摘要
对塑料齿轮疲劳破坏过程作了讨论和分析，提出了疲劳裂纹的萌生与扩展的银纹模式，认为轮齿表面节点附近热拉伸内应力是导致银纹形成的重要原因。
The fatigue facilure procedure of plasticgear teeth is discussed in the paper, and thecraze model to explain the initiation andpropagation of the fatigue crack is also es-tablished. The authors believe that the in-ner hot tensile stress in the surface layernear the pitch point in engagement zone is
关键词
塑料齿轮
疲劳破
齿轮
裂纹
plastic gears, fatigue facilure,mechanism , craze
