| 22NiMoCr3-7钢韧-脆转变区断裂韧度及断裂失效曲线 |
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| 引用本文： | 王钟羡,吴春笃.22NiMoCr3-7钢韧-脆转变区断裂韧度及断裂失效曲线[J].核动力工程,2009,30(2). |
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| 作者姓名： | 王钟羡 吴春笃 |
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| 作者单位： | 江苏大学,江苏镇江,212013;江苏大学,江苏镇江,212013 |
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| 摘 要： | 采用ABAQUS有限元分析软件对22NiMoCr3-7压力容器钢单边裂纹三点弯曲试件进行弹塑性数值计算.分析了在不同温度的解理断裂载荷水平下,韧-脆转变温度区标准裂纹和浅裂纹试件裂纹尖端区域的应力场.用J-A2双参数理论,评估标准裂纹和浅裂纹试件裂纹尖端的约束效应,计算了与主曲线参考温度T0相应的约束参数A2值.根据双参数断裂理论和RKR断裂准则,给出了22NiMoCr3-7压力容器钢在不同温度时与约束相关的断裂失效曲线.结果表明,断裂失效预测曲线与实验结果基本一致.
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| 关 键 词： | 22NiMoCr3-7钢 裂纹 断裂韧度 断裂约束 韧-脆转变区 断裂失效曲线 |
Fracture Toughness and Failure Curve of 22NiMoCr3-7 Steel in Ductile-Brittle Transition Range |
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| WANG Zhong-xian,WU Chun-du.Fracture Toughness and Failure Curve of 22NiMoCr3-7 Steel in Ductile-Brittle Transition Range[J].Nuclear Power Engineering,2009,30(2). |
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| Authors: | WANG Zhong-xian WU Chun-du |
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| Affiliation: | Jiangsu University;Zhenjiang;Jiangsu;212013;China |
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| Abstract: | The numerical elastic-plastic analyses were processed by using FEA to three-point bend sam-ples in the ductile-brittle transition range.The samples are made of 22NiMoCr3-7 pressure vessel steel with single edge crack.Stress fields and constraint effects of the standard crack sample and the sallow crack sam-ple was assessed by using J-A2 fracture theory.And the constraint parameters A2 relating to the master curve reference temperatures T0 were obtained.Based on J-A2 approach and RKR fracture model,a formula... |
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| Keywords: | 22NiMoCr3-7 steel Crack Fracture toughness Fracture constraint Ductile-brittle transition range Fracture failure curve |
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