Interaction between critical torsional flexural and lip buckling in channel sections

摘要

The energy method is first used to find the critical stress for anti-symmetric lip buckling, for may given half-wave length, including the preferred half-wave length. The energy method is then applied to describe the critical buckling interaction between the torsional-flexural and anti-symmetric lip modes, and its effect in reducing the critical stress. The results obtained by the energy solutions are validated by those obtained by finite element eigenvalue analyses.