论文部分内容阅读
纤维强度分布的变动系数CV与金属基复合材料制造工艺、纤维及界面特性等直接相关。本文用微计算机模拟法研究了CV对长纤维增强金属基复合材料拉伸断裂行为的影响,针对某—B/A1复合材料所作模拟结果指出,当其他条件相同,CV≤5％时,材料断裂形式为非累积型;当CV≤15％时,断裂形式为累积型;而当CV值处于5％与15％之间时,表现为两种断裂的混合形式。纤维所能承受的平均应力值随着CV增大而单调减小。
The coefficient of variation (CV) of fiber strength distribution is directly related to the manufacturing process of metal matrix composites, fiber and interface properties. In this paper, the effect of CV on the tensile fracture behavior of long fiber reinforced metal matrix composites was studied by means of microcomputer simulation. According to the simulation results of a -B / A1 composite material, when other conditions are the same, the material fracture The form of non-cumulative type; when CV ≤ 15%, the fracture form is cumulative; and when the CV value is between 5% and 15%, the performance of the mixture of two forms of fracture. The average stress that fibers can withstand decreases monotonically with increasing CV.