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对于夹胶玻璃等结构,由于中间胶层很弱,层合板结构的层间剪切效应占主导地位。此时经典层合板理论以及整体高阶剪切位移场理论所预测的结果可能导致很大的实际误差,应采用更加精细的力学模型来分析弱层的效应。本文建立了分层位移场假设下的浅柱面层合板静力计算模型以及自振周期计算模型,并同经典层合板理论计算结果对比,分析了中间层的剪切模量、弹性模量、层合板曲率半径对层间剪切效应的影响。计算结果表明:中间层的剪切模量对层合板的受力性能有着决定性的影响,相对来说中间层的弹性模量对层合板性能的影响不太显著;当中间层与面层的剪切模量比值小于0.2时,随着中间层剪切模量的减小,两个模型的计算误差急剧增大。
For structures such as laminated glass, the interlayer shear effect of the laminate structure dominates due to the weak interlayer glue. In this case, the results predicted by classical laminate theory and the whole higher-order shear displacement field theory may lead to great practical errors. A more elaborate mechanical model should be used to analyze the effect of weak layers. In this paper, the static calculation model and the periodic model of natural vibration under the assumption of layered displacement field are established. Compared with the theoretical calculation results of classical laminates, the shear modulus, elastic modulus, Effect of Laminar Curvature Radius on Interlayer Shear Effect. The calculated results show that the shear modulus of the middle layer has a decisive influence on the mechanical properties of the laminate, while the elastic modulus of the middle layer has little effect on the properties of the laminate. When the middle layer and the shear of the surface layer When the shear modulus ratio is less than 0.2, the calculation errors of the two models increase sharply with the decrease of the shear modulus of the middle layer.