THE ENVIRONMENT EFFECT ON FATIGUE CRACK GROWTH USING A NEW CHAMBER OF VACUUM

M. de Freitas  F. Romeiro  M. da Fonte      

Anales de la Mecánica de la Fractura, nº 23 . 2006 . Pág. 641 -646
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Resumen: It is known that data obtained on fatigue crack growth is of importance for damage tolerance analysis. The knowledgeof the mechanisms that control fatigue crack growth, such as stress ratio, environment and other parameters have beenwidely studied but are of continue concern to researchers. In this study, special emphasis is given to the study of the environment effect, stress ratio and related effects of crack roughness. For the analysis of the effect of environment, the common chambers of vacuum for the experimental testing are large, expensive and have no quick and easy operation. A new chamber was designed and constructed, to perform fatigue crack growth under several stress ratio conditions for ASTM (MT) specimens made of DIN Ck 45 steel.

LocalizaciónAlbarracín

Departamento de Engenharia Mecânica, Instituto Superior Técnico. Lisboa, Portugal
Escola Superior de Tecnología e Gestão, Instituto Politécnico de Leiria.Leiria, Portugal
Escola Náutica Infante D. Henrique. Paço de Arcos, Portugal