Abstract Due to superior corrosion and rust resistance performance, copper alloy aquaculture netting structures are popular in the aquaculture industry. However, due to initial defects such as creases and corners caused by copper alloy weaving, the fatigue performance of copper alloy netting is greatly affected under periodic loads. This paper presents original test results for fatigue strength and ageing performance of copper alloy wire and netting structures. Compared with the fatigue test results of steel and aluminum materials, the fatigue strength of the actual copper alloy netting structure is relatively low with the fatigue ratio σ f / σ b = 0.06 at 10 6 cycles. The fatigue ratio is only about (1/8–1/4) of that of other metals ( σ f / σ b =(0.4–0.5) for steel and σ f / σ b =(0.25–0.50) for magnesium alloy). Considering the corrosive environment and ageing effects, metallographic structure and the maximum corrosion depths of copper alloy wire under different ageing conditions were measured and compared systematically. After a series of tests on aging and fatigue, it is concluded that the copper alloy material shows better corrosion resistance and aging resistance in seawater immersion environment than the traditional steel alloy or polymer netting. In seawater environment, the fatigue life of copper alloy netting decreases by only 10%, while the fatigue reduction rate of steel material is about 30% and nylon material is about 80%. The experimental results can provide a reference for the anti-fatigue design of copper alloy netting structure.

中文翻译：

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实验方法对铜合金网状结构疲劳强度的工程预测

摘要 铜合金水产养殖网结构由于具有优越的防腐、防锈性能，在水产养殖业中广受欢迎。但是，由于铜合金编织引起的折痕、拐角等初始缺陷，在周期性载荷作用下，铜合金网的疲劳性能受到很大影响。本文介绍了铜合金丝网结构疲劳强度和老化性能的原始测试结果。与钢和铝材料的疲劳试验结果相比，实际铜合金网状结构的疲劳强度较低，10 6 次循环时疲劳比σ f / σ b = 0.06。疲劳比仅为其他金属的（1/8–1/4）左右（钢的σ f / σ b =（0.4-0.5）和镁合金的σ f / σ b =（0.25-0.50）） . 综合考虑腐蚀环境和时效效应，对铜合金线在不同时效条件下的金相组织和最大腐蚀深度进行了系统测量和比较。经过一系列的老化和疲劳试验，得出结论，铜合金材料在海水浸泡环境中表现出比传统钢合金或聚合物网更好的耐腐蚀性和耐老化性。在海水环境下，铜合金网的疲劳寿命仅降低10%，而钢材料的疲劳降低率约为30%，尼龙材料的疲劳降低率约为80%。实验结果可为铜合金网状结构抗疲劳设计提供参考。对不同时效条件下铜合金线材的金相组织和最大腐蚀深度进行了系统测量和比较。经过一系列的老化和疲劳试验，得出结论，铜合金材料在海水浸泡环境中表现出比传统钢合金或聚合物网更好的耐腐蚀性和耐老化性。在海水环境下，铜合金网的疲劳寿命仅降低10%，而钢材料的疲劳降低率约为30%，尼龙材料的疲劳降低率约为80%。实验结果可为铜合金网状结构抗疲劳设计提供参考。对不同时效条件下铜合金线材的金相组织和最大腐蚀深度进行了系统测量和比较。经过一系列的老化和疲劳试验，得出结论，铜合金材料在海水浸泡环境中表现出比传统钢合金或聚合物网更好的耐腐蚀性和耐老化性。在海水环境下，铜合金网的疲劳寿命仅降低10%，而钢材料的疲劳降低率约为30%，尼龙材料的疲劳降低率约为80%。实验结果可为铜合金网状结构抗疲劳设计提供参考。得出的结论是，铜合金材料在海水浸泡环境中表现出比传统钢合金或聚合物网更好的耐腐蚀性和耐老化性。在海水环境下，铜合金网的疲劳寿命仅降低10%，而钢材料的疲劳降低率约为30%，尼龙材料的疲劳降低率约为80%。实验结果可为铜合金网状结构抗疲劳设计提供参考。得出的结论是，铜合金材料在海水浸泡环境中表现出比传统钢合金或聚合物网更好的耐腐蚀性和耐老化性。在海水环境下，铜合金网的疲劳寿命仅降低10%，而钢材料的疲劳降低率约为30%，尼龙材料的疲劳降低率约为80%。实验结果可为铜合金网状结构抗疲劳设计提供参考。