Progressive buckling under both constant axial load and cyclic distortion a practical rule of prevention

摘要

Thin structures submitted to compressive loads oust be carefully designed to avoid any risk of ruin by buckling. The aim of this paper is, first, to evidence that the critical buckling load may be notably lowered when cyclic strains are added tothe compressive load and, secondly, to propose a practical rule of prevention against the ruin duo to the progressive buckling phenomenon. This rule is validated by the results of numerous tests related to the entire range of modes of buckling (i.e. fromfully plastic to fully elastic).Practical cases of interest for its use could mainly be those where cyclic thermal stresses are involved.