运用分子动力学方法,模拟原子尺寸下中心和边缘裂纹模型的裂纹扩展的微观机理以及温度对裂纹扩展的影响,以单晶铝作为研究对象,采用EMA势计算原子之间的相互作用.模拟结果表明,低温时边缘裂纹模型的屈服应力大于中心裂纹的屈服应力,随着温度的升高,中心裂纹的屈服应力大于边缘裂纹的屈服应力.
参考文献
| [1] | 宋海洋;孙贺明;白照印 等.加载速率和点缺陷对裂纹扩展影响的原子级模拟[J].云南大学学报(自然科学版),2005,27(5A):72-75. |
| [2] | 单德彬,袁林,郭斌.单晶铜弯曲裂纹萌生和扩展的分子动力学模拟[J].哈尔滨工业大学学报,2003(10):1183-1185. |
| [3] | 郭鹏;王雪青;郭宗标 等.单晶硅预制初裂纹扩展行为的分子动力学研究[J].动能材料,2007,4(38):612-615. |
| [4] | 王晓娟,朱宝全,王红梅.温度对单晶铝裂纹扩展影响的分子动力学模拟[J].系统仿真学报,2010(02):534-536. |
| [5] | Tian Tang;Sungho Kim;M.F. Horstemeyer .Fatigue crack growth in magnesium single crystals under cyclic loading: Molecular dynamics simulation[J].Computational Materials Science,2010(2):426-439. |
| [6] | 徐荣鹏,曾祥国,陈华燕,范镜泓.裂纹尖端位错发射与运动的分子动力学模拟[J].四川大学学报（自然科学版）,2011(03):612-616. |
| [7] | Mei, J.;Ni, Y.;Li, J. .The effect of crack orientation on fracture behavior of tantalum by multiscale simulation[J].International Journal of Solids and Structures,2011(21):3054-3062. |
| [8] | 曹莉霞,王崇愚.α-Fe裂纹的分子动力学研究[J].物理学报,2007(01):413-422. |
| [9] | 曾祥国,许书生,陈华燕.镁合金裂纹顶端塑性变形和失效机理的分子动力学模拟[J].四川大学学报（自然科学版）,2011(01):173-178. |
| [10] | Zhang Yongwei;Wang Tzuchiang;Tang Qiheng .MOLECULAR DYNAMICS SIMULATION OF CRACK-TIP PROCESSES IN COPPER[J].Acta Mechanica Sinica,1995(1):76-82. |
| [11] | Cao Ajing;Wei Yueguang .Atomistic simulations of crack necleation and integranular fracture in bulk nanocrystalline nickel[J].Physical Review B,2007,76(024113):1-5. |
| [12] | Kucherov L;Tadmor EB .Twin nucleation mechanisms at a crack tip in an hcp material: Molecular simulation[J].Acta materialia,2007(6):2065-2074. |
| [13] | Stukowski, A .Visualization and analysis of atomistic simulation data with OVITO-the Open Visualization Tool[J].Modelling and simulation in materials science and engineering,2010(1):015012:1-015012:7. |
| [14] | Sun DY;Mendelev MI;Becker CA;Kudin K;Haxhimali T;Asta M;Hoyt JJ;Karma A;Srolovitz DJ .Crystal-melt interfacial free energies in hcp metals: A molecular dynamics study of Mg[J].Physical review, B. Condensed matter and materials physics,2006(2):4116-1-4116-12-0. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%