原位Mg_2Si颗粒分布对镁基体应力场影响的模拟  

Simulation of Effects of In-situ Mg_2Si Particles Distribution on Stress Field Distribution in Magnesium Matrix

作　　者：卢翔[1] 尧军平[1] 孙众[1] 

机构地区：[1]南昌航空大学航空制造工程学院

出　　处：《特种铸造及有色合金》2015年第1期77-80,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51164027);江西省教育厅科技项目(GJJ14502)

摘　　要：利用ANSYS软件模拟原位Mg2Si增强颗粒在均匀分布和随机分布条件下对镁基体应力场的影响。结果表明,当颗粒间距较小,且小于有效干涉距离时,颗粒间干涉作用会导致相近颗粒间产生应力集中。颗粒间的角度也能直接影响颗粒间相互作用。当颗粒间距小于有效干涉距离,且颗粒间的中心连线与载荷方向平行时,会产生最大应力集中值。相同条件下,原位Mg2Si颗粒均匀分布时的力学性能优于随机分布方式。Influence of Mg2 Si particles in form of uniform and random distribution mode on stress field in magnesium matrix was simulated by ANSYS software.The simulated results show that with a smaller particle distance and even less than effective interference distance,interference effects among the particles will take stress concentration among neighbor particles.Angle among the particles can directly affect the interaction among particles.When the particles spacing is less than the effective interference with central connection between the particles parallel to load direction,maximum stress concentration can be observed.At the same conditions,the mechanical properties of in situ Mg2 Si particles with uniform distribution is superior to those of ones with random distribution.

关 键 词：原位Mg2Si颗粒 分布方式 应力场 有限元分析 

分 类 号：TB333[一般工业技术—材料科学与工程]