ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Fatigue life prediction for titanium plate considering impact defect
Received date: 2015-07-23
Revised date: 2015-11-03
Online published: 2015-11-19
Supported by
Innovation Foundation of BUAA for Ph.D.Graduates
Based on the theory of continuum damage mechanics, fatigue life prediction for Ti-1023 titanium plate with impact pit is studied. By analyzing the combined effect of impact damage and fatigue damage, considering the coupling effect of stress field and damage field, the fatigue life of titanium plate with impact pit is predicted. Firstly, on the basis of the continuum kinematics theory, the nonlinear dynamic finite element analysis software is used to simulate the process of impact damage, and the residual stress field and plastic strain field around impact pit are also obtained. Secondly, the initial damage field is calculated according to the plastic damage model, which will be input as the initial conditions of the subsequent fatigue calculation. Then, the multiaxial fatigue damage model of Chaudonneret is adopted and the damage mechanics-finite element numerical method is proposed to conduct the damage evolution calculation. Finally, this method is used to predict the fatigue life of titanium plate with impact pit and the corresponding fatigue tests are conducted for validation. The results show that the prediction lives are in accordance with test data. The research provides a feasible method for fatigue life prediction of metal component with impacted damage in engineering practice.
Key words： impact pit; residual stress; damage mechanics; plastic deformation; fatigue life
ZHAN Zhixin , TONG Yang , LI Binkai , HU Weiping , MENG Qingchun . Fatigue life prediction for titanium plate considering impact defect[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016 , 37(7) : 2200 -2207 . DOI: 10.7527/S1000-6893.2015.0298
[1] SURESH S. Fatigue of materials[M]. Cambridge:Cambridge University Press, 1998:1-10.
[2] 姚卫星. 结构疲劳寿命分析[M]. 北京:国防工业出版社, 2003:20-25. YAO W X. Fatigue life prediction of structures[M]. Beijing:National Defense Industry Press, 2003:20-25(in Chinese).
[3] FATEMI A, YANG L. Cumulative fatigue damage and life prediction theories:A survey of the state of the art for homogeneous materials[J]. International Journal of Fatigue, 1998, 20(1):9-34.
[4] CHABOCHE J, LESNE P. A nonlinear continuous fatigue damage model[J]. Fatigue & Fracture of Engineering Materials & Structures, 1988, 11(1):1-17.
[5] MARTIN B. A theory of fatigue damage accumulation and repair in cortical bone[J]. Journal of Orthopaedic Research, 1992, 10(6):818-825.
[6] CHABOCHE J L. Continuous damage mechanics-A tool to describe phenomena before crack initiation[J]. Nuclear Engineering and Design, 1981, 64(2):233-247.
[7] LEMAITRE J. A course on damage mechanics[M]. Berlin:Springer-Verlag, 1992:1-20.
[8] 郑战光, 蔡敢为, 李兆军. 一种新的疲劳损伤演化模型[J]. 工程力学, 2010, 27(2):37-40. ZHENG Z G, CAI G W, LI Z J. A new model of fatigue damage evolution[J]. Engineering Mechanics, 2010, 27(2):37-40(in Chinese).
[9] LEMAITRE J, DESMORAT R. Engineering damage mechanics:Ductile, creep, fatigue and brittle failures[M]. Berlin:Springer-Verlag, 2005:53-59.
[10] NIKITIN I, ALTENBERGER I. Comparison of the fatigue behavior and residual stress stability of laser-shock peened and deep rolled austenitic stainless steel AISI 304 in the temperature range 25-600℃[J]. Materials Science and Engineering:A, 2007, 465(1-2):176-182.
[11] LI P, MAIJER D M, LINDLEY T C, et al. A through process model of the impact of in-service loading, residual stress, and microstructure on the final fatigue life of an A356 automotive wheel[J]. Materials Science and Engineering:A, 2007, 460(1):20-30.
[12] BELLETT D, TAYLOR D, MARCO S, et al. The fatigue behaviour of three-dimensional stress concentrations[J]. International Journal of Fatigue, 2005, 27(3):207-221.
[13] TIMOSHENKO S P, GERE J M. Theory of elastic stability[M]. New York:Courier Dover Publications, 2009:1-15.
[14] DHATT G, LEFRANCOIS E, TOUZOT G. Finite element method[M]. Cambridge:John Wiley & Sons, 2012:1-10.
[15] LEMAITRE J. Mechanics of solid materials[M]. Cambridge:Cambridge University Press, 1994:121-345.
[16] CHAUDONNERET M. A simple and efficient multiaxial fatigue damage model for engineering applications of macro-crack initiation[J]. Journal of Engineering Materials and Technology, 1993, 115(4):373-379.
[17] 吴学仁. 飞机结构金属材料力学性能手册:静强度疲劳/耐久性[M]. 北京:航空工业出版社, 1996:486-487. WU X R. Handbook of mechanical properties of aircraft structural metals[M]. Beijing:Aviation Industry Press, 1998:486-487(in Chinese).
[18] ZHAN Z X, HU W P, ZHANG M, et al. The fatigue life prediction for structure with surface scratch considering cutting residual stress, initial plasticity damage and fatigue damage[J]. International Journal of Fatigue, 2015, 74:173-182.
[19] ZHANG T, MCHUGH P, LEEN S. Finite element implementation of multiaxial continuum damage mechanics for plain and fretting fatigue[J]. International Journal of Fatigue, 2012, 44(2):260-272.
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