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具有伪弹性合金内衬的纤维缠绕复合材料压力容器的承载能力很大程度上取决于内衬的伪弹性特性,合理地设计合金的伪弹性范围,可使容器具有最佳的承载能力。根据伪弹性合金的相变理论和复合材料弹性力学,并结合强度理论,给出了具有伪弹性合金内衬的复合材料压力容器的强度分析方法以及承载能力的确定方法。研究结果表明:伪弹性合金内衬改变了复合材料压力容器的受力状态,将铝合金的内衬主宰变成了外壳主宰,使复合材料的功能可以得到更充分地发挥;同时可以确保内衬工作在线弹性范围内,卸载时也不会发生受压屈曲现象。所以,具有伪弹性合金内衬的复合材料压力容器能够增加极限承载能力,延长内衬的工作寿命。
The load-bearing capacity of the fiber-wound composite pressure vessel with pseudo-elastic alloy lining depends largely on the pseudo-elastic properties of the lining. Reasonable design of the pseudo-elastic range of the alloy allows the container to have the best carrying capacity. According to the theory of phase transition of pseudo-elastic alloy and composite elastic mechanics, combined with the strength theory, the strength analysis method of composite pressure vessel with pseudo-elastic alloy lining and the determination method of bearing capacity are given. The results show that the pseudo-elastic alloy lining changes the stress state of the composite pressure vessel, and the inner lining of the aluminum alloy becomes the dominant shell, so that the function of the composite material can be fully exerted; at the same time, the liner Flexibility within the scope of the work, when unloading buckling will not occur under pressure. Therefore, the composite pressure vessel with a pseudo-elastic alloy liner can increase the ultimate bearing capacity and extend the working life of the liner.