高温低周疲劳短裂纹萌生的数值模拟
Numerical Simulation of Low-Cycle Short Fatigue Crack Initiation at High Temperature
摘 要
基于大量的高温低周疲劳试验, 编写Matlab程序修正voronoi多边形模拟了20钢表面的显微组织; 用有限元软件计算得到了不同试验条件下试样表面的应力、应变状态; 以基础能量表征晶界及滑移带抵抗裂纹萌生的能力, 改进位错累积理论并计算获得了裂纹的萌生寿命, 实现了对低碳钢高温低周疲劳短裂纹萌生的数值模拟。结果表明: 在高温下, 疲劳短裂纹主要萌生于应力集中处的驻留滑移带及不稳定晶界上, 受表面显微组织的影响, 既有沿晶萌生又有穿晶萌生; 修正的voronoi多边形很好地反映了表面显微组织, 数值模拟能够准确再现不同循环次数下疲劳短裂纹的群体萌生行为。
低周疲劳
短裂纹
萌生寿命
数值模拟
high temperature
low-cycle fatigue
short fatigue crack
initiation life
numerical simulation
Abstract
Based on lots of low-cycle fatigue experiments of 20 steel at high temperature, surfacial microstructure of the steel was simulated by voronoi-polygen modified by writing Matlab program, and then, the stress and strain state on sample surface under different test conditions were calculated using ANSYS software. The numerical simulation for shor fatigue crack of low carbon steel at high temperature was achieved by the following: using basic energy to characteristic grain boudaries and the ability of slip band resisting crack initiation, and modifying dislocation pile-up theory and then obtain initiation life of crack by calculation. The results show that shor fatigue cracks mainly initiated from persistent slip band and unstable grain boudaries, the cracks exhibited both intergranular and transgranular initiation affected by surfacial microstructure. The modified voronoi-polugen could reflect surfacial microstructure well, and the numerical simulation could accurately reproduce the group initiation behavior of shor fatigue cracks at different cycles.
中图分类号 TK05 TG115
所属栏目 物理模拟与数值模拟
基金项目 国家自然科学基金资助项目(50771024)
收稿日期 2013/3/15
修改稿日期 2014/1/13
网络出版日期
作者单位点击查看
备注王正(1960-), 男, 辽宁抚顺人, 教授, 硕士。
引用该论文: WANG Zheng,TAN Wei-tong,WANG Lu,CHEN Nan. Numerical Simulation of Low-Cycle Short Fatigue Crack Initiation at High Temperature[J]. Materials for mechancial engineering, 2014, 38(3): 90～95
王正,谭伟同,王璐,陈楠. 高温低周疲劳短裂纹萌生的数值模拟[J]. 机械工程材料, 2014, 38(3): 90～95
被引情况:
【1】吴海利,安春香,王朋,丁玉明,王德强, "2.25CrMoV钢于夹杂物和晶界处开裂低周疲劳裂纹扩展的原位观测",机械工程材料 40, 15-18(2016)
【2】陈凯,杜东海,陆辉,张乐福,徐雪莲,石秀强,孟凡江,鲍一晨,刘晓强, "用直流电压降法研究316LN不锈钢的疲劳裂纹扩展行为",机械工程材料 40, 7-10(2016)
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参考文献
【1】SUBRA S. Fatigue of materials［M］.London: Cambridge University Press,1998.
【2】HOBSON P D. The growth of short fatigue cracks in a medium carbon steel (Ph D Thesis)［D］.Sheffield, U K: University of Sheffield,1985.
【3】TANAKA K, MURA T.A dislocation model for fatigue crack initiation［J］.Journal of Applied Mechanics-Transactions of the ASME, 1981, 48(1):97-103.
【4】张广平, 王中光.晶体取向和载荷模式对Ni3Al合金单晶体疲劳行为的影响［J］.金属学报, 1997,33(10):1009-1014.
【5】段启强, 张辉, 莫春丽, 等.驻留滑移带与晶界和孪晶界的交互作用［J］.材料研究学报,2006,20(5):449-453.
【6】张哲峰, 张鹏, 田艳中, 等.金属材料疲劳损伤的界面效应［J］.金属学报, 2009,45(7):788-800.
【7】HNECKE J, KLINGBEIL D.Advanced life prediction by microstructural simulation of short cracks in a low carbon steel ［J］.International Journal of Fatigue, 2006, 28(9):993-1000.
【8】芦亚萍, 何闻.振动时效机理及其对疲劳寿命的影响分析［J］.农业机械学报, 2006,33(12):197-200.
【9】郭隽, 郭成璧, 梁莎莉.2.25Cr-1Mo合金钢400℃下表面疲劳裂纹群体演化行为研究及计算机模拟［J］.航空学报, 2001,22(5):447-450.
【10】FIGUEROA J C, LAIRD C.Crack initiation mechanisms in copper polycrystals cycled under constant strain amplitudes and in step tests［J］.Materials Science and Engineering,1983,60(1):45-58.
【11】WATANABE T. Structural effects on grain-boundary segregation, hardening and fracture［J］.Journal de Physique, 1985, 46(C4):555-566.
【12】郭隽.高温疲劳表面短裂纹群体演化行为研究及数值模拟［D］.大连:大连理工大学, 2000:86-95.
【13】魏安安, 纪熙, 李艳斌, 等.带缺口构件疲劳寿命的研究进展［J］.机械工程材料,2011,35(3):1-3,31.
【14】HOSHIDE T, TAKAHASHI Y. Simulation of directional distribution of slip-band crack under biaxial low cycle fatigue［J］.JSME Int J A,2004,47(3):397-402.
【15】HOSHIDE T. Biaxial fatigue life predicted by crack growth analysis in various material microstructures modeled by voronoi-polygons ［J］.ASM International, 2010, 20:1497-1504.
【16】王璐, 王正, 于淼.高温低周疲劳表面短裂纹合体与干涉行为的实验研究及数值模拟［J］.机械强度, 2008, 30(4):642-646.
【17】HOSHIDE T, KUSUURA T. Life prediction by simulation of crack growth in notched components with different microstructures and under multiaxial fatigue［J］.Fatigue Fract Eng Mater Struct,1998,21(2):201-213.
【2】HOBSON P D. The growth of short fatigue cracks in a medium carbon steel (Ph D Thesis)［D］.Sheffield, U K: University of Sheffield,1985.
【3】TANAKA K, MURA T.A dislocation model for fatigue crack initiation［J］.Journal of Applied Mechanics-Transactions of the ASME, 1981, 48(1):97-103.
【4】张广平, 王中光.晶体取向和载荷模式对Ni3Al合金单晶体疲劳行为的影响［J］.金属学报, 1997,33(10):1009-1014.
【5】段启强, 张辉, 莫春丽, 等.驻留滑移带与晶界和孪晶界的交互作用［J］.材料研究学报,2006,20(5):449-453.
【6】张哲峰, 张鹏, 田艳中, 等.金属材料疲劳损伤的界面效应［J］.金属学报, 2009,45(7):788-800.
【7】HNECKE J, KLINGBEIL D.Advanced life prediction by microstructural simulation of short cracks in a low carbon steel ［J］.International Journal of Fatigue, 2006, 28(9):993-1000.
【8】芦亚萍, 何闻.振动时效机理及其对疲劳寿命的影响分析［J］.农业机械学报, 2006,33(12):197-200.
【9】郭隽, 郭成璧, 梁莎莉.2.25Cr-1Mo合金钢400℃下表面疲劳裂纹群体演化行为研究及计算机模拟［J］.航空学报, 2001,22(5):447-450.
【10】FIGUEROA J C, LAIRD C.Crack initiation mechanisms in copper polycrystals cycled under constant strain amplitudes and in step tests［J］.Materials Science and Engineering,1983,60(1):45-58.
【11】WATANABE T. Structural effects on grain-boundary segregation, hardening and fracture［J］.Journal de Physique, 1985, 46(C4):555-566.
【12】郭隽.高温疲劳表面短裂纹群体演化行为研究及数值模拟［D］.大连:大连理工大学, 2000:86-95.
【13】魏安安, 纪熙, 李艳斌, 等.带缺口构件疲劳寿命的研究进展［J］.机械工程材料,2011,35(3):1-3,31.
【14】HOSHIDE T, TAKAHASHI Y. Simulation of directional distribution of slip-band crack under biaxial low cycle fatigue［J］.JSME Int J A,2004,47(3):397-402.
【15】HOSHIDE T. Biaxial fatigue life predicted by crack growth analysis in various material microstructures modeled by voronoi-polygons ［J］.ASM International, 2010, 20:1497-1504.
【16】王璐, 王正, 于淼.高温低周疲劳表面短裂纹合体与干涉行为的实验研究及数值模拟［J］.机械强度, 2008, 30(4):642-646.
【17】HOSHIDE T, KUSUURA T. Life prediction by simulation of crack growth in notched components with different microstructures and under multiaxial fatigue［J］.Fatigue Fract Eng Mater Struct,1998,21(2):201-213.
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