Chen, Meng;
Wang, Huicheng;
Zhang, Tong;
Wang, Yuting;
Zhang, Mingzhong;
(2025)
Improving the dynamic compressive behavior of self-compacting cementitious composites through 3D printed functionally-graded auxetic nylon lattice structures.
Journal of Building Engineering
, 115
, Article 114574. 10.1016/j.jobe.2025.114574.
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Abstract
As an innovative class of advanced metamaterials, functionally-graded auxetic lattices demonstrate remarkable potential in tailoring energy absorption and deformation compatibility of composite structures. This study presents a novel integration of 3D-printed functionally graded auxetic nylon lattices within self-compacting mortar, systematically investigating their static and high-strain-rate dynamic behavior to reveal the reinforcing and orientation-dependent energy absorption mechanisms of gradient auxetic composites. The results reveal that the gradient auxetic lattices achieve 198 %–202 % greater static compressive strength than uniform lattices, attributed to the synergistic effects of enhanced load-bearing capacity in coarse struts and improved structural stability through progressive failure mechanisms. Moreover, the gradient lattice reinforced self-compacting mortar shows 13.6 % superior static compressive strength compared to uniformly reinforced specimens. In addition, the gradient lattice reinforced self-compacting mortar exhibits higher strain-rate sensitivity with directional dependence, displaying 10.3 %–17.1 % higher compressive strength under coarse-strut-side impacts versus fine-strut-side impacts within the measured strain rates. The findings highlight the advantage of gradient auxetic lattices in optimizing the ductility of cementitious composite structures, offering a reasonable pathway to enhance the resilience of infrastructure under extreme loading.
| Type: | Article |
|---|---|
| Title: | Improving the dynamic compressive behavior of self-compacting cementitious composites through 3D printed functionally-graded auxetic nylon lattice structures |
| DOI: | 10.1016/j.jobe.2025.114574 |
| Publisher version: | https://doi.org/10.1016/j.jobe.2025.114574 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Auxetic lattice composites; Functionally graded structures; Self-compacting mortar; 3D printing technology; Dynamic compressive properties |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10217257 |
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