【摘 要】
：
Impurity agglomeration has a significant influence on shock response of metal materials.In this paper,the mechanism of Ti-clusters in metal Al under shock loadi
【机 构】
：
School of Mechatronic Engineering,Beijing Institute of Technology,Beijing 100081,China;System Engine
论文部分内容阅读
Impurity agglomeration has a significant influence on shock response of metal materials.In this paper,the mechanism of Ti-clusters in metal Al under shock loading is investigated by non-equilibrium molecular dynamics simulations.Our results show that the Ti-cluster has obvious effects on the dislocation initiation and melting of bulk Al.First,the Ti clusters induces the strain concentrate and leads the dislocations to be initiated from the interface of Ti cluster.Second,dislocation distribution from the Ti-cluster model results in a formation of a grid-like structure,while the dislocation density is reduced compared with that from the perfect Al model.Third,the critical shock velocity of dislocation from the Ti-cluster model is lower than from perfect A1 model.Furthermore,it is also found that the temperature near the interface of Ti-cluster is 100 K-150 K higher than in the other areas,which means that Ti-cluster interface melts earlier than the bulk area.
其他文献
职业教育法施行二十多年，迎来首次大修，具有重大意义。职业教育前途广阔、大有可为，法律修订符合社会经济和市场发展趋势，符合教育发展趋势，是大势所趋、人心所向。北京师范大学国家职业教育研究院召开会议，为推进职业教育法修订献计献策。 关键词 职业教育法 现代职业教育体系 产教融合 学分银行 6月7日，《中华人民共和国职业教育法（修订草案）》提请十三届全国人大常委会第二十九次会议审议，并面向社会征求意
课程思政建设是落实立德树人根本任务的战略举措,其核心是要把思想政治工作贯穿于人才培养体系中,发挥好每门课程的育人作用,提高高校的人才培养质量.
国家主任播音员、“中华经典诵读网络专项培训”项目辅导教师朱月认为：“经典诵读对于弘扬民族文化、凝聚民族精神和培养青少年的爱国情怀都具有十分重要的意义。培训项目的学员都是教师，他们对于学生认知经典、了解国学起着重要的引导作用。做好培训项目，是我们对传承、弘扬中华经典文化做出的最好回答。” 关键词 经典诵读 文化自信 脱贫攻坚 推广普通话 诵读经典，引领学生体悟积淀五千年的中华文化。国家主任播音员
Localized surface plasmon has been extensively studied and used for the photocatalysis of various chemical reactions.However,the different contributions between
We study the topological properties of the one-dimensional non-Hermitian Kitaev model with complex either periodic or quasiperiodic potentials.We obtain the ene
State-to-state time-dependent quantum dynamics calculations have been carried out to study H + DH'→ HH'+D/HD + H'reactions on BKMP2 surface.The total integral
The heredity of clusters in rapidly cooled (Zrs0Cu50)100-xAlx melts and its correlation with glass-forming ability(GFA) are studied via molecular dynamics simul
Electron-electron correlation plays an important role in the underlying dynamics in physics and chemistry.Helium is the simplest and most fundamental two-electr
We propose a novel energy dissipative method for the Allen-Cahn equation on nonuniform grids.For spatial dis-cretization,the classical central difference method
Superconducting transition edge sensor (TES) bolometers require superconducting films to have controllable transi-tion temperatures Tc in different practical ap