复合材料压力容器封头连接的建模及失效分析

Modeling and Failure Analysis of Head Connection of Composite Material Pressure Vessel of Aerocraft

为验证某航空飞行器复合材料压力容器封头连接形式与结构的合理性,采用有限元分析方法研究复合材料封头连接的失效机理。通过对不同内压作用下的压力容器封头连接应变变化进行比较分析,发现螺栓强度、材料强度、螺栓宽径比等因素均会影响压力容器封头连接的失效破坏,这为复合材料压力容器封头连接结构的设计提供了理论依据。

To verify the rationality of the head structure of composite pressure vessel of an aircraft, the finite element analysis method is applied to study the failure mechanism of composite head structure. Through comparative analysis of the strain changes of the pressure vessel head connection under different internal pressures, it is found that the bolt strength, material strength, bolt width-to-diameter ratio and other factors will affect the failure of the pressure vessel head connection, which provides a theoretical basis for the design of the connection structure of the composite pressure vessel head.