摘要
High speed, high resolution infrared thermography, as a non contact, full field, and nondestructive technique, was used to study the temperature variations of a cobalt based ULTIMET alloy subjected to cyclic fatigue. During each fatigue cycle, the temperature oscillations, which were due to the thermal elastic plastic effects, were observed and related to stress-strain analyses. The change of temperature during fatigue was utilized to reveal the accumulation of fatigue damage. A constitutive model was developed for predicting the thermal and mechanical responses of ULTIMET alloy subjected to cyclic deformation. The model was constructed in light of internal state variables, which were developed to characterize the inelastic strain of the material during cyclic loading. The predicted stress-strain and temperature responses were found to be in good agreement with the experimental results.
High-speed, high-resolution infrared thermography, as a non-contact,full-field, and nondestructive technique, was used to study the temperature variations of acobalt-based ULTIMET alloy subjected to cyclic fatigue. During each fatigue cycle, the temperatureoscillations, which were due to the thermal-elastic-plastic effects, were observed and related tostress--strain analyses. The change of temperature during fatigue was utilized to reveal theaccumulation of fatigue damage. A constitutive model was developed for predicting the thermal andmechanical responses of ULTIMET alloy subjected to cyclic deformation. The model was constructed inlight of internal-state variables, which were developed to characterize the inelastic strain of thematerial during cyclic loading. The predicted stress--strain and temperature responses were found tobe in good agreement with the experimental results.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2002年第4期734-747,共14页
Transactions of Nonferrous Metals Society of China
