(1. 西安建筑科技大學 冶金工程學院，西安 710055；2. 南京理工大學 材料科學與工程學院，南京 210094)
摘 要: 基于復合材料的觀點建立納米/微米Cu細觀力學研究模型，采用有限元數(shù)值模擬技術對納米/微米Cu的力學性能進行數(shù)值模擬，分析納米/微米晶的分布、體積分數(shù)和形狀對納米/微米Cu強度和塑性的影響。結果表 明：與層狀分布相比，立方/球狀密封分布的納米/微米Cu強度和塑性均較大，其塑性隨微米晶增韌相體積分數(shù)的增大而增大，而屈服強度則逐漸降低；隨微米晶增韌相形狀因子(有效長徑比)的增大，納米/微米Cu的力學性能表現(xiàn)出明顯的各向異性。
關鍵字: Cu；細觀力學模型；韌化；有限元分析；數(shù)值模擬
nano-/micro-crystalline Cu
（1. School of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China;
2. School of Materials Science and Engineering, Nanjing University of Science and Technology,
Nanjing 210094, China）
Abstract:A micro-mechanical model of a nano-/micro-crystalline pure Cu was developed on the basis of the idea of composites. The mechanical properties were analyzed by finite element simulation. The effects of nano-/micro-crystalline distribution, volume fraction and shape on the tensile strength and ductility were investigated. The results indicate that, under uniaxial tensile loading, the tensile strength and ductility in cube or sphere geometry distribution are higher compared to the sandwich geometry distribution. With the increase of microcrystalline volume fraction of toughening phase, the ductility of the nano-/micro-crystalline pure Cu increases and the yield strength decreases. The strength and ductility of the nano-/micro-crystalline pure Cu have an obvious isotropy with the increase of the shape factor of microcrystalline toughening phase.
Key words: Cu; micro-mechanical model; toughening; finite element analysis; numerical simulation
