An equivalent material formulation for sinusoidal corrugated cores of structural sandwich panels
An equivalent material formulation for sinusoidal corrugated cores of structural sandwich panels
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DOI：
10.1016/j.compstruct.2012.12.042
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发表时间：
2013-06-01
影响因子：
6.3
通讯作者：
Baldanzini, Niccolo
中科院分区：
文献类型：
--
作者：
Bartolozzi, Giorgio;Pierini, Marco;Baldanzini, Niccolo
由于其高刚度质量比，带有波纹芯的金属夹芯板作为结构部件是一种颇具吸引力的工业解决方案。然而，使用详细的有限元模型对其属性进行数值计算会导致模型庞大且求解时间较长，尤其是对于声学模拟。因此，通常采用将复杂形状的芯材简化为等效均质材料的方法。本文研究了一种具有正弦波纹芯材的创新型铝夹芯板。对于所选的 Reissner-Mindlin 正交各向异性表示，等效材料的属性通过分析和数值确定。在综合参数研究中对两个导出模型进行比较，以验证计算成本低得多的分析公式。此外，基于夹芯板单位宽度的弯曲刚度对等效模型进行了验证。最后，通过将简化的分层模型与完全详细的 3D 模型进行比较，研究了结构的声学行为。 (C) 2013 Elsevier Ltd. 保留所有权利。
Metal sandwich panels with corrugated cores are an appealing industrial solution as structural components thanks to their high stiffness-to-mass ratio. Nevertheless, using detailed finite element models for numerical computation of their properties leads to large models and long solution time, especially for acoustic simulations. Therefore, reduction of the complex shaped core to an equivalent homogenous material is commonly used.In this paper, an innovative aluminum sandwich panel with sinusoidal corrugated core is investigated. The properties of the equivalent material are determined both analytically and numerically for the chosen Reissner-Mindlin orthotropic representation. The two derived models are compared in a comprehensive parametric study to validate the computationally much cheaper analytical formulation. Moreover, a validation of the equivalent models is done based on the bending stiffness per unit width of the sandwich panel. Finally, the acoustic behavior of the structure is investigated comparing the reduced layered model with the fully detailed 3D model. (C) 2013 Elsevier Ltd. All rights reserved.