建筑结构学报2026，Vol.47Issue(8)：184-200,17.DOI:10.14006/j.jzjgxb.2025.0208
3D打印水泥基内凹六边形负泊松比结构的力学性能研究
Mechanical performance of 3D-printed cementitious concave hexagonal auxetic structures
摘要
Abstract
Concave hexagonal structure(CHS)has attracted much attention in many fields,but research on cementitious CHS is still limited,and its application in civil engineering is mostly in the conceptual stage.A cementitious CHS was proposed.Multiple sets of specimens with different geometric parameters were prepared by mold casting and 3D printing.The deformation mode,negative Poisson's ratio(NPR)effect and energy absorption performance under quasi-static compression were systematically studied.In addition,a finite element model was developed based on ABAQUS to further analyze the dynamic response of CHS under impact load.The test results demonstrate that both concave angle and side-length ratio significantly influence deformation stability of CHS,and the parameter mismatch can easily lead to structural instability.Due to the directional arrangement of the fibers along the printing direction,the first peak stress of the printed specimen is higher than that of the cast-in-place specimen,and the side length ratio of 2.3 is increased by about 42.3％.The NPR effect is derived from the synergistic effect of concave inclined wall rotation and fiber bridging,and there is stress concentration in the concave area.The finite element analysis shows that the average compressive stress of CHS decreases first and then increases as concave angle increases from 50° to 70°.Among them,the specimen with concave angle of 60° and side length ratio of 2.0 shows better comprehensive performance in terms of deformation stability and crush-force efficiency.Under the impact load,the inertial effect dominates the deformation evolution of CHS multi-cell components,and the volumetric specific energy absorption increases significantly as the impact velocity increases.关键词
内凹六边形结构/水泥基/3D打印/负泊松比结构/吸能特性Key words
concave hexagonal structure/cementitious/3D printing/auxetic structures/energy absorption characteristics分类
建筑与水利引用本文复制引用
程站起,朱盼盼,康佳,张靖,冯虎..3D打印水泥基内凹六边形负泊松比结构的力学性能研究[J].建筑结构学报,2026,47(8):184-200,17.基金项目
河南省自然科学基金项目(242300421176),国家自然科学基金项目(11872339,11472248). （242300421176）
