Random Fatigue Crack Growth Rates of China Railway Grade B Cast Steel Wheel

Autor: Bing Yang, Guo Xiang Song, Yong Xiang Zhao
Rok vydání: 2011
Předmět:
Zdroj: Key Engineering Materials. :387-392
ISSN: 1662-9795
DOI: 10.4028/www.scientific.net/kem.480-481.387
Popis: Fracture surface observations and statistical deriving are applied for the present investigation on the random fatigue crack growth rates of China grade B cast steel wheel. Results reveal that: the crack grows with relative regular initial tip companied fabric like stripes along the growth direction but few of fatigue striations, and then, cleavage flowers appearing on the district of transient fracture with few of dimples. It indicates that sharp notched structural crack behaviour acts as a few of plastic dissipation process. Non-linear statistical modeling covering entire three pieces of fatigue crack growth is constructed for describing the random crack growth rates. Scattered randomness of the growth rates has been well characterized.
Databáze: OpenAIRE