Integral forming of continuous CFRP sandwich sheet by additive manufacturing

IF 2.6 3区材料科学 Q2 ENGINEERING, MANUFACTURING International Journal of Material Forming Pub Date : 2023-09-27 DOI:10.1007/s12289-023-01788-7

Kazusa Nishi, Yuji Sato, Jun Yanagimoto

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Abstract

Sandwich sheets comprising continuous carbon fiber reinforced plastics (CFRP) are applied mainly in the aerospace industry due to their light weight and high rigidity. However, sandwich sheets require separate formation and bonding of the face sheets and core, resulting in high labor costs and early fracture due to delamination of the adhesive layer. The purpose of this study is to overcome these problems by integrating sandwich sheet using additive manufacturing. The mechanical properties of the integrally formed sandwich sheets were compared with those of adhesively formed sandwich sheets using a three-point bending test. The strain distribution was captured by digital image correlation (DIC) during the test. Additionally, the geometric design parameters of a core with superior mechanical properties were investigated. The test results showed that the integrally formed specimens exhibited superior properties compared to those of the adhesively formed specimens. It was also observed that the larger the width angle of the corrugated core, the better the mechanical properties.

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连续CFRP夹芯板的增材制造整体成形

由连续碳纤维增强塑料(CFRP)组成的夹层板由于其重量轻、刚性高，主要应用于航空航天工业。然而，夹心板需要将面板和芯分开形成和粘合，导致人工成本高，并且由于胶粘剂层的分层而导致早期断裂。本研究的目的是通过使用增材制造集成三明治板来克服这些问题。采用三点弯曲试验对整体成型夹层板的力学性能与粘结成型夹层板的力学性能进行了比较。通过数字图像相关(DIC)技术捕获了试验过程中的应变分布。此外，还研究了具有优异力学性能的岩心的几何设计参数。试验结果表明，整体成形试样的性能优于粘结成形试样。波纹芯的宽度角越大，其力学性能越好。

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

International Journal of Material Forming ENGINEERING, MANUFACTURING-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

5.10

自引率

4.20%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal publishes and disseminates original research in the field of material forming. The research should constitute major achievements in the understanding, modeling or simulation of material forming processes. In this respect ‘forming’ implies a deliberate deformation of material. The journal establishes a platform of communication between engineers and scientists, covering all forming processes, including sheet forming, bulk forming, powder forming, forming in near-melt conditions (injection moulding, thixoforming, film blowing etc.), micro-forming, hydro-forming, thermo-forming, incremental forming etc. Other manufacturing technologies like machining and cutting can be included if the focus of the work is on plastic deformations. All materials (metals, ceramics, polymers, composites, glass, wood, fibre reinforced materials, materials in food processing, biomaterials, nano-materials, shape memory alloys etc.) and approaches (micro-macro modelling, thermo-mechanical modelling, numerical simulation including new and advanced numerical strategies, experimental analysis, inverse analysis, model identification, optimization, design and control of forming tools and machines, wear and friction, mechanical behavior and formability of materials etc.) are concerned.