Based on the discovery, a power function model for the creep rupture life prediction is presented and the derivative least square method is adopted to determine the unknown parameters in the model.
由此建立蠕变持久寿命幂函数预测模型,并采用导数最小二乘法确定模型中的待定参数。
The methods of creep test to get both curves of tensile creep rupture load vs time and creep strain vs time are compared. The procedures to extrapolate the two types of creep curves are presented.
The Z-parameter method can characterize the reliability evaluation of creep rupture life.
利用Z参数方法实现了持久寿命的可靠性评估。
The P92 steel is a steel sort being used for main steam pipelines of ultra-supercritical units at present, its creep rupture life has widely drawn close attention.
P 92钢是目前超超临界机组主蒸汽管道的应用钢种,其蠕变断裂寿命被广泛关注。
The carburizing damage of HP type ethane cracking tubes after 40000hours of service is analysed using metallographic methods, and the tensile and creep rupture tests are conducted.