【摘要】 为了提高金属波纹结构的承载效率,充分发挥泡沫铝在能量吸收方面的优势,设计了泡沫铝填充金属波纹三明治夹芯梁。针对波纹结构各向异性的特点,对其横向和纵向2个方向在三点弯曲载荷作用下的力学响应及破坏模式进行了试验研究。研究表明,泡沫铝的填充可以有效改变金属波纹夹芯梁的弯曲破坏模式,其弯曲刚度和峰值载荷均得到了大幅提升。和横向弯曲相比,金属波纹夹芯梁在纵向弯曲时具有更强的承载能力,且泡沫铝填充的增强效果更加显著。纵向弯曲时载荷在达到峰值后并不会突然下降而是呈现出很长的平台区,表现出更强的后屈曲承载能力。更多还原

【Abstract】 Aluminum foam-filled corrugated sandwich beam was designed using aluminum foam as filling material to improve the load bearing efficiency of metallic sandwich beam with corrugated cores. Considering the anisotropy of the corrugated structure, both transverse and longitudinal bending response and failure modes were studied by three-point bending test. The result shows that aluminum foam filling can effectively change the bending failure mode of corrugated sandwich beam, leading to a significant increase of bending stiffness and peak bending load. Compared with transverse bending, the enhancement effect of aluminum foam filling on longitudinal bending is more significant, and corrugated sandwich beam has stronger bearing capacity in longitudinal bending. The bending loads presents a long plateau region after its peak without notable decline, showing a stronger post-buckling Load-bearing capacity.更多还原