This paper investigated the response and residual compression properties of honeycomb sandwich structures subjected to single quasi-static indentation (QSI) and repeated QSI (RQSI). The damage depth after repeated low-velocity impact (LVI) was considered as the governing parameter during the QSI experiments. Three-dimensional digital image correlation method was applied to determine deformation of the front panels after LVI and QSI to describe damage to honeycomb structures. For specimens with the same depth, it is found that the residual strength of QSI was less than that of LVI and close to that of RQSI. Results indicated that it is more reasonable to describe the damage by volume than by depth.

中文翻译：

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蜂窝夹层结构在单次和重复准静态压痕作用下的残余压缩特性及响应

本文研究了蜂窝夹层结构在单次准静态压痕 (QSI) 和重复 QSI (RQSI) 下的响应和残余压缩性能。重复低速撞击 (LVI) 后的损伤深度被视为 QSI 实验期间的控制参数。应用三维数字图像相关方法确定LVI和QSI后前面板的变形来描述蜂窝结构的损坏。对于相同深度的试件，发现QSI的残余强度小于LVI，接近RQSI。结果表明，用体积比用深度来描述损伤更合理。