压缩载荷下金属波纹夹层梁稳定性试验与数值分析

Experiment and numerical analysis on the stability of metal corrugated sandwich beams under compression loads

针对一个激光焊接金属波纹夹层梁模型,设计轴向压缩载荷下稳定性试验方案,通过试验获得夹层梁结构失稳临界载荷(极限载荷)及破坏模式。采用有限元软件ANSYS计算、探讨轴向压缩载荷下夹层梁结构的稳定性,数值计算结果与试验结果吻合较好。最后,对夹层梁结构在轴向压缩载荷下的临界失稳承载能力进行参数化分析。计算结果表明:在增加相同重量的前提下,增加下面板的厚度或芯层的厚度更有利于提高夹层梁结构的轴向临界失稳承载能力。

An experimental scheme for the stability of the laser-welded metal sandwich beam under axial compression loads is designed in this paper. The critical load and failure mode of the sandwich beam are also obtained through the experiment. Meanwhile, the stability of the sandwich beam is analyzed by using the numerical software ANSYS, where the simulation results agree well with the experimental data. Then,the effect of geometric parameters on the critical buckling bearing capacity of the sandwich beam under axial compression loads is studied, and the results show that increasing the thickness of the bottom face sheet as well as the thickness of the core layer is superior in improving the critical buckling bearing capacity of the sandwich beam if the same weight is to be added.