| 400MPa超级钢疲劳裂纹扩展速率 |
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| 引用本文： | 高彩茹,刘相华,杜林秀,贾坤宁. 400MPa超级钢疲劳裂纹扩展速率[J]. 东北大学学报(自然科学版), 2008, 29(11): 1568-1571. DOI: - |
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| 作者姓名： | 高彩茹 刘相华 杜林秀 贾坤宁 |
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| 作者单位： | 东北大学,轧制技术及连轧自动化国家重点实验室,辽宁,沈阳,110004 |
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| 基金项目： | 国家高技术研究发展计划(863计划) ， 辽宁省科技攻关项目 |
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| 摘 要： | 采用PLG-100高频疲劳试验机,在试验频率为80 Hz条件下,应用三点弯曲法对400 MPa超级钢板进行了裂纹扩展速率实验;绘制出ANS400裂纹扩展速率da/dN与应力强度因子幅ΔK之间的关系曲线;利用Origin7.0软件,采用线性拟合的方法得出Paris方程中的系数C=9.4×10-12mm/次,m=4.47.计算得出ANS400钢的裂纹扩展门槛值ΔKth为7.98 MPa.m1/2.
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| 关 键 词： | 超级钢 疲劳裂纹 扩展速率 应力强度因子幅 裂纹扩展门槛值 |
Crack Propagation Rate of 400 MPa Super-Steel Strip |
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| GAO Cai-ru,LIU Xiang-hua,DU Lin-xiu,JIA Kun-ning. Crack Propagation Rate of 400 MPa Super-Steel Strip[J]. Journal of Northeastern University(Natural Science), 2008, 29(11): 1568-1571. DOI: - |
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| Authors: | GAO Cai-ru LIU Xiang-hua DU Lin-xiu JIA Kun-ning |
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| Affiliation: | GAO Cai-ru,LIU Xiang-hua,DU Lin-xiu,JIA Kun-ning(State Key Laboratory of Rolling & Automation,Northeastern University,Shenyang 110004,China.) |
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| Abstract: | On the high-frequency fatigue tester PLG-100, the crack propagation rate of 400 MPa super-steel strip was tested at 80 Hz by three-point bending method. The relationship between the propagation rate da/dN and the amplitude of stress intensity factor was given. Then, with the software Origin 7.0 in combination with linear fitting, the coefficient C and m in Paris equation were determined as C=9.4 × 10-12 mm each time and 4.47respectively, and the threshold value of crack propagation ΔKth was 7.98 MPa·m1/2 through calculation. |
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| Keywords: | super-steel fatigue crack propagation rate stress intensity factor amplitude threshold value of crack propagation |
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