Shear correction factors for corrugated core structures
Shear correction factors for corrugated core structures
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DOI：
10.1016/j.compstruct.2006.04.066
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发表时间：
2007-09
影响因子：
6.3
通讯作者：
P. Isaksson;A. Krusper;P. Gradin
中科院分区：
文献类型：
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作者：
P. Isaksson;A. Krusper;P. Gradin
由于对波纹板进行建模（例如，在有限元分析中）时涉及较高的计算成本，因此在本研究中对波纹芯夹层进行均质化，并将面板转变为具有有效相同属性的等效连续均质层。从数学上讲，瓦楞纸板面板被分成任意数量的薄虚拟层。对于每个虚拟层，计算唯一的有效弹性模块。然后，将所有层中的弹性特性组合在一起，以便能够将瓦楞纸板分析为具有与真实结构等效的机械特性的连续结构。结果表明，通过使用从平衡应力场导出的剪切修正因子，在瓦楞纸板面板受到弯曲的情况下，可以实现计算刚度和挠度的改进。按照概述的算法，剪切校正因子很容易计算，并成为对瓦楞纸板进行机械分析时的宝贵工具。通过几个数值示例，与不同几何形状的瓦楞纸板面板上的实验进行比较，证明了该模型正确捕捉和模拟瓦楞纸板在板弯曲和三点弯曲作用下的机械行为的能力。
Because of the high computational cost involved when modeling a corrugated panel (in e.g., finite element analyses) the corrugated core sandwich is in this investigation homogenized and the panel is transformed to an equivalent continuous homogenous layer with effective equal properties. Mathematically, the corrugated board panel is divided into an arbitrary number of thin virtual layers. For each virtual layer, unique effective elastic modules are calculated. Then, the elastic properties in all layers are assembled together in order to be able to analyze a corrugated board as a continuous structure having equivalent mechanical properties to a real structure. It is shown that by using shear correction factors derived from an equilibrium stress field, improvements in the calculated stiffness and deflections can be achieved in circumstances when a corrugated board panel is subjected to bending. Following the algorithm outlined, the shear correction factors are easy to calculate and become a valuable tool when performing mechanical analyses of corrugated boards. The capability of the model to properly capture and simulate the mechanical behavior of corrugated boards subjected to plate bending as well as three-point-bending has been demonstrated by means of several numerical examples, which are compared to experiments on corrugated board panels of varying geometry.