| 一个高周疲劳损伤演化修正模型 |
| |
| 引用本文： | 杨锋平,孙秦,罗金恒,张华. 一个高周疲劳损伤演化修正模型[J]. 力学学报, 2012, 44(1): 140-147. DOI: 10.6052/0459-1879-2012-1-lxxb2010-594 |
| |
| 作者姓名： | 杨锋平 孙秦 罗金恒 张华 |
| |
| 作者单位： | 1.中国石油集团石油管工程技术研究院, 石油管力学和环境行为重点实验室 |
| |
| 摘 要： | 将连续损伤力学应用到疲劳问题中, 得到合理的疲劳损伤演化方程,被认为是预测疲劳寿命最有效的方法之一. 在研究Lemaitre最新疲劳损伤演化方程基础上, 根据试验数据提出了一个修正的高周疲劳损伤演化方程, 该方程可以考虑应力幅、平均应力等影响因素. 以2A12-T4铝合金为例, 得到了修正模型的材料常数. 将该修正模型以UMAT子程序形式嵌入ABAQUS主程序, 计算了两种构件14种不同受载情况下的疲劳寿命, 所得计算寿命与试验结果误差均值约15%, 说明修正的疲劳损伤演化方程可以很好地计算金属构件的高周疲劳寿命.
|
| 关 键 词： | 有限元方法 |
| 收稿时间： | 2010-09-03 |
| 修稿时间： | 2011-05-16 |
A CORRECTED DAMAGE LAW FOR HIGH CYCLE FATIGUE |
| |
| Yang Fengping,Sun Qin+ Luo Jinheng Zhang Hua. A CORRECTED DAMAGE LAW FOR HIGH CYCLE FATIGUE[J]. chinese journal of theoretical and applied mechanics, 2012, 44(1): 140-147. DOI: 10.6052/0459-1879-2012-1-lxxb2010-594 |
| |
| Authors: | Yang Fengping Sun Qin+ Luo Jinheng Zhang Hua |
| |
| Affiliation: | 1.The Key Laboratory for Mechanical and Environmental Behavior of Tubular Goods, CNPC Tubular Goods Research Institute, Xi'an 710065, China2.School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China |
| |
| Abstract: | It is an effective method to use continuum damage mechanics(CDM) to solve fatigue problems.A corrected damage law for high cycle fatigue is postulated to accord with experimental data based on the latest Lemaitre damage law.Stress amplitude and mean stress can be taken into account in this corrected damage law. Take 2A12-T4 aluminum alloy as an example,the material parameters were gotten for this correction damage model.Let this model be an UMAT subroutine of ABAQUS.Fatigue lives of 14 loading situations for two components were computed.The result shows that the mean error between experimental and computational result is about 15%,which shows this corrected fatigue damage law can preferably forecast high cycle fatigue life for metallic components. |
| |
| Keywords: | high cycle fatigue damage damage law FEM（finite element method） |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《力学学报》浏览原始摘要信息 |
|
点击此处可从《力学学报》下载全文 |
|
