Considering the effect of stress wave, the non-axisymmetric dynamic buckling governing equation of composite cylindrical shells under axial step load is derived by using the Hamilton principle. The expression of radial displacement function along the circumferential direction is got since the cylindrical shell is closed. The analytical solution of the critical load on the dynamic buckling of composite cylindrical shell and buckling modes can be obtained based on Variable Separation method before the reflection of stress wave. Comparing the critical load with the result got by Ritz method, the results show that the difference between them is equal to the value caused by rotational inertia. The influences of diameter-thickness ratio, ply orientations, etc. on critical load are analyzed by programming with MATLAB software, and the results show that the critical load will increase and the buckling modes will be more complex for high circumferential modes, and the effect of rotational inertia on critical load can be neglected.
Key words
composite /
stress wave /
dynamic buckling /
non-axisymmetric /
analytical solution
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