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The effect of filament winding mosaic pattern on the stress state of filament wound composite flywheel disk

机译：细丝缠绕镶嵌图案对细丝缠绕复合飞轮盘应力状态的影响

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摘要

A filament wound spinning composite disk is characterised by the mosaic pattern configuration produced during the filament winding process. In this structure, each helically wound layer consists of curved triangular shaped units alternating in the radial and circumferential directions. Filament wound composite shells are usually analysed based on the implementation of mechanics of composite laminates. Usually, the mosaic pattern configuration is not considered in the general stress analysis procedures based on the conventional modelling of laminated composite structures, including those available in finite element analysis packages. However, the filament winding mosaic pattern of the composite layer could significantly affect the stress field developed due to rotational loading. This paper presents results of the finite element modelling and stress analysis of a filament wound spinning composite disk with different types of filament winding mosaic pattern. The disk has also been modelled and analysed using conventional method and differences in the predicted stress values from both techniques are demonstrated through stress distributions. As illustrated, the level of stresses in the thin filament wound composite flywheel disk could be underestimated by the structural analysis based on conventional mechanics of laminated structures.
机译：细丝缠绕的旋转复合盘的特征在于在细丝缠绕过程中产生的镶嵌图案配置。在这种结构中，每个螺旋缠绕层由在径向和圆周方向上交替的弯曲三角形单元组成。通常根据复合材料层压板的力学性能来分析纤维缠绕复合材料外壳。通常，在基于层压复合结构常规建模的常规应力分析程序中，不考虑镶嵌图案的配置，包括那些在有限元分析软件包中可用的模型。但是，复合层的细丝缠绕镶嵌图案可能会显着影响由于旋转载荷而产生的应力场。本文介绍了具有不同类型的细丝缠绕镶嵌图案的细丝缠绕旋转复合盘的有限元建模和应力分析结果。还使用常规方法对磁盘进行了建模和分析，并且通过应力分布证明了两种技术的预测应力值之间的差异。如图所示，细丝缠绕的复合飞轮盘中的应力水平可能会根据基于叠层结构常规力学的结构分析而被低估。

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