Buckling Analysis of Corroded Angle Beams with Irregular Random Surfaces

Abstract

Yielding, excessive deformation, brittle fracture, fatigue, and elastic buckling are different modes of failure of structures. Buckling or instability occurs in structures under compressive stresses. Corrosion is a time-dependent degradation which reduces load-bearing capacity. This article investigates the detrimental effect of corrosion on reduction of elastic buckling strength of angle beams with irregular random surfaces. Different corrosion patterns and corrosion parameters are considered. Comparing the results with those available in the literature, it indicates that simulation technique used in this study has good accuracy and applicability for simulation of irregular random surfaces of corroded structures. It also shows that neglecting irregular random surface of corroded angle beams could leads up to 6% overestimation of buckling load. It is found that irregularity of surface has little influence on reduction of buckling load when roughness is low, however, for high values of roughness, the more roughness of surface the lower buckling strength of angle beams.