通过轴向循环拉压实验获得漏斗试样载荷-位移（P-V）曲线，并基于该曲线和有限元反演分析方法获得了材料的循环本构关系。利用该循环本构关系对漏斗试样进行三维扭转有限元分析，获得漏斗根部剪切应力与扭矩之间的转换公式，及漏斗根部剪切应变与名义扭角之间的转换公式，实现了漏斗试样扭转低周疲劳的研究。应用该方法，完成了 C250钢漏斗试样常温下一条曲线的扭转低周疲劳实验，揭示了 C250钢的疲劳行为，并给出了该材料的 Manson-Coffin 寿命预测模型。
Load-displacement (P-V)curve has been obtained of funnel specimen based on cyclic uniaxial tension and compression ex-periment,Based on the test results and finite element analysis iterative method,the effective cyclic constitutive relationships of C250 steel have been obtained.By using these effective cyclic constitutive relationships,3D finite element analyses of funnel specimen under torsion are used to reveal the transforming relationship between the torque and the shear stress at the root of funnel specimen,the rela-tionship between the nominal torsional angle and the shear strain at the root of funnel specimen.On the basis of those analyzing meth-od,the low cycle fatigue study under torsion has been achieved.A series of torsional fatigue tests on C250 steel at room temperature by using funnel specimens have been carried out,the low cycle fatigue behavior of C250 steel has been revealed,and the typical Manson-Coffin model is employed to predict the torsional fatigue life of C250 steel.
参考文献
| [1] | P. Davoli;A. Bernasconi;M. Filippini .Independence of the torsional fatigue limit upon a mean shear stress[J].International Journal of Fatigue,2003(6):471-480. |
| [2] | 包陈;蔡力勋;钟斌 .两种合金钢的高温扭转疲劳性能[J].材料研究学报,2007,21(增刊):1-5. |
| [3] | 金磊,夏慧琴.扭转疲劳试验的探索性研究[J].材料工程,1997(06):34. |
| [4] | 刘昆鹏,有移亮,张珊,张峥.50CrVA扭杆断裂原因分析[J].材料工程,2010(08):5-7,11. |
| [5] | 雒设计,赵康,王荣.S135钻杆钢的拉扭复合加载疲劳行为[J].材料工程,2013(01):40-44. |
| [6] | 马楠楠,陶春虎,何玉怀,刘新灵.航空发动机叶片多轴疲劳试验研究进展[J].航空材料学报,2012(06):44-49. |
| [7] | 田玉杰,尚德广,陈宏,刘建中.单多轴变幅加载下TC21钛合金疲劳特性[J].航空材料学报,2013(02):74-80. |
| [8] | 沈明学,彭金方,郑健峰,宋川,莫继良,朱旻昊.微动疲劳研究进展[J].材料工程,2010(12):86-91. |
| [9] | 赵廷仕;刘敦康;纪惠君 .35 钢低周扭转应变疲劳的研究[J].金属学报,1987,32(2):156-157. |
| [10] | M. Daunys;R. Cesnavicius .Investigation of low cycle asymmetric torsion[J].Mechanika,2010(6 TN.86):5-10. |
| [11] | DECKER R F;FLOREEN S.Maraging steels-the first 30 years[J].Maraging Steels:Recent Developments and Ap-plications,1988:1-38. |
| [12] | 姜越,尹钟大,朱景川,李明伟.超高强度马氏体时效钢的发展[J].特殊钢,2004(02):1-5. |
| [13] | 孙永健;程琴;唐雪艳 .变工况下汽轮机转子热应力分析及低周疲劳寿命计算[J].机械工程学报,2013,3(2):28-36. |
| [14] | BROWN M W;MILLER K J .High temperature low cycle biaxial fatigue of two steels[J].Fatigue & Fracture of En-gineering Materials &Structures,1979,1(2):217-229. |
| [15] | 钟斌,何玉怀,苏彬.1Cr11Ni2W2MoV和16Ni3CrMoE两种钢的高温扭转疲劳性能研究[J].机械强度,2004(z1):169-171. |
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