摘要
对紫铜在非比例循环加载下的循环行为进行了实验研究．开展了圆形和菱形应变路径的双轴非比例循环加载试验；并进行了4种具有平均应力的非比例循环路径的循环棘轮试验．实验研究表明，紫铜的塑性应变率方向和塑性模量的演化强烈地依赖于应变路径形状和等效应变幅值；紫铜的非比例循环棘轮行为也明显依赖于加载路径形状、幅值、平均应力及其历史．
An experimental study was carried out on the cyclic properties of pure coppersubject to nonproportional cyclic loading.The biaxial nonproportional cyclic strap testsfor circular and rhombic strain paths, and the cyclic cachetting tests for four nonpmportinnalcyclic paths with mean stresses were conducted. The operiment shows that the evolutionsof plastic strain rate direction and plastic modulus depend strongly on the shape aam equivaleatstrain amplitude of the strain path, and the nonproportional cyclic rstchetting behaviour dependssiedcatly on the shape and the amplitude, the mean stress and the mean stress history ofloading path.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1998年第10期1055-1060,共6页
Acta Metallurgica Sinica
基金
国家自然科学基金!19772041
四川省跨世纪青年学科带头人培养基金
关键词
棘轮
循环塑性
紫铜
应变
应力
ratchetting, cyclic plasticity, pure copper, strain, stress
