Research on a novel annealing strategy for AFP of thermoplastic composites

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2025-06-10 DOI:10.1016/j.compositesb.2025.112706

Hui Li , Yinhui Li , Zhanchun Chen , Jianglin Liu , Runtian Zhao , Xiaodong Zhao , Jianguo Liang

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Abstract

In laser-assisted in-situ consolidation technology, the products are subjected to highly rapid cooling due to the relatively narrow heating zone and fast layup speed, resulting in reduced crystallinity, insufficient interlayer bonding, and warpage deformation. This study developed a line-focused infrared heater (LFIH) that is easy to integrate with automated fiber placement (AFP) equipment and validated its effectiveness in annealing thermoplastic composites (TPCs). A comprehensive mathematical model was developed to correlate the structural characteristics of the LFIH with the heat flow field, coupling it with a 3D finite element model utilizing the DFLUX subroutine to predict the evolution of the temperature field distribution. The results indicate that the LFIH effectively achieves strong focusing characteristics, fulfilling the requirements for the annealing treatment of TPCs. Furthermore, the simulation and experimental results exhibit close agreement, with peak annealing temperature discrepancies among layers maintained within 7 %. After annealing treatment with the LFIH, the crystallinity and interlayer properties of the layup products were improved, while the porosity and warpage deformation of the layup products were reduced. This novel, high-energy-density annealing strategy effectively enhances the quality of laminates.

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热塑性复合材料AFP退火新策略研究

在激光辅助原位固结技术中，由于加热区相对较窄，叠加速度较快，产品冷却速度较快，导致结晶度降低，层间结合不足，出现翘曲变形。本研究开发了一种易于与自动纤维放置（AFP）设备集成的线聚焦红外加热器（LFIH），并验证了其在热塑性复合材料（tpc）退火中的有效性。建立了一个综合的数学模型，将LFIH的结构特征与热流场联系起来，并结合三维有限元模型，利用DFLUX子程序预测温度场分布的演变。结果表明，LFIH有效地实现了强聚焦特性，满足了tpc退火处理的要求。此外，模拟结果与实验结果非常吻合，层间退火温度的峰值差异保持在7%以内。经LFIH退火处理后，叠层产品的结晶度和层间性能得到改善，而叠层产品的孔隙率和翘曲变形降低。这种新颖的高能量密度退火策略有效地提高了层压板的质量。

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

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.