The Consistent Description of Crack Developing Process Based upon Cottrell' Pilling up of Dislocations Model

Abstract:

The new concepts“crack nuclearation toughness”and “crack criterion number”given in this text were used for describing the different crack development steps and crack nuclearation critic condition and the fast developing critic condition of crack were suggested with them by means of Cottrellˊpiling up of dislocations model.The analysis pointed out that crack nuclearation toughness of brittle material is 1/2 of its fracture toughness and the criterion number of crack was a good parameter reflecting anti-crack toughness of material in crack developing process

• Periodical: Advanced Materials Research (Volumes 146-147)
• Pages: 1346-1349
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.146-147.1346
• Online since: October 2010
• Authors: Ai Min Yang
• Keywords: Brittle Material, Crack Nuclearation, Criterion Number, Fracture Toughness

References

[1] Kocanda S, translated by Yan M G, Liu C M, Metal Fatigue and Crack, Shanghai: Shanghai Scientific and Technological Press, 1983: 114.

[2] Xiao J M, Metal Touchness , Shanghai: Shanghai Scientific and Technological Press, 1991；412.

[3] He J R, Metal Fatigue under High Temperature, Beijing: Scientific and Technological Press, 1988: 5.

[4] Knott J F, Fundamentals of Fracture Mechanics, 1973: 455.

[5] Ritchie R O, Met. Trans., 7A, 1976: 831.

[6] Cottrell A H, Trans. AIME, 212 , 1958: 192.

[7] Wu S S, The Transmission Principle in Material Processing, Beijing: Mechanical Industry Press, 2001: 85.

[8] Zhao J S, The Mechanics and Physics of Fracture, Wuchang: Huazhong Scientific and Technological Press, 2002: 101.