Abstract

Quasi-static indentation tests were conducted to characterize the mechanical behavior of honeycombs. The local failure mechanisms of honeycombs with different relative density were discussed in detail. Results showed that the spread area of tearing deformations increases with increasing relative density and that difference in the neatness of tearing edges are obvious under different indenter shapes and sizes. The effects of indenter geometry on the plateau force and energy absorption of the honeycombs were analyzed. The tear energy of the specimens was determined, and an empirical formula was proposed to describe the relationship of energy absorption with indenter geometry.

摘要

进行准静态压痕测试以表征蜂窝的机械性能。详细讨论了不同相对密度的蜂窝的局部破坏机理。结果表明，在不同压头形状和尺寸下，撕裂变形的扩展面积随相对密度的增加而增大，且撕裂边缘的整齐度差异明显。分析了压头几何形状对蜂窝的平台力和能量吸收的影响。确定了试样的撕裂能量，并提出了经验公式来描述能量吸收与压头几何形状的关系。