平板焊接变形对铝合金搅拌摩擦焊加筋板轴压稳定性能的影响  

Influence of Weld-Induced Plate Distortion on Compressive Stability Performance of Friction Stir Welded Aluminum Alloy Stiffened Panel

作　　者：邵青[1] 何宇廷[1] 张腾[1] 冯宇[1] 

机构地区：[1]空军工程大学航空航天工程学院,西安710038

出　　处：《南京航空航天大学学报》2014年第6期963-968,共6页Journal of Nanjing University of Aeronautics & Astronautics

摘　　要：对搅拌摩擦焊加筋板筋条间平板的焊接几何变形形式进行了简化,参考Paik等人的统计分析结果给出了几何变形的幅值;采用有限元方法对结构的轴向压缩稳定性能进行数值计算,得到不同的几何变形形式对结构屈曲失稳和承载能力的影响,并分析了侧边支持条件对计算结果的影响。计算分析表明,总体上,文中定义的平板几何变形会使加筋板结构的一阶屈曲载荷增大,但会在一定程度上降低结构的承载能力;变形形式会影响结构的屈曲模态、屈曲载荷以及承载能力。Weld-induced geometric distortion of plate between the stiffeners of friction stir welded （FSW） stiffened panel is idealized.The plate distortion magnitude is defined according to the statistical data from Paik＇s analysis results.By the use of finite element method （FEM）,the stability performance of FSW stiffened panel subjected to longitudinal compression is calculated and the effects of plate distortion shapes and boundary conditions on the stability performance of the structure are analyzed.Calculation results show that,in general,the plate geometric distortion presented in this work increases the critical buckling load but reduces the ultimate strength of the structure.The plate distortion shape affects the buckling mode and buckling load as well as the ultimate strength of the structure.

关 键 词：搅拌摩擦焊 加筋板 几何变形 稳定性 有限元方法 

分 类 号：V214.4[航空宇航科学与技术—航空宇航推进理论与工程]