纳米泡沫金属压制动力学的流体力学模拟研究
Compaction dynamics of metallic nano-foams: A hydrodynamics simulation study
摘要：
利用辐射流体力学程序对低密度泡沫铜的压缩过程进行了数值模拟。在一个模拟中，泡沫的密度为$ρ_0 = 1.3407$ g/cm $^3$，为标准温度和压力下铜密度的15%，并且由直径为$4.0\times10^{-7}$ cm的标准密度圆柱形铜细丝的缠结组成。在另一个模拟中，泡沫是具有相同密度的均匀材料。测量了冲击波（$U_f$）通过泡沫的传播速度，并与实验结果进行了比较。模拟结果与$U_f$的实验结果基本一致，并与不同状态方程和分子动力学模拟的估计值一致。的泡沫的冲击波之前的行为也进行了讨论，其中的泡沫的多孔性允许蒸汽前体的形成。
英文摘要：
The compression of a low-density copper foam was simulated with a radiation, hydrodynamics code. In one simulation, the foam had a density of $ρ_0 = 1.3407$ g/cm$^3$, 15% the density of copper at standard temperature and pressure, and was composed of a tangle of standard density cylindrical copper filaments with a diameter of $4.0\times10^{-7}$ cm. In another simulation, the foam was a uniform material at the same density. The propagation velocity of the shock wave ($U_f$) through the foam was measured and compared with experimental results. The simulations show approximately the same agreement with experimental results for $U_f$ and agreed with estimates from different equations of state and simulations using molecular dynamics. Behavior of the foam ahead of the shock wave is also discussed where the porous nature of the foam allows for the formation of a vapor precursor.
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