高温拉扭比例与非比例加载下循环特性研究.pdf

文档介绍：Journal of Mechanical Strength 机械强度 2004 ,26(S) :028~031
高温拉扭比例与非比例加载下循环特性研究 X
TENSION2TORSION CYCLIC CHARACTERISTICS UNDER PROPORTIONAL AND
NON2PROPORTIONAL LOADING AT HIGH TEMPERATURE
尚德广XX 蔡能陈建华孙国芹
(北京工业大学机电学院,北京 100022)
王建国王连庆王红缨唐俊武
(北京科技大学新金属材料国家重点实验室,北京 100083)
SHAN G De Guang CAI Neng CHEN JianHua SUN GuoQin
( College of Mechanical Engineering and Applied Electronics Technology , Beijing University of
Technology , Beijing 100022 , China)
WAN G Jian Guo WAN G LianQing WAN G HongYing TAN G J unWu
( State Key Laboratory for Advanced Metals and Materials , University of Science and Technology
Beijing , Beijing 100083 , China)
摘要针对拉扭薄壁管疲劳试样, 在控制应变拉扭循环加载下对高温合金材料 GH4169 的循环特性进行试验研究。
分别测试和研究比例与非比例拉扭加载下拉与扭的应力响应值随循环数的变化关系。研究结果表明,低周拉扭疲劳加
载下,拉与扭应力响应的硬化与软化特性取决于应变加载路径和加载参数。
关键词多轴低周疲劳循环硬化与软化比例加载非比例加载高温
中图分类号 O346. 23
Abstract The multiaxial cyclic characteristic of GH4169 was investigated for the thin tubular multiaxial fatigue specimen under
proportional and non2proportional loading at high temperature. The relationship between the cyclic stress response of tension and torsion
and the cycle number were measured and studied subjected to proportional and non2proportional loadings. The results showed that the
characteristics of cyclic hardening or softening depend to the strain loading paths and the loading parameters.
Key words Multiaxial lo