Abstract Variation of pore size is relevant for both the growth of voids during fracture and the compaction of pores at compression of a porous medium. In this work we examine the previously proposed continuum model of dislocation-stimulated growth of nanovoids in Al to the case of Cu for both tension and compression of the sample with a previously cut pore. Results of continuum model are verified and parameters are fitted using the molecular dynamics(MD) simulations. Dependencies of surface tension and energy of dislocation formation on temperature are obtained from fitting procedure. Continuum model allows one to adequately describe the evolution of pressure, pore radius and dislocation density with time during both tension and compression in the MD system.

中文翻译：

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铜中纳米孔的生长和坍塌动力学

摘要 孔隙尺寸的变化与断裂过程中孔隙的增长和多孔介质压缩过程中孔隙的压实有关。在这项工作中，我们检查了先前提出的位错刺激在铝中纳米空隙生长的连续介质模型，在铜的情况下，对于具有先前切割的孔的样品的拉伸和压缩。使用分子动力学（MD）模拟验证连续介质模型的结果并拟合参数。表面张力和位错形成能量对温度的依赖性是从拟合过程中获得的。连续模型允许人们充分描述在 MD 系统中拉伸和压缩期间压力、孔隙半径和位错密度随时间的演变。