Failure Analysis on Cracking of High Pressure Hose Body for A Commercial Vehicle

Lu Shanshan, Qiao Xiaobing, Zhang Yanbiao, Zhang He, Mei Huifeng, Zhao Zhensheng（Commercial Vehicle Development Institute, FAW Jiefang Automobile Co., Ltd., Changchun 130000）

Abstract：in order to determine the burst cause of the high- pressure hose body of a commercial vehicle, the high-pressure hose is analyzed from the aspects of manufacturing process, installation form and performance analysis. The results show that the materials used in the high-pressure hose meet the technical requirements, the manufacturing process has no quality problems, and the burst of the hose body is caused by the installation deformation. After the high-pressure hose is installed, due to the combined effects of distortion, bending, vibration and pulse pressure, the braiding angle of the braid changes greatly, the pressure bearing performance of the hose will be reduced, and finally the hose body will burst and fail.

Key words: High pressure hose, Burst failure, Commercial vehicle