通过对长纤维增强的金属基复合材料纤维脱落后复合材料应力场的分析得到了应力分布的精确解,讨论了循环热/机械载荷对复合材料应力场的影响,并针对Al基Be纤维增强的复合材料中外载荷对纤维与基体间的脱落长度的影响做了定性分析,认为当外载荷与材料参数不发生变化时,纤维与基体将不会产生继续脱落,进而破坏形式将会发生变化,在整个分析过程中纤维作为弹性体,纤维与基体界面的塑性变形采用了理想弹塑性模型.得到结论为以后继续研究金属基复合材料的疲劳特性奠定了基础.

By studying the influence of the debonding fibers in composites under cyclical thermo mechanical load the distributions of fibers and matrixes stress are given around the debonding fiber. For illustrating the Boron/Al, continuous fiber composite is examined. Matrix around the debonding fiber only sustains shear stress. The constitution relationship of matrix is perfect elastical-plastical. The important conclusion is made, which lays a foundation for continuing studying the fatigue of composites.

TB331