EVALUATION ON PLASTIC BUCKLING LOAD OF AXIALLY COMPRESSED LATTICED CYLINDERS

This study focuses plastic buckling of axially compresses latticed cylinders. Following the past experimental studies, FE buckling analysis of relatively thick latticed cylinders made of aluminum was carried out. Axially symmetric buckling, the so-called ‘elephant leg’ buckling, was observed in plastic region. Axially symmetric imperfection was found more effective than the asymmetric 1st-eigenmode proportional imperfection in reducing plastic buckling load.