Abstract: Based on the theory of thermo-elastic-plastic creep, and considered the material properties changed with temperature, the incremental original equations of thermo-elastic-plastic creep, and the calculation formulas of axisymmetric finite element method are presented. The stress-strain of the boiler pipe with elevated temperature is analysed and the calculation results may be refered by engineering design department.

Key words: Creep, Finite element method, Thermo-elastic-plasticity