The Numerical Simulation And Experimental Study Of The Tensile And Compressive Properties Of Self-lubricating Bearings Fabric Liner

Aviation self-lubricating spherical plain bearings are the key component of aeronauticequipment, and the fabric self-lubricating liner is one of the key components of theself-lubricating spherical plain bearings, which makes its reliability directly influence theservice life of the bearings, even the safety of the aeronautic equipments. Studying themechanical and tribological properties of the fabric self-lubricating liner needs lot ofexperiments which are time and resource consuming things. However, as the developmentof the finite element techniques, developing the finite element model of the fabric liner toanalyze the mechanical and tribological properties of the fabric liner is of great practicalsignificance.This article studied the self-lubricating bearings fabric liner. The fabric liner finiteelement model was created using the large scale general finite element analysis softwareANSYS. Based on the micromechanics and periodic boundary conditions, the tensile andcompression properties of the fabric liner were investigated. Furthermore,strength criterion that suitable for the two-dimension broken twill fabric liner was selectedreferencing several different composites criterions to lay the foundation for further studyof the friction and wear properties of the fabric liner.The sectional morphologies and the buckling shapes of the fiber of the broken twillfabric liner were obtained by section technology. Based on the elliptical cross sectionmodel of the fabric developed by the simulation software MATLAB, geometric model portbetween MATLAB and APDL which could quickly create parameterized model in ANSYSwas established. This laid the foundation for the development of the hierarchical frictionmodel analysis.Based on the microscopic theory of composite materials and the periodic boundaryconditions of the single-cell model, the tensile and compression elastic constants ofPTFE/Kevlar liner mixed broken twill were predicted successfully using the ANSYS finiteelement software. After compared with the experimental results, it showed that the error iswithin the allowable range, which proved the correctness of finite element model. The most suitable strength calculation criteria for the two-dimensional wovenself-lubricating liner was obtained by contrast calculation among plenty of compositestrength criterias, which laid the foundation for the future research of the finite elementsimulation on the tribological performances of the fabric self-lubricating liner.