| 柔度法研究镍铬合金焊材的高温疲劳裂纹扩展行为 |
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| 引用本文： | 包陈,蔡力勋,陈燕.柔度法研究镍铬合金焊材的高温疲劳裂纹扩展行为[J].固体力学学报,2010,31(1):8-15. |
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| 作者姓名： | 包陈 蔡力勋 陈燕 |
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| 作者单位： | 1. 西南交通大学力学与工程学院2. 哈尔滨焊接研究所 |
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| 摘 要： | 金属材料的高温疲劳裂纹扩展速率试验,关键问题在于高温环境下精确测量试样的裂纹长度.基于柔度测试技术,通过改进现有高温应变引伸计实现了FFCT试样的高温疲劳裂纹扩展速率测试.利用有限元方法对具有分层构形CT试样的柔度方法进行了研究,获得了分层结构CT试样的等效弹性模量表达式,通过迭代方法对实时裂纹长度进行修正,获得了良好的预测精度.完成了镍铬合金焊带、焊条和焊丝三种焊材常温和350℃下的疲劳裂纹扩展速率试验,获得了相应的疲劳裂纹扩展规律.
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| 关 键 词： | 高温柔度法 疲劳裂纹扩展 镍铬合金 焊带 焊条 焊丝 |
| 收稿时间： | 2008-11-03 |
ESTIMATION OF FATIGUE CRACK GROWTH RATES FOR NICKEL-CHROMIUM ALLOY WELDING MATERIALS AT HIGH TEMPERATURE USING THE COMPLIANCE METHOD |
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| Chen Bao,Lixun Cai,Yan Chen.ESTIMATION OF FATIGUE CRACK GROWTH RATES FOR NICKEL-CHROMIUM ALLOY WELDING MATERIALS AT HIGH TEMPERATURE USING THE COMPLIANCE METHOD[J].Acta Mechnica Solida Sinica,2010,31(1):8-15. |
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| Authors: | Chen Bao Lixun Cai Yan Chen |
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| Institution: | 1School of Mechanics and Engineering;Southwest Jiaotong University;Chengdu;610031;2Harbin Welding Institute;Harbin;150080 |
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| Abstract: | The key issue of fatigue crack growth rate testing for metallic materials at high temperature is to measure the on-line crack length of fracture specimen accurately.By improving the existing high-temperature strain extensometer,the fatigue crack growth rate testing for a FFCT(Front force compact tensile) specimen at high temperature was carried out using the compliance method.The compliance method for a CT(compact tensile) specimen which contains two different materials was analyzed using the finite element... |
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| Keywords: | high temperature compliance method fatigue crack growth nickel-chromium alloy welding strip welding rod welding wire |
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