抄録
Recently, there is an increasing possibility that machines and structures are subjected to a series of impact loads caused by earthquake-motions, collisions between members, and so on. When we design such machines and structures, therefore, it is of importance to establish their safety against the cyclic impact loads of various cyclic numbers. To this aim, it is indispensable to clarify the dynamic buckling strengths of bar-like elements, which are recognized as basic components of the machines and the structures, under dynamic cyclic loading that is more close to real loading condtions. In the present study, subsequent dynamic buckling strengths of long aluminum bars subjected to cyclic light-impact loads of cycle numbers of 100 to 10000 times, and impact velocities from 1.0 to 3.0 m/s are experimentally investigated, and the influences of the cyclic numbers and the magnitude of the cyclic impact load on the dynamic buckling strengths of columns are clarified.
