Experimental and theoretical study on numerical density evolution of short fatigue cracks


Autoria(s): 方飙; 洪友士; 白以龙
Data(s)

1995

Resumo

Fatigue testing was performed using a kind of triangular shaped specimen to obtain the characteristics of numerical density evolution for short cracks at the primary stage of fatigue damage. The material concerned is a structural alloy steel. The experimental results show that the numerical density of short cracks reaches the maximum value when crack length is slightly less than the average grain diameter, indicating grain boundary is the main barrier for short crack extension. Based on the experimental observations and related theory, the expressions for growth velocity and nucleation rate of short cracks have been proposed. With the solution to phase space conservation equation, the theoretical results of numerical density evolution for short cracks were obtained, which were in agreement with our experimental measurements.

Identificador

http://dspace.imech.ac.cn/handle/311007/39224

http://www.irgrid.ac.cn/handle/1471x/4958

Idioma(s)

英语

Fonte

Acta Mechanica Sinica.1995,11(2):144-152

Palavras-Chave #Short Fatigue Cracks #Crack Numerical Density #Fatigue Damage Evolution
Tipo

期刊论文