Technical Paper
The Ultimate Bending Resistance of Thin-walled Square Tube with Strengthened Ridgelines
2024-04-09
2024-01-2265
Based on Kecman's idealized folding element model of rectangular tube and plastic bending theory, the static bending mechanism, ridgeline strengthening effect and energy dissipation mode of thin-walled square tube with strengthened ridgelines were analyzed theoretically. By introducing the yield strength ratio λ of strengthened ridgeline to plate and the strengthening coefficient multiplier R, the theoretical prediction expression of maximum bending moment of thin-walled square tube with strengthened ridgelines under static cantilever bending condition is obtained. Then, the software of Hypermesh 13.0 was used to establish two quasi-static finite element simulation comparison models under the corresponding static cantilever conditions. One model was designed for the original material thin-walled square tube, and another one was designed for the thin-walled square tube with strengthened ridgelines. After that, the LS-DYNA 971 solver was introduced to perform the solution calculations.