payload of frequency, the cycle of asymmetry and other factors) and n of mathematical expression, then preparates the expression of the procedures.Useing the expression analysis of metal materials parameters of 40-50 of C and the specific data n. So that research by the expression is correct by verificating experiment data. In fact, the relationship between the C and n is not random, they can be seen as the correction only under certain conditions of the various factors. And put out the establishment of Paris formula to crack propagation material parameters C of the new concepts and definitions.
Key words: Materials； Cack growth； Function； Integrating parameters c and n； Pocedures
目 录
中文摘要 i
英文摘要 ii
目录 iii
第一章 绪论 1
1.1 课题背景.1
1.2 疲裂研究回顾 .3
1.3 疲劳损伤形式 .4
1.4 疲劳损伤研究中存在的问题 ....5
第二章 裂纹扩展参数函数关系的建立 ....7
2.1 疲劳损伤裂纹扩展的分析 .7
2.2 综合性参数C与指数n关系式的建立9
2.3 结论 14
第三章 算程序的编制 15
3.1 编程工具软件简介 15
3.2 编写计算式程序 16
第四章 计算结果的验证 20
4.1 计算结果与实验数据的对比....20
4.2 误差分析与结论 24
第五章 总结与展望25
5.1 论文总结 25
5.2 对今后工作的展望 26
参考文献 27
致谢 ....28
