Assessment of ply thickness and aluminum foils interleaving on the impact response of CFRP composites designed for cryogenic pressure vessels

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Composite Structures Pub Date : 2024-09-14 DOI:10.1016/j.compstruct.2024.118563

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Abstract

Carbon fiber reinforced polymer (CFRP) proved to be the best choice to produce cryogenic pressure vessels coupling a reduced weight with superior mechanical performance. Despite this, CFRPs are prone to fuel leakage due to interconnected matrix cracks resulting from mechanical and thermal stresses. Two strategies were combined in this work to reduce fuel permeability, i.e., increase of plies number and metallic film interleaving, evaluating the cryogenic impact response of these new configurations. At first, the only ply thickness effect was assessed and the hybrid sandwich-like (SL) configuration with traditional CFRP (RC) skins and a thin-ply (TP) core displayed impact and residual flexural properties close to RC ones. Then, the effect of aluminum foils interleaving was investigated, and the interleaved SL configuration displayed higher residual flexural properties than interleaved RC for all temperatures, e.g., the residual flexural strength was 30.3 % higher at room temperature and 14.6 % higher at −70 °C, respectively.

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评估层厚和铝箔交错对低温压力容器 CFRP 复合材料冲击响应的影响

事实证明，碳纤维增强聚合物（CFRP）是生产低温压力容器的最佳选择，它既能减轻重量，又具有优异的机械性能。尽管如此，由于机械应力和热应力导致基体出现相互连接的裂缝，CFRP 很容易发生燃料泄漏。这项研究结合了两种策略来降低燃料渗透性，即增加层数和金属膜交错，并对这些新结构的低温冲击响应进行了评估。首先，只评估了层厚的影响，带有传统 CFRP（RC）表皮和薄层（TP）内核的混合夹层（SL）结构显示出接近 RC 结构的冲击和残余挠曲性能。然后，研究了铝箔交错的影响，交错的 SL 配置在所有温度下都比交错的 RC 显示出更高的残余抗弯性能，例如，室温下的残余抗弯强度比 RC 高 30.3%，而在 -70 °C 下则高 14.6%。

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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.