本文利用微观力学方法研究了金属基复合材料的常温蠕变和应力松弛,连续纤维在弹性粘塑性基体内单向铺设。本文的结果与实验结果符合较好。研究表明,纤维在轴向对基体的蠕变起到明显阻止作用,而在横向和剪切变形下的作用较小。在低应力水平下,复合材料的蠕变变形很小,在高应力水平时,蠕变变形明显甚至引起蠕变破坏。 In this paper, the creep and stress relaxation of metal matrix composites at room temperature are studied by means of micro-mechanics. The continuous fibers are unidirectionally laid in the elastic viscoplastic matrix. The results in this paper are in good agreement with the experimental results. The results show that the fibers play a significant role in preventing the creep of the matrix in the axial direction and less in the transverse and shear deformation. At low stress levels, the composite creep deformation is very small, at high stress levels, creep deformation obviously even caused creep damage.