Tunable properties and responses of architected lattice-reinforced cementitious composite components induced by versatile cell topology and distributions
Tunable properties and responses of architected lattice-reinforced cementitious composite components induced by versatile cell topology and distributions
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DOI：
10.1016/j.compstruct.2023.116850
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发表时间：
2023-02
影响因子：
6.3
通讯作者：
Binglin Xie;Xinyue Li;Xinyu Zhao;Nan Hu
中科院分区：
文献类型：
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作者：
Binglin Xie;Xinyue Li;Xinyu Zhao;Nan Hu
添加剂制造的最新进展使蜂窝结构晶格具有前所未有的性能，如超轻重量和高韧性，与固体晶格相比。然而，在了解几何变化对复合材料构件结构响应的影响方面仍然存在挑战。在这项研究中，我们开发了具有多种几何特征的建筑格子增强复合材料(LRC)的“设计材料”方法。在试验和模拟的指导下，我们描述了LRC试件在轴压和三点弯曲作用下的加固机理，并证实了几何变化对LRC试件的强度、延性和能量吸收的影响。分析了晶格体积比和空间布置对LRC梁弯曲响应的影响。为每种情况确定了适当的几何选择。我们设想，通过设计，我们的LRC材料可以为进一步提高利用架构化网格开发轻量级、高性能和可定制结构系统的潜力铺平道路。
Recent advances in additive manufacturing have enabled cellular architected lattices with unprecedented properties such as ultralight weight and high toughness compared to their solid counterparts. However, continuing challenges remain in understanding the influence of geometric variations on the structural response of composite components. In this study, we exploit the “materials by design” approach for architected lattice-reinforced composite (LRC) with versatile geometric features. Guided by experimental tests and simulations, we characterized the reinforcing mechanism of LRC specimens subjected to axial compression and three-point bending and confirmed the effects of geometric variations on the strength, ductility, and energy absorption of LRC specimens. We also evaluated the effect of lattice volume ratio and spatial arrangements on the flexural response of LRC beams. Appropriate geometric selections were identified for each scenario. We envision that our LRC materials by design can pave the way to further improve the potential of harnessing architected lattices for developing lightweight, high-performance, and tailorable structural systems.