Induction heating simulation for aircraft RTM toolings

IF 2.5 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications Pub Date : 2024-08-05 DOI:10.1177/14644207241270761

L Brieskorn, M Rahman

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Abstract

Aircraft CFRP parts as sharklets are produced in resin transfer molding (RTM) tooling. The parts need to be heated up homogenously over the whole area with a constant temperature. The complex shape and accessibility of the tooling make it hard to introduce a common heating system. In addition, the heat must be transferred through the Invar metal tooling structure onto the CFRP. Infrared lamp, air fan and microwave heating are concepts in development. Electrical heating layer mats and cages are laborious in applying. Induction has the advantage of contact-less, efficient, and fast heating. Induction heating was tested for the structural bonding of CFRP frames and stringers showing high bonding strengths. To apply this technology for the RTM tooling, the placement and distance of the induction coils is important. Simulation can help to find the right adjustments and power needed for induction heating. With the program COMSOL the surface and the coils are modeled, and the numerically structured net is divided in small tetrahedron and quadratic sub elements. Since there is no magnetic streamline in the middle of the coil-section, a symmetric halving of the structure is applied as a boundary condition. The temperature-time development and the distance of the coils are simulated in 2D and 3D. Due to the material properties of the magnetic flux concentrator (MFC), higher flux concentration of the magnetic field occurred only in 2D. The results are validated by experiments and are in good agreement.

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飞机 RTM 模具感应加热模拟

飞机 CFRP 部件（如鲨鱼小翼）是用树脂传递模塑（RTM）模具生产的。部件需要在整个区域以恒定的温度均匀加热。由于模具形状复杂且易于接近，因此很难采用通用的加热系统。此外，热量必须通过因瓦金属模具结构传递到 CFRP 上。红外线灯、风扇和微波加热是正在开发的概念。电加热层垫和电加热笼的应用非常费力。感应加热具有无接触、高效和快速的优点。对 CFRP 框架和弦杆的结构粘接进行了感应加热测试，结果显示粘接强度很高。要将这项技术应用于 RTM 工具，感应线圈的位置和距离非常重要。模拟可以帮助找到感应加热所需的正确调整和功率。利用 COMSOL 程序对表面和线圈进行建模，并将数值结构网划分为小四面体和二次子元素。由于线圈截面中间没有磁流线，因此采用对称减半结构作为边界条件。温度-时间发展和线圈距离分别以二维和三维方式进行模拟。由于磁通量集中器（MFC）的材料特性，只有在二维情况下才会出现较高的磁通量集中。实验对结果进行了验证，结果非常吻合。

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

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 工程技术-材料科学：综合

CiteScore

4.70

自引率

8.30%

发文量

166

审稿时长

3 months

期刊介绍： The Journal of Materials: Design and Applications covers the usage and design of materials for application in an engineering context. The materials covered include metals, ceramics, and composites, as well as engineering polymers. "The Journal of Materials Design and Applications is dedicated to publishing papers of the highest quality, in a timely fashion, covering a variety of important areas in materials technology. The Journal''s publishers have a wealth of publishing expertise and ensure that authors are given exemplary service. Every attention is given to publishing the papers as quickly as possible. The Journal has an excellent international reputation, with a corresponding international Editorial Board from a large number of different materials areas and disciplines advising the Editor." Professor Bill Banks - University of Strathclyde, UK This journal is a member of the Committee on Publication Ethics (COPE).