Abstract The low-velocity impact response of 2D granular crystals immersed in various fluids over a wide range of viscosities (1–106 cP) was investigated. The drag effects in the immersed crystals results in significantly higher wave attenuation as compared to dry granular crystals. In order to quantify the spatial dependence of the wave decay characteristics, the coefficients of attenuation were computed for the dry granular crystals and granular crystals immersed in various fluids. The coefficient of attenuation for immersed granular crystals was significantly larger than the coefficient of attenuation for dry granular crystals. As the viscosity increased, the coefficient of attenuation also increased due to the additional drag effects followed by an unexpected decrease for the highest viscosity fluids. The ratio of kinetic energy to strain energy for immersed granular crystals decreases initially as a function of viscosity but increases again for the fluids with the highest viscosities.

中文翻译：

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波在很宽的流体粘度范围内通过浸没的颗粒介质传播

摘要 研究了浸入各种粘度（1-106 cP）的各种流体中的二维粒状晶体的低速冲击响应。与干粒状晶体相比，浸入晶体中的阻力效应导致显着更高的波衰减。为了量化波衰减特性的空间依赖性，计算了干粒状晶体和浸入各种流体中的粒状晶体的衰减系数。浸渍粒状晶体的衰减系数明显大于干粒状晶体的衰减系数。随着粘度增加，衰减系数也增加，这是由于额外的阻力效应，随后是最高粘度流体的意外下降。