This study presents an approach to enhancing and expanding the structural performance of composite materials by tailoring their geometry. We explored the potential of continuous carbon fiber composite additive printing to create complaint frames based on hexagonal cell design with the aim to better understand and control their mechanical performance. Our investigation examines the failure behaviour of these frames under remote tensile loading. By experimenting with various geometries and aspect ratios at the frame sites, we gained insight into different failure loads and modes. To predict these results, we developed a computational model based on multiscale homogenisation and the Hashin damage criterion, which showed a high degree of precision compared to our experimental results. The findings validate the effectiveness of our computational model, but also highlight the practical applications of additive manufacturing of composites. This research aims to contribute to the advancement of structural design and material optimization by engineering of composite materials for specific applications, emphasizing the integration of their intrinsic strength and lightweight properties with material efficiency and compliance achieved through geometric design considerations.

中文翻译：

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3D打印复合材料连续碳纤维六边形框架的失效

这项研究提出了一种通过定制复合材料的几何形状来增强和扩展复合材料结构性能的方法。我们探索了连续碳纤维复合材料增材打印的潜力，以创建基于六边形单元设计的顺应框架，目的是更好地理解和控制其机械性能。我们的研究检查了这些框架在远程拉伸载荷下的失效行为。通过在框架部位试验各种几何形状和纵横比，我们深入了解了不同的失效载荷和模式。为了预测这些结果，我们开发了一个基于多尺度均质化和 Hashin 损伤准则的计算模型，与我们的实验结果相比，该模型显示出很高的精度。研究结果验证了我们的计算模型的有效性，同时也强调了复合材料增材制造的实际应用。这项研究旨在通过针对特定应用的复合材料工程来促进结构设计和材料优化的进步，强调将其内在强度和轻质特性与通过几何设计考虑实现的材料效率和合规性相结合。