| AP1000主管道冷弯壁厚减薄 |
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| 引用本文： | 王鹏,杨滨,王胜龙,赵天明.AP1000主管道冷弯壁厚减薄[J].北京科技大学学报,2016(8):1160-1167. |
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| 作者姓名： | 王鹏 杨滨 王胜龙 赵天明 |
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| 作者单位： | 1. 北京科技大学新金属材料国家重点实验室,北京,100083;2. 北京科技大学新金属材料国家重点实验室，北京100083; 北京科技大学钢铁共性技术协同创新中心，北京100083;3. 烟台台海玛努尔核电设备股份有限公司,烟台,264002 |
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| 基金项目： | 国家高技术研究发展计划资助项目(2012AA03A507) |
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| 摘 要： | 提出了一种改进的Johnson-Cook模型,用于室温和低应变速率下AP1000核电站主管道316LN奥氏体不锈钢的塑性变形过程研究。借助有限元软件ANSYS/LS-DYNA,对AP1000核电一回路主管道热段管冷弯成形过程进行模拟仿真,分析管道壁厚、相对弯曲半径、摩擦系数等工艺参数对壁厚减薄率的影响规律,拟合出壁厚减薄率的经验公式。全尺寸主管道冷弯试验结果表明,数值模拟结果准确可靠。
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| 关 键 词： | 压水堆 管道 滚轧成形 壁厚减薄 本构方程 |
Wall-thickness reduction of AP1000 primary coolant pipes subjected to cold roll-forming |
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| WANG Peng,YANG Bin,WANG Sheng-long,ZHAO Tian-ming.Wall-thickness reduction of AP1000 primary coolant pipes subjected to cold roll-forming[J].Journal of University of Science and Technology Beijing,2016(8):1160-1167. |
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| Authors: | WANG Peng YANG Bin WANG Sheng-long ZHAO Tian-ming |
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| Abstract: | A modified Johnson-Cook model was proposed based on the true stress-strain data of 316LN stainless steel and it was successfully used to describe the deformation characteristic of the steel at room temperature and low strain rate. By making use of the finite element software ANSYS/LS-DYNA, a numerical simulation of cold roll-forming was performed for AP1000 primary pipes. The influence laws of forming parameters on wall-thickness reduction, such as wall-thickness, relative bending radius and friction, were investigated. An empirical formula of wall-thickness reduction for AP1000 primary pipes was proposed by the numerical simulation method. Furthermore, a full-scale cold-bending experiment of AP1000 primary coolant pipes was carried out for verification, and it indicates that the simulated result is accurate and reliable. |
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| Keywords: | pressurized water reactors pipelines roll forming wall-thickness reduction constitutive equations |
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