Fatigue of metals is an energy dissipation process. The main energy dissipation includes the internal friction and the stored energy.
金属疲劳是一个能量耗散过程，其中主要的能量耗散形式包括内耗热和储能。
Following a detailed mathematical derivation a new approximate algorithm for the fatigue fracture of metals is given namely a complicate integral having a changing upper limit.
在详细的数学推导之后，给出了金属疲劳断裂几率即一个变上限复杂积分的近似解析函数表达式，并与计算机的数值曲线进行了比较。
Equipment life-span diagnoses mainly research the variation rules of unit part in unsteady temperature and thermal stress, fatigue characteristic of metals and life deterioration of equipments.
设备寿命诊断主要研究设备部件在非稳态下的温度及热应力变化规律、金属材料的疲劳特性以及部件的寿命损耗。
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