PERFORMANCE STUDY AND FINITE ELEMENT ANALYSIS OF AUTOFRETTAGE PRESSURE OF THIN-WALLED METAL-LINED COMPOSITE GAS CYLINDERS

Abstract

Abstract: The effect of autofrettage pressure on the performance of thin-walled metal lined composite cylinders was studied. The finite element method was used to simulate the autofrettage process of the cylinder, and the composite cylinders were wound to verify the hydraulic fatigue and blasting test. Besides, the acoustic emission monitoring was introduced into the test process. The experimental and analytical results show that the autofrettage pressure had great influence on the fatigue and blasting performance of thin-walled metal lined composite cylinders. The excessive autofrettage pressure would lead to resin cracking and fiber breakage in the composite layer of gas cylinder, which would reduce the burst pressure strength of composite gas cylinder. The fatigue test results show that excessive autofrettage pressure could easily lead to the lining to enter the yield state ahead of time and reduce the fatigue life. For thin-walled metal lined composite cylinders, the selection of autofrettage pressure should fully consider the stress of metal lined cylinders in autofrettage and working process, so as to make them in a reasonable range.

Key words: autofrettage pressure, composite pressure vessel, acoustic emission, finite element analysis

CLC Number:

TB332

LIN Song, JIA Zi-xuan, LI Wen-bin, LI Shuang-wen. PERFORMANCE STUDY AND FINITE ELEMENT ANALYSIS OF AUTOFRETTAGE PRESSURE OF THIN-WALLED METAL-LINED COMPOSITE GAS CYLINDERS[J]. Fiber Reinforced Plastics/Composites, 2020, 0(1): 21-26.

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