Analysis of Optimal Autofrettage Pressure on CFRP Pressure Vessels Using ANSYS

Abstract:

For the pressure vessels made of high-strength Carbon Fiber Reinforced Plastics (CFRP) and Aluminum liner, the strength is provided by the CFRP, but the liner leak is always the bottleneck of the vessels’ safety. The carrying capacity and anti-fatigue ability of CFRP pressure vessels is largely depend on the elastic deformation range. In this research the principle of autofrettage is analyzed, the mechanical character of a certain 2 liters pressure vessel is analyzed using finite element software ANSYS, and the optimal autofrettage pressure is calculated by optimization method. The results showed that the stresses of the liner under working pressure were decreasing while applying the autofrettage pressure. The liner would gain the best plastic level under the appropriate autofrettage pressure.

• Periodical: Applied Mechanics and Materials (Volume 331)
• Pages: 184-188
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.331.184
• Online since: July 2013
• Authors: Dong Xia Liu, Li Liang, Xing Lei Bao
• Keywords: Autofrettage Pressure, Carbon Fiber Reinforced Polymer/Plastic (CFRP), Finite Element Method (FEM), Optimization

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