When carbon composites are exposed to a transient electromagnetic field, a rapid temperature increase can be observed due to joule heating from magnetic induction. The electromagnetic induction heating and heat transfer in the composite are anisotropic and concentrated upon the carbon fiber orientation and distribution. In addition, the strength and frequency of transient electromagnetic fields have great influence on the final quality of the composite. A computational model has been developed by solving coupled Maxwell’s and heat transfer equations. The analysis accounts for the three-dimensional transient electromagnetic field and electrical conductivity of the composite material. This paper will illustrate the derived formulation and numerical solution based on finite element methods. The developed code is validated with a 2D closed-form solution. Numerical simulations of a cylinder and a flat laminated plate are conducted to illustrate the computational capability. The induction heating for composite manufacture is also discussed for current Army’s applications.

中文翻译：

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瞬态磁场作用下复合结构的电磁分析

当碳复合材料暴露在瞬态电磁场中时，由于磁感应产生焦耳热，可以观察到温度迅速升高。复合材料中的电磁感应加热和传热是各向异性的，并且集中在碳纤维的取向和分布上。此外，瞬态电磁场的强度和频率对复合材料的最终质量有很大影响。通过求解耦合的麦克斯韦方程和传热方程已经开发了一个计算模型。该分析考虑了复合材料的三维瞬态电磁场和电导率。本文将说明基于有限元方法的导出公式和数值解。开发的代码通过二维封闭形式的解决方案进行验证。进行了圆柱体和平面层压板的数值模拟，以说明计算能力。还针对当前陆军的应用讨论了用于复合材料制造的感应加热。