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Electric Current Analysis for Thick Laminated CFRP Composites

机译：厚层CFRP复合材料的电流分析

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摘要

This paper deals with a new lamination theory to calculate the electric current density on carbon fiber reinforced plastic (CFRP) laminates. Unidirectional CFRP has strong orthotropic electric conductance. When electric current is applied to the surface of a CFRP plate, the electric voltage field is not uniform in the thickness direction for thick CFRP. The electric current concentrates near the surface where the electric current is applied to thick CFRP laminates. In this study, a new lamination theory for thick CFRP laminates is proposed. The theory for thick CFRP assumes a non-uniform electric voltage distribution in the thickness direction. For non-thick and non-thin CFRP plates, an approximation method is proposed. To obtain the shape of the non-uniform voltage distribution, the analytical results of thick unidirectional ply from a previous paper is adopted as a contribution function to calculate the effective conductance of the thick CFRP laminate. Cross-sectional two-dimensional (2D) FEM analysis is used to obtain the contribution function for the non-thick CFRP plate. The proposed methods are applied to two cases of the thick CFRP plates, and the results are compared with the three-dimensional (3D) FEM results. Consequently, the new lamination theory is shown to be very effective for the CFRP plates.
机译：本文研究了一种新的层压理论，以计算碳纤维增强塑料（CFRP）层压板的电流密度。单向CFRP具有很强的正交各向异性电导率。当将电流施加到CFRP板的表面时，对于厚CFRP，电压场在厚度方向上不均匀。电流集中在向厚CFRP层压板施加电流的表面附近。在这项研究中，提出了一种新的厚CFRP层压板层压理论。厚CFRP的理论假设厚度方向上的电压分布不均匀。对于非厚，非薄的CFRP板，提出了一种近似方法。为了获得不均匀电压分布的形状，采用先前论文中的厚单向层的分析结果作为贡献函数，以计算厚CFRP层压板的有效电导率。截面二维（2D）有限元分析用于获得非厚CFRP板的贡献函数。所提出的方法应用于两种情况下的厚CFRP板，并将结果与​​三维（3D）有限元结果进行比较。因此，新的层压理论对CFRP板非常有效。

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