...Debin Sun; Zhenhua Wan In response to the problem of creep-fatigue interaction damage failure of aero-engine turbine blade material, based on the modified damage evolution model of Kachanov-Rabotnov and Chaboche, a creep-fatigue life prediction model for nickel-based superalloy DZ125 is constructed...

... capable of generating such a bending-torsional loading was developed. Creep-fatigue tests were conducted on P91 steel piping with weldment. The results clarified that the creep-fatigue life was reduced by the superposition of the torsional and bending moments and that it was further reduced by a holding...

...Manu Puliyaneth; Haofeng Chen Creep–fatigue and creep–ratcheting life assessment of an SS304 weldolet considering full creep–cyclic plasticity interaction is investigated using the extended direct steady cycle analysis within the linear matching method framework. The creep behavior is modeled using...

...Xiao-Cheng Zhang; Jian-Guo Gong; Fu-Hai Gao; Fu-Zhen Xuan In this work, improved creep-fatigue life prediction models based on time fraction (TF) and ductility exhaustion (DE) rule are established for creep-fatigue life prediction of components at elevated temperatures. Cyclic softening/hardening...

... on the structural strength of the notched components at elevated temperatures under creep, fatigue, and creep-fatigue loading conditions. Experimental phenomena (i.e., strengthening or weakening effects) for typical notched specimens subjected to the above three loading conditions are summarized, and the related...

...Hyeong-Yeon Lee; Jong-Bum Kim; Hong-Yune Park High temperature design and evaluation of creep-fatigue damage for sodium-to-sodium heat exchanger, decay heat exchanger (DHX), in a sodium test loop have been conducted. The DHX is a shell- and tube-type heat exchanger with an outer diameter of 21.7 mm...

... temperature up to 950 ° C . An evaluation of creep-fatigue damage, for a prototype PHE, has been carried out from finite element analysis with the full three dimensional model of the PHE. The inlet temperature in the primary side of the PHE was 950 ° C with an internal pressure of 7 MPa, while the inlet...

...Hyeong-Yeon Lee; Kee-Nam Song; Yong-Wan Kim Evaluation of creep-fatigue damage has been carried out for the hot gas duct (HGD) structure in the nuclear hydrogen development and demonstration (NHDD) plant. The core outlet and inlet temperature of the NHDD plant are 950 ° C and 490 ° C , respectively...

... computing planning reliability rotors steam turbines Visual BASIC creep-fatigue low cycle fatigue damage steam turbine rotor Most of steam turbines installed on electric power plants were designed and manufactured to operate during 20 or 25 years; that is equal to 160.000 or 200.000...

...Takashi Ogata High temperature components in thermal power plants are subjected to creep-fatigue loading where creep cavities initiate and grow on grain boundaries. Development of a quantitative evaluation method of cavity growth is important for reliable maintenance of these components...