Geometric design and performance of single and dual-printed lattice-reinforced cementitious composite
Geometric design and performance of single and dual-printed lattice-reinforced cementitious composite
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DOI：
10.1016/j.cemconcomp.2023.105266
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发表时间：
2023-08
影响因子：
10.5
通讯作者：
Man Chen;Xianhua Yao;Lu Zhu;Meishan Yin;Yan Xiong;Nan Hu
中科院分区：
文献类型：
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作者：
Man Chen;Xianhua Yao;Lu Zhu;Meishan Yin;Yan Xiong;Nan Hu
增材制造的最新进展使得具有可编程几何形状和可定制性能的增材材料的设计和制造成为可能，但在将它们集成到复合材料设计中仍然存在挑战。在这项工作中，我们利用了一种复合设计策略，即通过单材料和双材料打印制造嵌入三维重入（3DR）晶格的胶凝材料单元。通过实验测试，确定了增材制造参数对刚性和柔性3DR晶格力学性能的影响。然后，我们表征了嵌入3DR晶格的晶格增强胶结复合材料（LRCC）单元的压缩行为，这些3DR晶格采用刚性、柔性和具有不同空间分布的双材料印刷。尽管LRCC单元中嵌入的3d打印材料较弱，但我们发现了类似的最终强度和更高的吸能能力。在具有不同几何图案的LRCC柱上也发现了类似的观察结果。我们设想，我们提出的复合设计策略可以生产出具有高性能和生产效率的下一代低碳材料系统，以实现可持续的建筑环境。
Recent advances in additive manufacturing have enabled the design and fabrication of auxetic materials with programmable geometries and tailorable properties, but ongoing challenges remain in integrating them for composite design. In this work, we exploit a composite design strategy on cementitious material units embedded with three-dimensional re-entrant (3DR) lattices fabricated by single and dual material printing. Guided by experimental tests, the effect of additive manufacturing parameters on the mechanical properties of rigid and flexible 3DR lattices is confirmed. Then, we characterize the compressive behavior of lattice-reinforced cementitious composite (LRCC) units embedded with 3DR lattices printed using rigid, flexible, and dual materials with various spatial distributions. We found comparable ultimate strengths and higher energy-absorbing capabilities despite weaker 3D-printed materials embedded in LRCC units. A similar observation was found on LRCC columns with various geometric patterns. We envision that our proposed composite design strategy can produce next-generation low-carbon material systems with high performance and production efficiency toward a sustainable built environment.