Using some theories of material fatigue destruction, it discusses the strength decline in fatigue-strength fuzzy reliability designfor machine parts, gives a calculating model and an example.

• 以模糊数学为基础,应用材料疲劳损伤累积理论,讨论机械零件疲劳强度模糊可靠性设计中的强度衰减问题,并给出了估算公式,进行了实例计算。