Additively Manufactured Auxetic Structures: A Review
DOI:
https://doi.org/10.54097/6hdhp320Keywords:
3D printing, Auxetic structures, MetamaterialsAbstract
Auxetic structures exhibit mechanical behaviors that are significantly different from those of conventional materials. They expand laterally under tensile loading and contract laterally under compressive loading, which provides advantages in energy absorption, impact resistance, indentation resistance, and structural stability. In recent years, the rapid development of additive manufacturing, particularly 3D printing, has enabled the precise fabrication of complex auxetic structures that are difficult to achieve using traditional manufacturing methods, thereby greatly promoting related research and applications. This paper reviews the research progress of 3D printed auxetic structures. First, common 3D printing technologies used for fabricating complex structures, including fused deposition modeling (FDM), stereolithography (SLA), and selective laser sintering (SLS), are introduced. Then, the development history and structural types of auxetic structures are summarized. Furthermore, recent advances in the structural design and mechanical performance of 3D printed auxetic structures are reviewed, along with their applications in impact protection, aerospace, biomedical engineering, and vibration isolation. Finally, the main challenges and future development trends of 3D printed auxetic structures are discussed. The integration of advanced manufacturing technologies with structural optimization is expected to further expand the application potential of auxetic structures.
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