基于扁平蜂窝转化的 CFRP 蜂窝圆筒的制造和力学性能

IF 8.3 1区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES
Zhibin Li , Pengcheng Xue , Jian Xiong
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引用次数: 0

摘要

长期以来,大自然为高性能结构的设计提供了灵感,通过错综复杂的生物结构为工程创新提供了深刻的启示。合理设计复合曲面部件对于航空航天结构的轻质建造至关重要。在从平面结构过渡到曲面部件的过程中,任何形式上的不匹配都会引起高应力,从而可能导致结构受损或失效。从睡莲中汲取灵感,提出了一种从平面过渡到曲面的圆柱表面结构的合理设计和制造方法。实验和模拟验证了零泊松比蜂窝结构对圆柱表面的适应性。它们之间的不匹配关系会导致蜂窝的损坏失效。有鉴于此,我们采用所提出的方法制造了航空航天领域常用的蜂窝夹层圆柱体。对轴向压缩下的失效模式进行了理论预测和实验分析。由此绘制了蜂窝圆柱体的失效机理图。载荷-质量效率分析表明,面压破坏具有很高的承载效率。此外,还探讨了面片厚度的影响,并比较了单筒和夹层筒的失效模式和缺陷敏感性。结果表明,与单圆柱体相比,夹层圆柱体具有更高的特定承载能力和更低的缺陷敏感性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Fabrication and mechanical properties of CFRP honeycomb cylinder based on the transforming from the flat honeycombs

Fabrication and mechanical properties of CFRP honeycomb cylinder based on the transforming from the flat honeycombs
Nature has long inspired the design of high-performance structures, offering profound insights into engineering innovations through intricate biological architectures. The rational design of composite curved components is crucial for the lightweight construction of aerospace structures. In the transition from planar constructs to curved components, any mismatch in form can induce high stress, potentially leading to structural compromise or failure. Drawing inspiration from the water lily, a rational design and fabrication approach for cylindrical surface structures is proposed, transitioning from planar to curved surfaces. The adaptation of zero Poisson's ratio honeycomb to cylindrical surface is verified by experiments and simulations. The mismatch relationship between them would lead to the damage failure of the honeycomb. In view of this, the honeycomb sandwich cylinder commonly used in aerospace is fabricated by the proposed method. Theoretical predictions and experimental characterizations were conducted to analyze failure modes under axial compression. This led to the creation of a failure mechanism map for the honeycomb cylinder. Load-mass efficiency analysis revealed that face-crushing failure provides high bearing efficiency. Additionally, the effects of facesheet thickness, along with a comparison of failure modes and imperfection sensitivity between single and sandwich cylinders, were explored. The results indicate that the sandwich cylinder exhibits a higher specific load-bearing capacity and lower imperfection sensitivity compared to the single cylinder.
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来源期刊
Composites Science and Technology
Composites Science and Technology 工程技术-材料科学:复合
CiteScore
16.20
自引率
9.90%
发文量
611
审稿时长
33 days
期刊介绍: Composites Science and Technology publishes refereed original articles on the fundamental and applied science of engineering composites. The focus of this journal is on polymeric matrix composites with reinforcements/fillers ranging from nano- to macro-scale. CSTE encourages manuscripts reporting unique, innovative contributions to the physics, chemistry, materials science and applied mechanics aspects of advanced composites. Besides traditional fiber reinforced composites, novel composites with significant potential for engineering applications are encouraged.
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