| 基于有限元方法的裂纹扩展寿命预测 |
| |
| 引用本文： | 胡殿印,王荣桥,邓俊. 基于有限元方法的裂纹扩展寿命预测[J]. 机械强度, 2009, 31(2) |
| |
| 作者姓名： | 胡殿印 王荣桥 邓俊 |
| |
| 作者单位： | 北京航空航天大学,能源与动力工程学院,北京,100083;北京航空航天大学,能源与动力工程学院,北京,100083;北京航空航天大学,能源与动力工程学院,北京,100083 |
| |
| 摘 要： | 采用有限元方法确定结构的断裂力学参量,并与标准紧凑拉伸试样(compact tension,CT)的理论值相比较,结果表明有限元方法确定结构的断裂力学参量是可行的.以真实构件发动机涡轮盘为例,首先进行该结构的断裂力学分析;然后进行二次开发模拟构件的裂纹扩展,计算断裂力学参量,拟合出其与裂纹长度的函数关系,确定涡轮盘的临界裂纹长度;最后,选取试验确定的疲劳裂纹扩展率模型,完成构件的裂纹扩展寿命预测,通过与试验检测的结果相对比,证明基于有限元方法的裂纹扩展寿命预测是合理有效的.
|
| 关 键 词： | 有限元法 裂纹扩展 J积分 寿命预测 涡轮盘 |
CRACK GROWTH LIFE PREDICTION BASED ON FINITE ELEMENT METHOD |
| |
| HU DianYin,WANG RongQiao,DENG Jun. CRACK GROWTH LIFE PREDICTION BASED ON FINITE ELEMENT METHOD[J]. Journal of Mechanical Strength, 2009, 31(2) |
| |
| Authors: | HU DianYin WANG RongQiao DENG Jun |
| |
| Affiliation: | School of Jet Propulsion;Beijing University of Aeronautics and Astronautics;Beijing 100083;China |
| |
| Abstract: | Finite element method(FEM) is proved feasible to obtain structural fracture parameters compared with theoretical results of compact tension specimen(CT).Damage tolerance analysis on the turbine disk component based on FEM was performed.Firstly,structural stress and strain were obtained through FEM analysis.Then the programme was developed based on FEM to calculate fracture mechanics parameters such as stress intensity factor,J integral and further to simulate crack growth.A relation between the parameters a... |
| |
| Keywords: | Finite element method Crack growth J integral Life prediction Turbine disk |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
