停留时间
微观结构
材料科学
蠕动
线性关系
结构工程
冶金
复合材料
数学
工程类
统计
医学
临床心理学
作者
Yutaro Ota,Keiji Kubushiro,Yasuhiro Yamazaki
摘要
Abstract Low cycle fatigue (LCF) life at ambient temperature of Ti alloys is well known to decrease with stress dwell. This phenomenon, called cold dwell fatigue (CDF), is influenced by the peak stress, dwell time, and microstructure. For this study, the CDF life was evaluated by the linear cumulative damage rule. The influence of test conditions and microstructure on the linear cumulative damage rule was also verified. By the linear cumulative damage rule, when creep damage is calculated using the time exhaustion rule, theCDF damage was evaluated by the inequality of D Total = ( D F , D C ) ≤ (0.01, 10 −6 ). However, the CDF damage can be evaluated in the range of D Total = 0.6–1.2 when creep damage was calculated using the ductile exhaustion rule. Results indicate that the evaluation was almost independent of the dwell time, peak stress, and microstructure, so it is also a versatile method for evaluating CDF responses.
科研通智能强力驱动
Strongly Powered by AbleSci AI