高温拉扭比例与非比例加载下循环特性研究  

TENSION-TORSION CYCLIC CHARACTERISTICS UNDER PROPORTIONAL AND NON-PROPORTIONAL LOADING AT HIGH TEMPERATURE

作　　者：尚德广[1] 蔡能[1] 陈建华[1] 孙国芹[1] 王建国[2] 王连庆[2] 王红缨[2] 唐俊武[2] 

机构地区：[1]北京工业大学机电学院,北京100022 [2]北京科技大学新金属材料国家重点实验室,北京100083

出　　处：《机械强度》2004年第z1期28-31,共4页Journal of Mechanical Strength

基　　金：国家自然科学基金资助项目 (1 0 1 72 0 1 0 ) ;北京市教委科技发展计划项目~~

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 。The multiaxial cyclic characteristic of GH4169 was investigated for the thin tubular multiaxial fatigue specimen under proportional and non-proportional 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 non-proportional loadings. The results showed that the characteristics of cyclic hardening or softening depend to the strain loading paths and the loading parameters.

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 

分 类 号：O346.23[理学—固体力学]