A new life prediction method of temperature and load damage for high temperature components of engine is presented.In consideration of the interaction between thermo fatigue and creep,the new method includes the damage summation of elastic energy,plastic energy and creep energy of material.The precise finite element method of thermal elastic plastic creep conditions is used to solve the correlation of maltiple physical parameters of material (stress,strain,Young ′s modulus,thermal expansive coefficient,yield limit,plastic hardering exponent,creep hardering exponent,etc,) with temperature effect.In the new method the correction can be made according to the changes of temperature and time,so that it expands the applicable area of general damage mechanics.This paper makes reference to the experimental results of famous“Strain Range Partitioning (SRP)”and“Strain Energy Partitioning (SEP)”methods.The calculated results by the presented method locate between the experimental results of SRP and SEP methods.The new method has the advantages in clearness of physical concept,convenience of calculation and wide range for application.It is satifactory for engineering practice in life prediction of high temperature components.
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