Abstract
In order to solve the yielding failure problem of water jet energy accumulator barrel due to high pressure, the prestressed composite structure design and the theory of equal strength are used to determine the parameters of accumulator barrel, such as the internal cylinder of the composite cylinder, the radii of the inner and outer cylinders, the radius of sub-layer and the optimal interference. Then the ANSYS software is used to analyze the cylinder model with the finite element method, the equivalent stress of the effective node along the wall thickness of the simulation model is obtained by path extraction method and the distribution curves of the equivalent stress along the wall thickness with different internal pressure are also obtained. By analyzing the simulated results and curves, the design parameters of accumulator barrel meet the expected strength requirement.
Highlights
Water jet cutting is a kind of non-conventional machining method, which uses high speed and high kinetic energy fluid medium to working.The cutting process belongs to cold cutting, which does not affect the material structure, and has no phenomenon of mechanical stress deformation and warpage
In order to improve the actual strength of the barrel, in this paper, accumulator in the use of the process often due to high pressure and yield failure problem, the design of prestressed composite structure of accumulator cylinder, and make use of finite element method to valify, in order to improve the bearing capacity of the accumulator
The model is symmetric and can be simplified to the two-dimensional 1 /4 model.According to the foregoing to establish model,the selection can be approximated by simulation with elastoplastic properties,two dimensional plane element of large deformation and large strain cylinder materials PLANE183,and Setting material mechanical parameters,the bilinear kinematic hardening model (BKIN) is adopted to simulate the material nonlinearity at the same time[5]
Summary
Water jet cutting is a kind of non-conventional machining method, which uses high speed and high kinetic energy fluid medium to working.The cutting process belongs to cold cutting, which does not affect the material structure, and has no phenomenon of mechanical stress deformation and warpage. Accumulator is an important auxiliary component of high pressure water in water jet cutting. It can save pressure, absorb shock and eliminate pulsation. In order to improve the actual strength of the barrel, in this paper, accumulator in the use of the process often due to high pressure and yield failure problem, the design of prestressed composite structure of accumulator cylinder, and make use of finite element method to valify, in order to improve the bearing capacity of the accumulator
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