Research On Buckling And Penetration Behavior Of Composite Laminated Plate

In many advanced engineering applications, such as automotive, aviation industries, shipbuilding and construction industry, fiber reinforced composites have been extensively used due to their high-specific strength and stiffness, good fatigue life and energy absorption properties. The study of buckling and damage resistance has attracted much attention of researcher; earlier researches mainly focus on the quasi-static penetration and low speed impact. The dynamic impact response of composites is one of the hot topics when more and more researchers study its special mechanical properties and supernormal impact resistance. In present paper, several aspects are investigated in the following:1. The present researches on buckling and penetration of composite laminates are simply generalized, and the main methods and conclusions are summarized.2. Considering the stress wave and boundary conditions, the motion equations were derived form the principle of Hamilton. The laminate’s analytic solution of static buckling and dynamic buckling under axial load were calculated based on variables separation, static and dynamic critical buckling load are obtained, and the dynamic critical load is about2.5times of the static one.3. Using ABAQUS, the dynamic buckling of composite laminates subjected to step load are simulated. The time-history curves for midpoint of loaded edges and the dynamic critical load are obtained. They are in good agreement with the theoretical analysis. The results of simulation indicate that the dynamic buckling of composite laminates are affected by boundary conditions、layers、 impact load、ply angle.4. The complete penetration is modeled using ABAQUS/Explicit, studying the effects of perforators nose shapes、fiber angles and layer numbers in penetration. The simulation shows fairly good consistency with experiment result and theoretical result. Further, illustrated that the use of ABAQUS software to provide a useful reference and guidance for the practical engineering application.5. Oblique penetration of three nose shapes without friction is simulated, discussing the effects of shapes、impact angles on the response of damage resistance, and comparing the results with penetration.