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建立了铝中相交裂纹的分子动力学模型,通过嵌入原子法进行模拟,采用速度加载的分子动力学方法研究了含相交裂纹的铝裂纹扩展行为。通过观察不同时刻的原子轨迹图和能量演变曲线图来研究相交裂纹扩展和演变行为。结果表明,加载速度增大,促进了角度裂纹的扩展。随着角度裂纹的夹角增大,角度裂纹就越难扩展并且扩展路径更加复杂。
A molecular dynamics model of intersecting cracks in aluminum was established. By means of embedding atomic method, the crack growth behavior of aluminum crack with intercrossing cracks was studied by molecular dynamics method with velocity loading. The propagation and evolution of intersecting cracks are studied by observing atomic orbit diagrams and energy evolution curves at different moments. The results show that the loading speed increases, which promotes the expansion of angle crack. As the angle between the angle cracks increases, angle cracks become more difficult to expand and the path of expansion becomes more complicated.