Wudi Du , Zhongde Shan , Feng Liu , Xiaochuan Wu , Zhe Chen , Guisheng Zou
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引用次数: 0
摘要
三维（3D）预制件的结构是三维增强复合材料性能的关键。为了提高制造质量和效率，本文最初提出了超声波振动辅助多循环压实法。利用共振频率为 40 kHz 的压实机对三维碳纤维预型件进行超声波振动压实。与传统方法相比，超声波振动辅助多循环压实法能加速应力松弛，减少预成型回弹。利用 X 射线计算机断层扫描成像技术观察了预成型件的微观结构。它阐明了超声振动促进纤维滑移的机理。预型件的压实成型实验证明，超声波振动辅助多循环压实法可以缩短压实时间，提高成型质量。这为提高三维预制棒的制造水平提供了技术支持。
Research on ultrasonic-assisted vibration multi-cycle compaction method of flexible guided 3D weaving
The structure of three-dimensional (3D) preforms is the key to the performance of 3D reinforced composites. In order to improve the quality and efficiency of manufacturing, this paper originally proposes the ultrasonic vibration-assisted multi-cycle compaction method. Ultrasonic vibrations are applied, using a resonant 40 kHz compactor, to the compaction of 3D carbon fiber preform. Compared to the traditional method, the ultrasonic vibration-assisted multi-cycle compaction method can accelerate stress relaxation and reduce preform springback. The microstructure of preform is observed using x-ray computer tomography imaging. It elucidates the mechanism by which ultrasonic vibration promotes fiber slippage. The compaction forming experiment of preforms has proven that the ultrasonic vibration-assisted multi-cycle compaction method can reduce the compaction time, improving the forming quality. This can improve the technical support for the improvement of the manufacturing level of the 3D preform.
期刊介绍：
Ultrasonics is the only internationally established journal which covers the entire field of ultrasound research and technology and all its many applications. Ultrasonics contains a variety of sections to keep readers fully informed and up-to-date on the whole spectrum of research and development throughout the world. Ultrasonics publishes papers of exceptional quality and of relevance to both academia and industry. Manuscripts in which ultrasonics is a central issue and not simply an incidental tool or minor issue, are welcomed.
As well as top quality original research papers and review articles by world renowned experts, Ultrasonics also regularly features short communications, a calendar of forthcoming events and special issues dedicated to topical subjects.
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