| 一种新的多轴低周疲劳损伤参量 |
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| 引用本文： | 孙国芹,尚德广,丁雷,邓静,贾冠华,王瑞杰.一种新的多轴低周疲劳损伤参量[J].北京工业大学学报,2006,32(8):688-692. |
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| 作者姓名： | 孙国芹 尚德广 丁雷 邓静 贾冠华 王瑞杰 |
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| 作者单位： | 北京工业大学,机械工程与应用电子技术学院,北京,100022 |
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| 基金项目： | 国家自然科学基金资助项目（10172010）. |
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| 摘 要： | 利用轴向和周向应变幅的最大值合成一个新的等效应变幅作为多轴疲劳损伤参量,考虑不同加载路径导致轴向和周向出现的平均应力的影响,结合Manson-Coffin方程提出了一个新的损伤模型．该模型经高温GH4169合金、45~#钢、Inconel 718钢和高温304不锈钢4种材料的多轴疲劳试验验证表明,寿命误差基本分散在2个因子之内．
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| 关 键 词： | 低周 疲劳 寿命 预测 多轴 等效应变 |
| 文章编号： | 0254-0037(2006)08-0688-05 |
| 收稿时间： | 04 28 2006 12:00AM |
| 修稿时间： | 2006年4月28日 |
A New Multiaxial Fatigue Damage Parameter Under Multiaxial Low Cycle Loading |
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| SUN Guo-qin,SHANG De-guang,DING Lei,DENG Jing,JIA Guan-hua,WANG Rui-jie.A New Multiaxial Fatigue Damage Parameter Under Multiaxial Low Cycle Loading[J].Journal of Beijing Polytechnic University,2006,32(8):688-692. |
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| Authors: | SUN Guo-qin SHANG De-guang DING Lei DENG Jing JIA Guan-hua WANG Rui-jie |
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| Affiliation: | College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100022, China |
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| Abstract: | A new multiaxial fatigue damage parameter applied to maximum amplitude of axial and circular strain is presented.The parameter which reflects the effect of loading paths,is convenient for application be- cause it does not have any material constants.Considering the average stress of the axial and circular stress re- sponses by different loading paths,a new multiaxial fatigue life prediction model is established by combining the multiaxial fatigue damage parameter with the Manson-Coffin equation.The errors between the predicted fatigue lives and multiaxial fatigue experimental results by testing four materials of GH4169 alloy,steel 45 and Inconel 718 steel and 304 stainless steel are within 2 factors. |
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| Keywords: | low cycle fatigue life prediction multiaxial equivalent strain |
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