CHARACTERIZATION OF THERMO-MECHANICAL FATIGUE PROPERTIES FOR PARTICULATE REINFORCED COMPOSITES  

作　　者：H.J.Shi H.X.Mei R.Guo G.Mesmacque 

机构地区：[1]Key Lab. of Failure Mechanics, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China,Key Lab. of Failure Mechanics, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China,Kunming University of Science and Technology, Kunming 650093, China,Lab. of Mechanics of Lille, University of Lille 1, Villeneuve d'Ascq, 59500 France

出　　处：《Acta Metallurgica Sinica(English Letters)》2004年第4期534-541,共8页金属学报（英文版）

基　　金：support by the Special Funds for the State Basu Research Project of China(G19990650);the France-Chma Advance Research Program(MX-01-03);the National Natural Science Foundation of China(No.50371042)

摘　　要：A Voronoi cell dement, formulated with creep, thermal and plastic strain was applied for investigation of thermo-mechanical fatigue behavior for particulate reinforced composites. Under the in-phase fatigue loading, the maximum of tensile deformation at the maximum given loading are larger than that at the same maximum under the out-phase fatigue. The stiffness decreases nonlinearly with the increasing of the phase angle, which results in increasing of the area of fatigue loop curve and the decrease in fatigue life. The spatially centralizing of inclusions results in decreasing of the plastic strain amplitude and the area of fatigue loop curve, which will also reduce the consumption of single-circle plastic strain energy and prolong the fatigue life.A Voronoi cell dement, formulated with creep, thermal and plastic strain was applied for investigation of thermo-mechanical fatigue behavior for particulate reinforced composites. Under the in-phase fatigue loading, the maximum of tensile deformation at the maximum given loading are larger than that at the same maximum under the out-phase fatigue. The stiffness decreases nonlinearly with the increasing of the phase angle, which results in increasing of the area of fatigue loop curve and the decrease in fatigue life. The spatially centralizing of inclusions results in decreasing of the plastic strain amplitude and the area of fatigue loop curve, which will also reduce the consumption of single-circle plastic strain energy and prolong the fatigue life.

关 键 词：thermo-mechanical fatigue particulate reinforced composites voronoi element phase angle 

分 类 号：TB33[一般工业技术—材料科学与工程]