Integral forming of continuous CFRP sandwich sheet by additive manufacturing

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...

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Bibliographic Details
Published in:International journal of material forming 2023-11, Vol.16 (6), Article 63
Main Authors: Nishi, Kazusa, Sato, Yuji, Yanagimoto, Jun
Format: Article
Language:English
Subjects:
Additive manufacturing
Aerospace industry
CAE) and Design
Carbon fiber reinforced plastics
Computational Intelligence
Computer-Aided Engineering (CAD
Continuous fibers
Control
Design parameters
Digital imaging
Dynamical Systems
Engineering
Machines
Manufacturing
Materials Science
Mechanical Engineering
Mechanical properties
Original Research
Processes
Strain distribution
Vibration
Weight reduction
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Summary: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.
ISSN:1960-6206
1960-6214
DOI:10.1007/s12289-023-01788-7