Strength Analysis Of Filament Wound Composite Pressure Vessel With A Metal Liner

Filament-wound composite pressure vessels are usually composed of metal liner and outer winding high-strength fiber-reinforced composite material. Because of the composite pressure vessels' advantages such as light weight, high strength, safety and reliability, they have been widely used in aerospace, military and industrial fields. Expanding the range of composite pressure vessels applications at the same time we should enhance their basic research, especially on the numerical simulation analysis. In the past, we extensively studied of isotropic materials pressure vessels, but the composite material pressure vessels have a fundamentally difference with them -anisotropy. And the structures of them quite complex compared to traditional structures, especially in the head part. The thickness of the head part is changing along its warp direction and the winding angle of any point on it varies.This paper reviews a large number of literature, studies with the structure, manufacturing process and the classical mechanical analysis of carbon fiber wound composite lined by metal. On this basis, according to the actual winding process and in-depth analysis, I put forward that the numbers of fiber bundy passage are the same in each cross-section. Then making use of some softwares such as EXCEL,AUTOCAD,PRO/E, I establish a geometric model combined with the actual vessel. Reasonably assuming that this kind of vesssels are symmetrical in circumferential direction, the filament-wound layer on head part and longitudinal filament-wound layer on Tong Shen are continuous and there is no relative sliding between fiber layers,I have simplified the finite element model. With practical examples, I have calculated the unidirectional fiber-reinforced composite material engineering constants and discussed the finite element issue of anisotropic materials. Then make use of ANSYS software to calculate the example. Finally, we take pressure test and burst test of the actual vessel. The result of finite element analysis that the maximum von-mises stess occurs in central part of the vessel is the same as the burst test. Therefore, burst test proves that model building is reasonable.