Multi-axis low-cycle creep/fatigue life prediction of high-pressure turbine blades based on a new critical plane damage parameter. (December 2019)

• Record Type: Journal Article
• Authors: Huo, Junzhou; Sun, Debin; Wu, Hanyang; Wang, Weizheng; Xue, lin
• Is Part Of: Engineering failure analysis. Volume 106(2019)
• Publication Date: 2019-12
• Subjects: New critical plane damage parameter -- High-pressure turbine blades -- Creep/fatigue interaction -- Fatigue damage mechanism -- Life prediction; System failures (Engineering) -- Periodicals; Fracture mechanics -- Periodicals; Reliability (Engineering) -- Periodicals; Pannes -- Périodiques; Rupture, Mécanique de la -- Périodiques; Fiabilité -- Périodiques; Fracture mechanics; Reliability (Engineering); System failures (Engineering); Periodicals; Electronic journals; 620.112
• DOI: 10.1016/j.engfailanal.2019.104159
• Languages: English
• ISSNs: 1350-6307

Abstract

Abstract: To study the multi-axis low-cycle creep/fatigue life of high-pressure turbine blades, a multi-axis low-cycle fatigue life prediction model based on a new critical plane damage parameter is proposed in this paper. Firstly, based on the thermal-structural coupling analysis of high-pressure turbine blades, the law of stress-strain distribution under the complex load of centrifugal load, temperature load and the aerodynamic load is obtained. Secondly, the multi-axis low-cycle fatigue life prediction model and the L-M equation are applied to predict the fatigue life and creep life of blade respectively. Furthermore, different experimental loading schemes are used to study the fatigue damage mechanism for the creep/fatigue interaction under high temperature condition, and a creep/fatigue interaction life prediction model is simultaneously provided. And finally, the experiment results demonstrate the rationality of the multi-axis low-cycle fatigue life prediction model and the creep/fatigue interaction should not be ignored. Highlights: A multi-axis low-cycle fatigue life prediction model based on a new critical plane damage parameter is proposed. The effects of main cycle and secondary cycle on multi-axis low cycle fatigue life are considered simultaneously. A creep/fatigue interaction life prediction model is provided and calculate the creep/fatigue interaction life of the blade.