关键词: 复合材料, 等效均匀体, 初始屈服

Abstract: Based on the equivalent homogeneous model, (, Contiaued on P.23) Continued Jrom p.44) the macro-initial-yielding of hollow microsphere filled composites is analyzed by the theoretlcal and FEM methods. The macro-initial-yielding function suggested includes the physical properties and geometric factors of the components and gives a theoretical explanation to the phenomenon that the plastic behavior of the composite is sensitive to its average stress. The comparison between the numerical calculation and experimental results shows that the theoretical analysis is reliable enough.

Key words: composite, equivalent homogeneous medium, macro-initial-yielding