四点弯曲载荷下金属波纹夹层梁极限承载能力试验与数值分析

摘要

In this paper, a laser-welded metal supporting sandwich beam model is tested under the condi⁃tion of four-point bend loading, where the failure mode of the beam structure is obtained, and the ultimate load bearing capacity of the structure under four-point bending loads is analyzed with finite element soft⁃ware ANSYS. The experimental results reveal good agreement with numerical ones. Finally, the influences of the thickness of the front face, the back face, the core web, and the depth of the core of the corrugated sandwich beam on its ultimate bearing capacity are investigated in detail. Results show that when the mass of corrugated sandwich beam is equally increased to improve the ultimate bearing capacity, increasing the thickness of the front face and the depth of the core are most effective. In contrast, increasing the thickness of the front face or the core web less effective.%针对激光焊接金属波纹夹层梁模型，进行四点弯曲试验，获得夹层梁结构的破坏模式。采用有限元软件ANSYS，分析四点弯曲载荷下该结构的极限承载能力，结果表明，数值计算结果与试验结果吻合良好。进一步分析波纹夹层梁上面板厚度、下面板厚度、芯层板厚度及芯层高度对其极限承载能力的影响。数值结果表明：在增加同等质量以提高波纹夹层梁的结构极限承载能力时，增加芯层高度和上面板厚度是较为有效的方式，相比之下，增加芯层厚度或下面板厚度对提高极限承载能力的效率要低一些。