| Coupling of two-dimensional atomistic and continuum models for dynamic crack |
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| 作者姓名： | 任国武 汤铁钢 |
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| 作者单位： | Institute of Fluid Physics China Academy of Engineering Physics |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （Grants Nos. 11102191 and 11172279） and the Development Foundation of Institute of Fluid Physics, Chinese Academy of Engineering Physics （Grant No. SFZ20120402）. |
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| 摘 要： | A concurrent multiscale method of coupling atomistic and continuum models is presented in the two-dimensional system. The atomistic region is governed by molecular dynamics while the continuum region is represented by construct- ing the mass and stiffness matrix dependent on the coarsening of the grids, which ensures that they merge seamlessly. The low-pass phonon filter embedded in the handshaking region is utilized to effectively eliminate the spurious reflection of high-frequency phonons, while keeping the low-frequency phonons transparent. These schemes are demonstrated by numerically calculating the reflection and transmission coefficient, and by the further application of dynamic crack propa- gation subjected to mode-I tensile loading.
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| 关 键 词： | 动态裂纹 连续模式 二维系统 原子论 耦合 多尺度方法 分子动力学 刚度矩阵 |
Coupling of two-dimensional atomistic and continuum models for dynamic crack |
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| Ren Guo-Wu and Tang Tie-Gang.Coupling of two-dimensional atomistic and continuum models for dynamic crack[J].Chinese Physics B,2014(11):655-664. |
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| Authors: | Ren Guo-Wu and Tang Tie-Gang |
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| Institution: | Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China |
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| Abstract: | concurrent multiscale method, phonon filter, dynamic crack |
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| Keywords: | concurrent multiscale method phonon filter dynamic crack |
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