欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
利用基于第二代Brenner作用势的分子动力学方法，模拟单晶纳米金刚石在边界层圆盘模型近似（Ⅰ／Ⅱ）复合载荷作用下裂纹尖端微观结构演化，计算等效应力强度因子Keff。发现含（010）[100]裂纹和含（110）[110]裂纹的金刚石起裂时，裂纹端部具有不同的断裂模式，临界等效应力强度因子Keff变化也不同；（010）[100]裂纹在加载复合角θ变化过程中Keff很接近；而（110）[110]裂纹在θ〉60°后，彬eff大幅增加，表明金刚石起裂的异向性质。
英文摘要：
The evolution of atomic structures and equivalent stress-intensity-factors Keff of cracks in single-crystal nano- diamond, in whieh mixed-mode （ Ⅰ/Ⅱ） displacement loads were applied approximately by boundary-layer-disk model, were investigated by use of molecular dynamics simulation based on the second-generation Brenner potential. It was found that, fracture configurations and critical equivalent stress-intensity-factors Keff were anisotropic for （001） [ 100 ] and （110） [ 110 ] cracks. Keff of （010） [ 100 ] cracks that embedded in diamond did not change significantly during the increase of loading angle θ. Moreover, Keff. of （110） [ 110] cracks increased substantially during further increasing θ when 0 〉 60° ,which shows the different nature of the two cracks propagating in diamond.
同期刊论文项目
同项目期刊论文
Electronic structure and mechanical properties of osmium borides, carbides and nitrides from first p
Three-dimensional stress state around quarter-elliptical corner cracks in elastic plates subjected t
期刊信息
位置：