Research on Welding Cracks Prevention in the Fuel-Lubricating Oil Heat Exchanger of Aeroengine
Cracks were occurred in welding lines at An Aero engine fuel - oil heat exchanger and oil spills were caused. But shortly, after welding cracks, cracks emerged again and severely threat to flight safety. To improve the overall damping by using new developed shock absorber, and alter the distribution and peak of stress at dangerous parts to prevent cracks by using a prevention program which consisting of two measures: vibration damping and partial damping treatment at the cracks particle which are prone to dangerous parts, were proposed in this paper and for analyze the damping effect, vibration test and compared were used. The results show that the prevention program can effect reduce the peak of stress at the risk of cracks particle which are prone to dangerous parts, and it is certain significant for how to repair and prevent the weld cracks at fuel - oil heat exchanger.
K. Y. Yang et al., "Research on Welding Cracks Prevention in the Fuel-Lubricating Oil Heat Exchanger of Aeroengine", Advanced Materials Research, Vols. 308-310, pp. 1156-1161, 2011