不同焊接工艺 TC2 加筋壁板压缩破坏模式研究

[Objective] The effects of different joining processes—riveting, spot welding, argon arc welding, and laser welding—on the compressive buckling behavior and failure modes of TC2 titanium alloy stiffened panels were investigated. [Methods] Integral stiffened panels were designed and fabricated for compression testing to determine buckling loads, failure loads, and failure modes. Analytical buckling theories and finite element (FE) models using solid elements were employed to analyze the buckling and post-buckling behaviors, with numerical results compared against test data. [Results] The results indicate that while welded panels exhibit significantly higher buckling and failure loads than riveted and spot-welded panels, the latter shows a higher failure-to-buckling load ratio. Failure in riveted and spot-welded panels is characterized by global buckling, whereas welded panels fail due to local buckling involving skin bulging and rib torsion. The FE simulations show good agreement with test values, with errors within 10%, effectively capturing the rib torsion and skin deformation details.