Research On Meso Structures And Damage Of3D Woven Composite

3D woven composites developed in the1980s to meet the demand for high-performancecomposites in the aerospace field are advanced structural materials which can effectivelyovercome the weaknesses that traditional classic layer plywood composite materials aredifficult to overcome.3D woven composites’ stiffness, strength, impact toughness, damagetolerance and fatigue resistance are all excellent; the design of its structure can be varied andthe net shape forming of specific-shape workpiece can be achieved. So3D woven compositematerials are widely used in many fields, especially in the aerospace and ship domain.In this paper, the rotator boss3D woven composites have been studied in detail as arepresentative of3D woven composites. The unit-division methods are proposed, and themeso geometric model and the finite element model of the unit are established. Its mechanicalproperties are predicted according to its geometry and material properties, then its finiteelement simulation is carried out and the results were analyzed. The main contents of thispaper are as follows:Firstly, the geometry model of the boss unit-body from the fiber blank material was built.Secondly, the simulation of the smallest boss unit-body was carried out using the finiteelement software.Thirdly, in the selection of parameters when the corresponding load is applied to the unit,the appropriate parameters should be selected to ensure the correctness of the simulation, andto provide a basis for further study.Finally, the whole process of the destruction of the material was analyzed, the form of thedestruction of the material was simulated and the changes of the stress and strain in the courseof its destruction was studied.