Effect of Ridgeline Radius on the Maximum Bending Moment of Thin-walled Square Tubes

Abstract

The buckling behavior of square tubes with ridgelines was studied by pure bending analysis. The increase in ridgeline radius R leads to the increase in maximum bending moment M_max, which is resulted from the suppression of elastic buckling. This is because the increase in normalized maximum bending moment M_max/My is large compared to the decrease in section modulus Z.