| COMPUTATIONAL SIMULATION |
|
|
|
|
|
| Fatigue Crack Initiation and Extension Regularity Based on Damage Mechanics |
| SUN Zhili, CHAI Xiaodong, LIU Xixi, WANG Jian
|
| School of Mechanical Engineering & Automation,Northeastern University, Shenyang 110819 |
|
|
|
|
Abstract Aiming at the problem of metal fatigue crack initiation and propagation life forecast, an unified a model was presented based on damage mechanics and finite element method, and the calculating program was established.The stiffness matrix was continuously calculated by introducing the additional loading method.The calculating program was designed in MATLAB and the calculation flow diagram was showed in this paper.Then through the calculation of a single cell,the changing process of equivalent stress was presented with the cell from undamaged state to completely damaged state and the reasons of the changes were analyzed. It was found that the crack initiation and propagation life was more than 80% of the total life. By finite element software ANSYS simulation, the crack initiation and propagation process of notched specimen were obtained. Finally, the results of theoretical calculation and the experimental data were basically identical, which verify the accuracy of this method.
|
|
Published: 02 May 2018
|
|
|
|
|
1 Colin R Gagg, Peter R Lewis. In-service fatigue failure of engineered products and structures-Case study review[J]. Eng Failure Analysis,2009,16:1775.
2 Zheng Jinyang, Wu Linlin, Shi Jianfeng. Extreme pressure equipments[J].Chin J Mech Eng,2011,24(2):202.
3 Riahi H, Bressolette P H, Chateauneuf A. Random mode by stochastic collocation method[J]. Eng Fatigue Crack Growth Mixed Fracture Mech,2010,77:3292.
4 Li Aimin, Cui Haitao, Wen Weidong, et al. Prediction of fretting fatigue life based on nonlinear continuum damage mechanics[J].Acta Aeronautica et Astronautica Sinica,2013,34(9):2122(in Chinese).
李爱民,崔海涛,温卫东,等.基于非线性连续介质损伤力学方法的微动疲劳寿命预测[J].航空学报,2013,34(9):2122.
5 Li Qiang, Zhang Liting, Qi Qinglan, et al. Study of the curve branch crack model for the closed flaw under compressive loading[J]. Eng Mech,2013,30(4):294(in Chinese).
李强,张力霆,齐清兰,等. 压缩载荷下闭合裂纹的曲线分支裂纹模型研究[J].工程力学,2013,30(4):294.
6 Shangguan Wenbin, Wang Xiaoli, Duan Xiaocheng, et al. Fatigue crack growth experiment and modeling for rubbers used in isolators under variable amplitude loads[J]. J Mech Eng,2015,51(8):50(in Chinese).
上官文斌,王小莉,段小成,等. 变幅载荷下隔振器橡胶材料裂纹扩展试验及建模方法[J]机械工程学报,2015,51(8):50.
7 Yang Jiyun, Zhang Xing, Zhang Min. Numerical method for crack extension analysis based on fatigue crack formation curve[J]. J Mech Eng,2004,40(7):50(in Chinese).
杨继运,张行,张珉.基于疲劳裂纹形成曲线的裂纹扩展分析数值方法[J].机械工程学报,2004,40(7):50.
8 Dattoma V, Giancane S, Nobile R,et al. Fatigue life prediction under variable loading based on a new non-linear continuum damage mechanics model[J]. Int J Fatigue,2006,28(2):89.
9 Gou Yilong,Yin Zhiping,Huang Qiqing. A finite element method for prediction of pitting-corrosion fatigue life based on damage mechanics[J]. Adv Aeronautical Sci Eng,2014,2(5):233(in Chinese).
苟义龙,殷之平,黄其青. 基于损伤力学预估点蚀疲劳寿命有限元法[J].航空工程进展,2014,2(5):233.
10 Li Yousheng,Ma Qiaomei,Guo Xuxia, et al. Crack initiation life prediction of notch structure based on damage mechanics[J]. J Machine Des,2015,32(12):93(in Chinese).
李友胜,马巧梅,郭旭侠,等.基于损伤力学预估切口构件裂纹形成寿命[J]. 机械设计,2015,32(12):93.
11 Zhang Yanjun, Zhang Miao, Hu Weiping, et al. Fatigue life prediction of the joint plate based on damage mechanics method[J]. J Mech Strength,2011,33(3):443(in Chinese).
张彦军,张淼,胡伟平,等. 基于损伤力学方法的带板连接件疲劳寿命预估[J].机械强度,2011,33(3):443.
12 Fei Shen, Wei Pinghu. A new damage mechanics based approach to fatigue life prediction and its engineering application[J]. Acta Mechanica Solid Sinica,2015,28(5):357.
13 张行.断裂与损伤力学[M].北京:北京航空航天大学出版社,2006.
14 高镇同, 蒋新桐, 熊峻江,等. 疲劳性能实验设计和数据处理[M].北京:北京航空航天大学出版社,2008.
|
|
|
|
渝公网安备50019002502923号 © Editorial Office of Materials Reports.
2017, Vol. 31 
