复合材料螺栓干涉连接结构压钉过程轴向力建模
An Analytical Model for Predicting Axial Force on Bolt Insertion Process of Composite Interference-fit Joint

复合材料干涉连接结构在螺栓压入过程中，由于螺栓杆与连接孔孔壁间存在显著的轴向相互作用，有可能在复材孔周引起分层损伤，更准确的控制轴向力对于提升复材干涉连接结构强度具有重要的意义。根据干涉配合螺栓压入过程中接触关系的变化，对压钉过程进行了阶段划分，并在经典层合板理论假设基础上，结合弹性力学复变函数方法，以干涉量为变量建立了螺接过程轴向力解析模型。基于ABAQUS软件，建立了干涉压入压钉过程的仿真模型，验证了解析模型的正确性。
Axial force, which induced by the interference-fit on the close contact interface between bolt and hole, is the crucial element to dominate the delamination of composite plate during the bolt insertion process. A model for predicting the axial force on the bolt insertion process of composite interference-fit joint is presented. According to the variation in contact field between bolt and hole, the insertion process has been divided into different stages and the mechanical behaviors have been analyzed. Based on the classical laminated plate theory and elastic mechanics method of complex variable function, the model for axial force during installing had been established. A 3D FEA simulation of bolt inserting process with interference-fit is conducted to verify the present model. The good correlation is observed between the FEA and the model in various interference-fit