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Dynamic behavior of polyurea composites subjected to high strain rate loading

机译：高应变率荷载作用的多脲复合材料的动态行为

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摘要

A comprehensive theoretical and experimental investigation is presented of the behavior of polyurea composites subjected to high strain-rate impact loading. The composites under consideration consist of an assembly of steel sections and inserts manufactured from layers of polyurea or polyurea augmented with aluminum layers (AL). A finite element model (FEM) is developed to predict the dynamics of this class of polyurea composites by integrating the dynamics of the solid steel sections with those of polyurea using the Golla-Hughes-Mctavish (GHM) mini-oscillator approach. The predictions of the developed FEM are compared to the predictions of the commercial finite element package ANSYS and validated experimentally by using the Split Hopkinson Pressure Bar (SHPB) at high strain rates ranging between 1000 s(-1) and 5000 s(-1). Comparisons are also established between the behavior of the different composite configurations in an attempt to demonstrate the effectiveness of these composites in mitigation of the structural response under impact loading. Close agreements are demonstrated between the theoretical predictions and the obtained experimental results. The presented theoretical and experimental tools are envisioned to enable the design of effective means for the mitigation of undesirable effects of impact and blast loading on many critical structures.
机译：介绍了对高应变率冲击载荷的聚脲复合材料的行为的综合理论和实验研究。所考虑的复合材料包括钢部分的组件和由聚脲或聚脲层制造的插入物，增强用铝层（Al）。开发了有限元模型（FEM）以通过使用Golla-Hughes-McTavish（GHM）迷你振荡器方法将固体钢部分的动态与聚脲的动态集成，预测这类聚脲复合材料的动态。将开发有限有限有限有限元的预测与商业有限元封装ANSSYS的预测进行了比较，并通过在高应变速率下通过在1000 s（-1）和5000s（-1）之间的高应变率下实验进行实验验证。在不同复合配置的行为之间也建立了比较，以试图证明这些复合材料的有效性在缓解冲击载荷下的结构应答。在理论预测和获得的实验结果之间证明了密切达成协议。设想了所提出的理论和实验工具，以使有效手段设计有效手段，以减轻对许多关键结构上的冲击和喷射负荷的不良影响。

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