關鍵詞:材料 紋擴展 數關系 合性參數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 錄
中文摘要 i
英文摘要 ii
目錄 iii
第一章 緒論 1
1.1 課題背景.1
1.2 疲裂研究回顧 .3
1.3 疲勞損傷形式 .4
1.4 疲勞損傷研究中存在的問題 ....5
第二章 裂紋擴展參數函數關系的建立 ....7
2.1 疲勞損傷裂紋擴展的分析 .7
2.2 綜合性參數C與指數n關系式的建立9
2.3 結論 14
第三章 算程序的編制 15
3.1 編程工具軟件簡介 15
3.2 編寫計算式程序 16
第四章 計算結果的驗證 20
4.1 計算結果與實驗數據的對比....20
4.2 誤差分析與結論 24
第五章 總結與展望25
5.1 論文總結 25
5.2 對今后工作的展望 26
參考文獻 27
致謝 ....28