Comparative Study on Vibration Fatigue Characteristics of Fuel Tank Material in Fuel and Air Media

Abstract

To quantify the influence of the fuel medium on the fatigue performance of fuel tank materials, a comparative study was performed on the vibration fatigue characteristics of parent material specimens in fuel and air media. A fluid–solid coupling model was established based on the virtual mass method. Meanwhile, vibration fatigue tests of Q235BF specimens were performed in fuel and air media. The quantitative relation of the fatigue life of specimens in the air medium and that in the fuel medium was obtained. Fracture observation and energy spectrum analysis revealed the influence law of fuel on notches of specimens. The modal analysis of the finite element model proves that the stress of the specimens in the fuel medium is larger than that in the air medium. In this condition, they have shorter life. Finally, four approaches were used to calculate the fatigue life of the specimens to compare with the test life. The reasonable fatigue life prediction method was obtained in the case of fuel and air media.

Investigation of structural parameters influencing vibration characteristics of heavy-duty truck diesel tanks

“…The driving process of heavy duty trucks is accompanied by various complex conditions, such as acceleration, deceleration, and turning, which give rise to the internal problems of the diesel tank, including fluid sloshing and intricate vibration. These problems can lead to faults such as weld seam tearing and baffle plate detachment, and even fragments of aluminum-magnesium alloy materials can follow the oil into the engine, posing a threat to the safety of the engine and the entire vehicle [ 1 , 2 ].…”

“…The above research involves the results of finite element analysis [ 12 ], computational fluid dynamics [ 13 , 14 ], fluid-structure interaction [ 15 , 16 ], and vibration [ 17 , 18 ], etc., which provides a new method for the design of tanks like diesel tanks, reduces development costs, and improves product quality [ 3 ]. However, there are still deficiencies in the research on the sloshing problem of diesel truck tanks, and the influence of fill ratio and baffle plate on the vibration characteristics of diesel tanks is not considered comprehensively.…”