BİRİKİMLİ HASAR TEORİLERİ VE YORULMA ÇATLAĞINA GÖRE ÖMÜR DEĞERLENDİRMELERİ

• Main Authors: Gökhan Erkin Saatçı, Necati Tahralı
• Format: Article
• Language: English
• Published: Hezarfen Aeronautics and Space Technologies Institue 2003-07-01
• Series: Havacılık ve Uzay Teknolojileri Dergisi
• Subjects: Fatigue; life; cumulative damage; crack growth
• Online Access: http://www.jast.hho.edu.tr/JAST/index.php/JAST/article/view/71/65

As known before, obtaining Woehler diagrams of the materials are very difficult. But to predict the service life of machine elements that are subject to cyclic loads, the cumulative damage theories are needed, and to use the teories maximum life values at the stresses that the specimen is loaded must known. These values are being read from Woehler diagrams. In this study, it is aimed to calculate the equivalent fatigue life, independent from Woehler diagrams. Therefore life values that are needed for cumulative failure theories, are obtained from an emprical expression that is related to fatigue crack growth rate. First of all, this emprical expression is described and then it is used to calculate the equivalent life of the transmission component of “GTD model 4X4 military vehicle” that is being produced in “1013. Ord. Ana. Tam. Fabrikası” which is working under several variable stresses.