FINITE ELEMENT ANALYSIS AND FATIGUE LIFE PREDICTION OF HYBRID FIBER CNG2 CYLINDER

Abstract

Abstract: Promoting gas vehicles is of great significance for haze treatment and use of clean energy. On the base of establishing a carbon/glass hybrid fiber CNG2 gas cylinder finite element model, the stress difference about liner and fiber layer under two conditions, without preloading and preloading, is analyzed. By reading the nominal stress intensity of the dangerous point of the liner cylinder during loading history, the local stress and strain under low cyclic fatigue loading are calculated firstly, and then the fatigue life is calculated by combining Manson-Coffin formula. The calculation results show that blending with carbon fiber can increase the fatigue life of cylinders by 7% in the absence of preloading. Meanwhile, the local stress concentration of the liner is improved. The fatigue life of pre-tightened hybrid fiber cylinders is further increased by 19%.

Key words: carbon/glass hybrid fiber, CNG2 cylinder, preload, fatigue life

CLC Number:

TB332

XIE Zhi-gang, CHEN Xiao-qin, LU Xu-jin, ZHANG Hong-xing. FINITE ELEMENT ANALYSIS AND FATIGUE LIFE PREDICTION OF HYBRID FIBER CNG2 CYLINDER[J]. Fiber Reinforced Plastics/Composites, 2019, 0(2): 75-78.

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