瓦楞夹层结构动态力学性能评估

Dynamic proprty evaluation for a corrugated sandwich structure

以典型的瓦楞夹层结构——瓦楞纸板为例,研究了不同应变率下的A、B、C、E型多层瓦楞纸板的力学性能。结果表明由于变形机制的不同造成动态平台应力值比静态平台应力值有明显的增加。采用中等应变率下评估动态应力的Cowper-Symonds方程与试验数据相结合,构建了一个综合考虑结构参数和应变率效应的多层瓦楞纸板的动态平台应力的预测方程。结果表明:随着应变率的增加,多层瓦楞纸板的平台应力明显增加;经过标准化后的方程能够较全面的用于多层瓦楞纸板的动态平台应力的预测,同时,该方程对于其他材质的瓦楞夹层结构的力学性能的研究有重要的参考价值。

The mechanical property of MLCP（multi-layer corrugated paperboard）with different flutes representing a typical corrugated sandwich structure under various strain rates was investigated here.Compared with its static stress, the dynamic stress of MLCP increases apparently due to different levels of deformation.The method of Cowper-Symonds combined with test data under median strain rate was utilized to construct a model considering structural parameters and strain rate effect conprehensively.The study results showed that the stress of MLCP increases with increase in strain rate;the proposed model after nrmalized and its equation can be used to predict the dynamic stress of MLCP with a certain accuracy;the proposed model after normalized and its equation provide a reference for investigation of dynamic property of corrugated sandwich structures made of other materials.