Mechanical behaviour of 3D printed carbon fibre reinforced composite metastructure with various filling rates

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Composite Structures Pub Date : 2024-07-30 DOI:10.1016/j.compstruct.2024.118421

引用次数: 0

Abstract

This paper evaluated the influence of filling rate and printing direction on the mechanical properties of composite metastructure via experimental and numerical approaches. A representative volume element (RVE) and finite element method were adopted to estimate the tensile and flexural properties and verify the applicability of these methods in the 3D printing of composite metastructure. Results showed that apparent tensile and flexural properties drop with decreasing filling rates. The tensile and flexural strength reached 70.7 MPa and 131.1 MPa for solid specimens. The bending test for samples with different printing directions showed that the printing direction of the core has no noticeable effect on flexural strength, but the +45°/-45° sample exhibited the highest modulus. The numerical estimation showed similar trend compared to experimental results for both tensile and flexural properties. Such an attempt indicates the feasibility of designing a composite metastructure with an optimum weight-strength relationship.

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不同填充率的 3D 打印碳纤维增强复合材料结构的力学性能

本文通过实验和数值方法评估了填充率和打印方向对复合材料结构力学性能的影响。采用代表体积元素法（RVE）和有限元法估算了拉伸和弯曲性能，并验证了这些方法在三维打印复合材料结构中的适用性。结果表明，表观拉伸和弯曲性能随着填充率的降低而下降。实心试样的拉伸和弯曲强度分别达到 70.7 兆帕和 131.1 兆帕。对不同印刷方向的样品进行的弯曲测试表明，芯材的印刷方向对弯曲强度没有明显影响，但 +45°/-45° 样品的模量最高。在拉伸和弯曲性能方面，数值估算结果与实验结果显示出相似的趋势。这一尝试表明，设计具有最佳重量-强度关系的复合材料结构是可行的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.