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New unified model of composite sandwich panels/beams buckling introducing interlayer shear effects

机译：新型统一模型复合三明治板/梁屈曲引入层间剪切效果

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In this paper, a new exact analytical solution of buckling of sandwich panels/beams is presented. The transverse shear deformation of the face-sheet (caused by the interlayer shear effect), which has been usually neglected in previous works, is considered for the first time in our theoretical framework. In the constituent phases of the sandwich plates, the core is assumed to be isotropic, and the faces are assumed to be orthotropic, so the model can be applied to sandwich plates with composite faces. Next, the solution is compared with different results in the literatures, and the finite element computations is then carried out as a standard for measuring the accuracy. It is shown that the present solution leads to better accuracy after considering the transverse shear effect. Despite the global buckling mode is also involved in this unified solution, the emphasis of this study is on the wrinkling (short-wave) mode; the authors have shown that the transverse shear effect is particularly apparent in those short-wave modes. In the end, we determine a boundary where the shear effect will produce a non-negligible influence to the critical buckling of sandwich plates.
机译：本文介绍了夹层板/光束屈曲的新精确分析解。在我们的理论框架中首次考虑通常忽略的面板（由中间层剪切效果引起的横剪变形，这在我们的理论框架中首次考虑。在夹层板的组成相中，假设芯是各向同性的，并且假设面部是正向性的，因此该模型可以用复合面施加到夹层板上。接下来，将解决方案与文献中的不同结果进行比较，然后作为测量精度的标准进行有限元计算。结果表明，本溶液在考虑横向剪切效果后导致更好的精度。尽管全球屈曲模式也参与了这一统一解决方案，但本研究的重点是皱纹（短波）模式;作者表明，在这些短波模式下横向剪切效果特别明显。最后，我们确定剪切效果将对夹心板的关键屈曲产生不可忽略的影响的边界。

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