A unified approach for the prediction of the effective properties of laminated composite cellular core
A unified approach for the prediction of the effective properties of laminated composite cellular core
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DOI：
10.1016/j.engstruct.2023.117106
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发表时间：
2024-01
影响因子：
5.5
通讯作者：
Jasotharan Sriharan;Marcelo Dias;Dilum Fernando;S. Adhikari
中科院分区：
文献类型：
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作者：
Jasotharan Sriharan;Marcelo Dias;Dilum Fernando;S. Adhikari
蜂窝夹芯板的性能受蜂窝夹芯板和蒙皮的几何和材料参数的选择影响很大。为了确定夹层板的最优设计，将蜂窝芯的几何和材料参数与夹层板的最终性能联系起来是很重要的。理论均匀化模型具有计算效率高的特点，在夹层板的反设计中起着重要作用。本文提出了一种确定复合蜂窝核心系统等效均匀化性质的方法。该方法是基于基于应变能的均化方法开发的。与已有的模型不同，本文提出的模型适用于不同的芯体形状和不同的复合墙层配置。为了比较的目的，进一步扩展了现有的模型，以确定六角复合材料蜂窝芯材的等效性能。将两种模型的计算结果与六角蜂窝芯材的有限元计算结果进行了比较，并与不同蜂窝芯材形状的有限元计算结果进行了比较。预测结果与有限元计算结果吻合较好。在考虑不同芯层形状和复合墙层形状方面，所提出的模型优于现有模型。
The performance of cellular core sandwich panels is influenced significantly by the choice of geometric and material parameters of the cellular core and skins. In order to determine the optimal design of sandwich panels, it is important to relate the geometric and material parameters of the cellular core to the resulting performance of the sandwich panel. Theoretical homogenisation models are computationally efficient and plays an important role in the inverse design of sandwich panel. This paper presents a methodology to determine the equivalent homogenised properties for composite cellular core systems. The methodology was developed based on a strain energy-based homogenisation approach. Unlike other existing models, the proposed model in this paper is applicable to different core shapes and different composite wall layer configurations. An existing model was further extended for comparison purposes to determine the equivalent properties of hexagonal composite honeycomb core. Results from both models were compared with finite element (FE) results for hexagonal honeycomb cores, and the predictions from the proposed model are also compared with FE results for different cellular core shapes. A good agreement was found between the predicted and FE results. The proposed model was found to be superior to existing models in its ability to consider different core shapes and composite wall layer configurations.