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运用半经验公式对采用搅拌摩擦焊接技术的加筋板轴向压缩局部屈曲临界应力进行工程计算,并应用有限元软件ABAQUS对该型结构的稳定性进行数值计算,得到结构的失稳屈曲临界载荷;参考工程计算和有限元计算值,对加筋板进行轴向压缩试验,对其屈曲形式、失稳及破坏载荷进行试验研究,并考虑侧边支持条件对结果的影响。试验分析表明,非承载边的约束条件对试件的屈曲载荷有一定的影响,而对试件的承载能力影响较小;搅拌摩擦焊加筋板具有一定的后屈曲承载能力;有限元计算结果与试验结果较吻合,说明模拟方法可以用来对该型结构的稳定性能进行分析,从而为该型结构的优化设计及工程应用提供分析参考。
The semi-empirical formula is used to calculate the local buckling critical stress of stiffened plate subjected to friction stir welding. The stability of the structure is numerically calculated by finite element software ABAQUS, and the critical buckling load of the structure is obtained. Based on engineering calculation and finite element analysis, the stiffened plate was subjected to axial compression test, and its buckling form, buckling and failure load were studied. The influences of side support conditions on the results were also considered. Experimental analysis shows that the restraint condition of non-bearing edge has a certain influence on the buckling load of the specimen, but has little effect on the bearing capacity of the specimen; the friction stir welded stiffener has some post-buckling bearing capacity; the finite element calculation result The results are in good agreement with the experimental results, which shows that the simulation method can be used to analyze the stability of the structure and provide an analytical reference for the optimization design and engineering application of the structure.