Meso-scale modelling of shock wave propagation in a SiC/Al nanocomposite reinforced with WS2-inorganic fullerene nanoparticles
Meso-scale modelling of shock wave propagation in a SiC/Al nanocomposite reinforced with WS2-inorganic fullerene nanoparticles
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DOI：
10.1016/j.compstruct.2012.08.039
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发表时间：
2013-02
影响因子：
6.3
通讯作者：
E. Volkova;I. A. Jones;R. Brooks;Yanqiu Zhu;E. Bichoutskaia
中科院分区：
文献类型：
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作者：
E. Volkova;I. A. Jones;R. Brooks;Yanqiu Zhu;E. Bichoutskaia
据推测，将IF-WS 2纳米颗粒结合在强基质中的纳米复合材料可能会形成下一代高抗冲击材料。目前的工作描述了通过顺序的多尺度动态分析的冲击响应的这种材料的初步分析。采用密度泛函理论计算了多层WS 2纳米粒子的弹性性质。这些属性，然后使用内的显式有限元（FE）分析波传播通过嵌入式统计体积元（SVE）的两相纳米复合材料组成的矩阵与IF-WS 2纳米粒子。注意到一些波前分散，特别是在基质的模量与颗粒的模量显著不同的情况下。还考虑了由铝基体与IF-WS 2和SiC纳米颗粒组成的三相纳米复合材料，并且显示出比两相纳米复合材料更明显的波前色散。冲击波传播数据已从模拟输出中导出。它的结论是，这些系统的顺序多尺度建模是适当的，可以提供有用的信息冲击波在弹性区域的传播。这项工作还提供了一个基础，更逼真的模拟在更高的速率加载，这将是必要的，将材料故障的模型。
It has been postulated that nanocomposites incorporating IF-WS2nanoparticles within a strong matrix might form the next generation of highly shock-resistant materials. The present work describes initial analyses into the shock response of such materials via a sequential multi-scale dynamic analysis. Density functional theory is used to calculate the elastic properties of the multilayered WS2nanoparticles. These properties are then used within an explicit finite element (FE) analysis of wave propagation through an embedded statistical volume element (SVE) of a two-phase nanocomposite consisting of a matrix with IF-WS2nanoparticles. Some wave front dispersion was noted, particularly where the modulus of the matrix is significantly different from that of the particles. A three-phase nanocomposite consisting of an aluminium matrix with IF-WS2and SiC nanoparticles was also considered, and showed more apparent wave front dispersion than for the two-phase nanocomposite. Hugoniot shock propagation data have been derived from the simulation outputs. It is concluded that sequential multiscale modelling of these systems is appropriate and can provide useful information about shock wave propagation in the elastic region. The work also provides a foundation for more realistic simulations at higher rate loading, where it will be necessary to incorporate material failure in the models.