RADIATION DAMAGE STUDY (RADS). VOLUME XIII -- DYNAMIC RESPONSE OF BEAMS, PLATES, AND SHELLS TO PULSE LOADS
AVCO MISSILES SPACE AND ELECTRONICS GROUP WILMINGTON MA AVCO MISSILE SYSTEMSDIV
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Two types of response are treated, dynamic plastic bending of beams and circular plates under transient lateral loads, and dynamic pulse buckling of bars and cylinders under transient axial thrust or lateral pressure. For each type, the fundamental theory is developed first for the simple beam or bar and then extended to the more complex structural elements. In the bending problems, both simply supported and clamped boundaries are treated. The loads are of the blast type, consisting of a sudden rise to a peak load followed by a decay to zero pressure in an arbitrary duration, including the extremes of an ideal impulse and a step load. Numerical examples are given for rectangular, triangular, and exponential decay shapes. In the buckling problems, simply supported bars under both elastic and plastic thrust are treated for eccentric impact and for bars with random imperfections. Buckling of cylindrical shells is treated for transient lateral blast pressures, again over the entire range of durations. In both the bending and buckling problems, experimental results are given to demonstrate the mechanisms of deformation and the accuracy of the theories in calculating maximum bending deformations or critical buckling loads.
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