Auextic materials possessing negative Poisson's ratios have gained great research interest by virtue of its various exotic mechanical properties while most of these metamaterials rely on the hollow cellular configuration, largely undermining the overall mechanical performance. It therefore restricts their application in load-bearing engineering fields. In order to solve this issue, we first designed a new class of chiral structures by integrating various polynomial curves. Based on the state-of-the-art 3D printing technique, these auxetic geometries were then fabricated into high-performance composites with chopped carbon fiber (CF) as the reinforcement. Guided by experimental characterization and finite element analysis, the influences of the polynomial orders (n) and the incorporation of CF on the mechanical properties were systematically studied. Results showed that the auxetic behaviour can be tailored by varying the n value inside the polynomial equation. Moreover, the tensile modulus, strength and energy absorption at break of printed chiral samples were all enhanced with the addition of CF, especially for the large improvement of modulus and absorbed energy by 2-fold. Hence, these novel chiral composites present great potential in the development of high performance mechanical metamaterials.

具有负泊松比的共晶材料由于其各种奇特的机械性能而引起了极大的研究兴趣，而这些超材料中的大多数都依赖于中空的蜂窝结构，从而大大破坏了整体机械性能。因此，它限制了它们在承重工程领域中的应用。为了解决这个问题，我们首先通过整合各种多项式曲线设计了一类新的手性结构。基于最先进的3D打印技术，然后将这些膨胀几何形状制成短切碳纤维（CF）作为增强材料的高性能复合材料。在实验表征和有限元分析的指导下，多项式阶数（n），并研究了CF对机械性能的影响。结果表明，可以通过改变多项式方程中的n值来调整拉力行为。此外，添加CF可以提高印刷手性样品的拉伸模量，强度和断裂时的能量吸收，特别是对于模量和吸收能量的2倍提高而言。因此，这些新颖的手性复合材料在高性能机械超材料的开发中具有巨大的潜力。