Numerical Study On Buckling Of Composite Plates Under The Impact On Rigid Mass

With the development of science and technology,composite materials have broad application prospects in many fields such as aerospace,mechanical engineering and nuclear engineering.Plates are widely used as the most common basic components in these fields.The results of composite plates under different loads,different material properties,and different research methods are different.This paper numerical study on buckling of composite plates under the impact of rigid mass.This paper works as follows:1.Briefly describe the research status and research methods of elastic dynamic buckling and elastoplastic dynamic buckling of plates at home and abroad.2.Based on the Reissner first-order shear plate theory,considering the stress wave effect,taking into account the effects of axial inertia and moment of inertia,Dynamic buckling control equations,initial conditions and continuity conditions of composite plate are obtained by Hamilton principle.3.The dynamic buckling control equation,boundary conditions,initial conditions and continuity conditions of composite plates are dimensionless.The finite difference method is used to solve the equations,and the differential equation of the dynamic buckling governing equation of composite plates is obtained.4.Using MATLAB programming,substituting model parameters and material parameters,and calculating the differential equation of control equations,the waveforms of dynamic buckling of rigid mass impact composite plates under different boundary conditions are obtained.The impact velocity and critical length under different boundary conditions are analyzed and discussed.The effects of impact quality,layup angle and other factors on elastic buckling and elastoplastic buckling of composite plates.The results show that with the increase of impact velocity,critical length and impact mass,the higher-order modes of buckling are excited,and the peak value of the corresponding waveform is grad ually increased.The first half of the buckling increases with the increase of impact velocity,impact quality and layup angle.The decrease of wavelength indicates that the impact velocity,stress wave effect and axial inertia have an effect on the elastic dynamic buckling of the composite plate.The buckling of the clamped boundary conditions waveform is different from that the simple boundary conditions,The peak value of the clamped boundary conditions buckling wave is lower,which indicates that the boundary condition has an effect on the elastic dynamic buckling of the composite plate.Under the action of the elastoplastic stress wave,the conclusion is the same as that under the elastic stress wave,indicating the boundary condition,impact velocity a nd axial inertia.The stress wave effect has an effect on the elastic-plastic dynamic buckling of composite plates.5.Using ABAQUS software to simulate the dynamic buckling of rigid mass impact composite plates,the basic model of rigid mass impact compos ite plate is established,and the impact end clamp is supported,the other end is fixed and the impact end is simply supported,and the other end is fixed.The effects of impact velocity,critical length,impact quality and layup angle on dynamic buckling are analyzed,and the simulation results are compared with MATLAB numerical results.The results show that the buckling waveform of the clamped boundary conditions is different from that the simple boundary conditions,and the peak value of the clamped boundary conditions waveform is smaller than the other,the results indicating that the boundary condition has an effect on the elastic dynamic buckling of the composite plate.With the increase of critical length and mass,the buckling continues to grow,and the higher-order modes are excited,indicating that the stress wave effect and axial inertia have an effect on the elastic buckling of the composite sheet;under the action of the elastoplastic stress wave,the conclusion and elasticity are obtained.The law under the action of stress wave is the same,indicating that the boundary condition,stress wave effect and axial inertia have an effect on the elastic-plastic dynamic buckling of composite plates.The simulation results are basically consistent with t he numerical calculation results,indicating that the stress wave effect is considered and the axial inertia is considered.It is feasible to use differential method to solve the dynamic buckling of rigid mass impact composite plates.