在疲劳锻炼学科中，常常引入概率的概念，通过极大似然法预测寿命-maximum likelihood method

本程序为扩展有限元程序，可以模拟裂纹扩展过程，如果内置裂纹开裂速率，可以进行试件疲劳寿命预测。(This program is an extended finite element program, which can simulate the crack propagation process and predict the fatigue life of specimens if the crack rate is in place.)

复合材料疲劳寿命预测umat程序，用Fortran语言编写，在ABAQUS中应用(Composite fatigue life prediction UMAT program, written in Fortran language, and applied in ABAQUS)