The development of lightweight, impact-resistant, and high energy-consuming materials is of great significance for improving the defense capabilities of military equipment. As a new type of damping material, metal rubber has demonstrated great potential for application in the field of impact protection. In this paper, the dynamic mechanical response of metal rubber under a high strain rate is studied, which provides a new idea for developing high-performance protective materials. The stress-strain curves, energy absorption performance, and wave transmission performance of metal rubber at various strain rates were investigated based on a split-Hopkinson pressure bar (SHPB) device. The dynamic stress-strain curve of metal rubber is divided into three stages: elastic stage, plastic stage, and failure stage. The optimal energy absorption efficiency is greater than 0.5, and the maximum value can reach 0.9. The wave transmittance is less than 0.01. The dynamic mechanical tests have proved that metal rubber has excellent energy absorption capacity and impact resistance property. A constitutive model based on Sherwood–Frost was established to predict the dynamic mechanical behavior of metal rubber. The results of comparison between the calculation and the experiment show that the constitutive model can accurately predict the dynamic mechanical performance of metal rubber.

中文翻译：

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高速冲击载荷下金属橡胶动态力学行为的实验与本构模型研究

开发轻质，耐冲击，高耗能的材料对于提高军事装备的防御能力具有重要意义。金属橡胶作为一种新型的阻尼材料，在冲击防护领域具有广阔的应用前景。本文研究了金属橡胶在高应变速率下的动态力学响应，为开发高性能防护材料提供了新思路。基于分体式霍普金森压力棒（SHPB）装置研究了金属橡胶在不同应变速率下的应力-应变曲线，能量吸收性能和波传输性能。金属橡胶的动态应力-应变曲线分为三个阶段：弹性阶段，塑性阶段和破坏阶段。最佳能量吸收效率大于0.5，最大值可以达到0.9。波透射率小于0.01。动态力学试验证明，金属橡胶具有优异的能量吸收能力和抗冲击性能。建立了基于Sherwood-Frost的本构模型来预测金属橡胶的动态力学行为。计算与实验的比较结果表明，本构模型可以准确预测金属橡胶的动态力学性能。建立了基于Sherwood-Frost的本构模型来预测金属橡胶的动态力学行为。计算与实验的比较结果表明，本构模型可以准确预测金属橡胶的动态力学性能。建立了基于Sherwood-Frost的本构模型来预测金属橡胶的动态力学行为。计算与实验的比较结果表明，本构模型可以准确预测金属橡胶的动态力学性能。