Bending mechanical properties and failure mechanism of spreading fabric/felt needled C/C laminated composites

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2025-03-07 DOI:10.1016/j.compstruct.2025.119047

Zhongwei Fang, Yang Tao, Diantang Zhang

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引用次数: 0

Abstract

Needled carbon/carbon (C/C) composites are widely used in the field of aerospace. However, how to reduce the porosity and improve the mechanical properties is still a key problem. This paper presents the bending damage performance and failure mechanisms of spreading fabric/felt needled C/C laminated composites(SFNCCs). Three kinds of SFNCCs, B-NPs (16 mm spreading fabric and felt layers), H-NPs (8 mm spreading fabric and felt layers), and T-NPs (outer B-NPs with inner H-NPs structure), were innovatively designed and prepared. The fabricated composites were subsequently evaluated through three-point bending tests. Furthermore, a multi-scale model was established and the damage initiation/evolution of SFNCCs were simulated. Results indicated that the simulated displacement load curve closely aligns with the experimental data. The maximum bending load of T-NPs is 439.2 N, which exceeds that of B-NPs and H-NPs by 12.59 % and 24.23 %, respectively, indicating that T-NPs’ superior load-bearing capabilities. The main failure mechanisms of B-NPs and T-NPs are both controlled by fiber fracture, whereas that of H-NPs are typically influenced by fiber pullout, fiber fracture and fiber–matrix interfacial debonding.

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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.