Fatigue properties of AL/AL-MG alloy laminated materials for the applications to railway tank cars. (May 2019)

• Record Type: Journal Article
• Authors: Yang, Guangxue; Li, Shuang; Fu, Delong
• Is Part Of: International journal of fatigue. Volume 122(2019)
• Page Start: 173
• Page End: 183
• Publication Date: 2019-05
• Subjects: 70t tank car -- Al/Al-Mg alloy laminated plate -- Fatigue test -- Fracture characteristics -- Fatigue life; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2019.01.018
• Languages: English
• ISSNs: 0142-1123

Abstract

Highlights: The stress-cycle curve with a survival rate of 97.7% was obtained. The fatigue failure of the laminated plate was determined. The fatigue life of the tank body was calculated based on Miner's linear cumulative damage theory. Abstract: In this study, Al/Al-Mg alloy laminated plates were developed, and such composite materials are applied in a 70 t tank car for transporting concentrated nitric acids. The fatigue tests of the base materials and the lap-welded joint of the Al/Al-Mg alloy laminated plate were conducted, and the stress-cycle (S-N) curve with a survival rate of 97.7% was obtained. The fatigue failure mode was analyzed, and its fracture mechanism of the laminated plates was determined. Furthmore, the mechanical behavior of Al/Al-Mg alloy laminated plate was investigated using the finite element analysis (FEA). Based on the load spectrum of 100 t tank car described in the Association of American Railroads (AAR) standard, in conjunction with the S-N curve of the base materials and the lap-welded joints, the fatigue life of the 70 t tank body was calculated based on the Miner's linear accumulative damage theory. The results showed that the 70 t tank car constructed with such materials can meet the safety requirements of operating for 2.5 million km.