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An elastic-plastic model on the dynamic response of composite sandwich beams subjected to mass impact

机译：冲击力作用下复合夹层梁动力响应的弹塑性模型

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摘要

An elastic-plastic model is proposed to predict the dynamic response of a simply supported composite sandwich beam when subjected to a mass impact at the mid-span of the beam. A simplified relationship between the bending moment and the rotation angle of a bending hinge is introduced. The idealized bending hinge is used in the elastic-plastic model for the dynamic response of composite sandwich beams. An analytical solution is obtained to predict the dynamic response. The dynamic response corresponding to different impact intensities is characterized by three different regimes, i.e. elastic response regime, core crushing failure regime and final failure regime. Parameter studies are carried out to investigate the influences of various non-dimensional variables. The analytical results are discussed and compared with experimental results.
机译：提出了一种弹塑性模型来预测简单支撑的复合夹层梁在梁的中跨处受到质量冲击时的动力响应。介绍了弯矩与弯曲铰链旋转角度之间的简化关系。理想的弯曲铰链在弹塑性模型中用于复合夹层梁的动力响应。获得了解析解决方案来预测动态响应。对应于不同冲击强度的动力响应的特征在于三种不同的状态，即弹性响应状态，岩心破碎破坏状态和最终破坏状态。进行参数研究以研究各种无量纲变量的影响。讨论了分析结果，并与实验结果进行了比较。

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