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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．
The cyclic behavior of copper under non-proportional cyclic loading was experimentally studied. The biaxial non-proportional cyclic loading tests of round and diamond strain paths were carried out. Four kinds of cyclic ratcheting tests with non-proportional circulation paths with average stress were carried out. Experimental studies have shown that the evolution of the plastic strain rate direction and the plastic modulus of the copper strongly depends on the strain path shape and the equivalent strain amplitude. The non-proportional cycle ratcheting behavior of copper also depends significantly on the loading path shape, amplitude, average stress And its history.