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Metal Fatigue Part 4

Tham khảo tài liệu 'metal fatigue part 4', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 74 Chapter 5 54. M.F. Garwood H.H. Zurburg and M.A. Erickson Correlation of Laboratory Tests and Service Performance Interpretation of Tests and Correlation with Service ASM 1951 pp. 1-77. 55. H. Nisitani and K. Kawano Correlation between the Fatigue Limit of a Material with Defects and Its Non-Propagating Crack Some Considerations Based on the Bending or Torsional Fatigue of the Specimen with a Diametrical Hole Trans. Jpn. Soc. Meeh. Eng. Ser. I 37 300 1971 1492-1496. 56. Y. Murakami and M. Endo The yjarea Parameter Model for Small Defects and Nonmetallic Inclusions in Fatigue Strength Experimental Evidence and Applications Theoretical Concepts and Numerical Analysis of Fatigue Eds. A.F. Blom and C.J. Beevers EMAS Ltd. West Midlands 1992 pp. 51-71. 57. Y. Murakami and M. Endo Effects of Defects Inclusions and Inhomogeneities on Fatigue Strength Int. J. Fatigue 16 3 1994 163-182. 58. Y. Murakami and T. Toriyama Application of the -Jarea Parameter Model to Fatigue Strength Evaluation of Steels Containing Various Artificial Defects Holes Cracks and Complex Defects Proc. 21th Fatigue Symp. Soc. Mater. Sci. Jpn. 1992 pp. 127-130. 75 Chapter 6 Effects of Nonmetallic Inclusions on Fatigue strength The influence of small defects and notches has been investigated over a long period. There are numerous factors which have been assumed to influence the fatigue strength. Existing conclusions each derived from a limited number of experiments are contradictory. Thus no reliable quantitative method has been established for evaluation of the effects of nonmetallic inclusions. However recent advances in the application of fracture mechanics to small crack problems 1 has given US the key to a solution of this complicated problem. The solution to the relationship between small defects and small cracks may be thought of as an example of a fracture mechanics application 2-4 . From a historical perspective the problems of nonmetallic inclusions are not new when compared with those of .