| GS249有机玻璃疲劳极限的影响因素分析及预测 |
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| 引用本文： | 辛艳粉,王泓,陈新文,乙晓伟. GS249有机玻璃疲劳极限的影响因素分析及预测[J]. 科学技术与工程, 2012, 12(12): 3019-3022,3026 |
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| 作者姓名： | 辛艳粉 王泓 陈新文 乙晓伟 |
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| 作者单位： | 1. 西北工业大学材料学院,西安,710072
2. 北京航空材料研究院,北京,100095 |
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| 摘 要： | 在不同应力比条件下，对不同应力集中系数的GS249有机玻璃疲劳试样进行疲劳试验，使用升降法获得材料的疲劳极限。分析获得了加载参数及形状参数对有机玻璃疲劳极限影响的相关规律。建立了基于应力比和应力集中系数的预测有机玻璃疲劳极限的方法模型。结果表明：随着应力比的增加，疲劳极限呈下降趋势；疲劳极限随着应力集中系数的增加而线性降低；随着应力集中系数的降低，疲劳极限受应力比的影响越大。
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| 关 键 词： | 有机玻璃；升降法；疲劳极限；应力比；应力集中系数； |
| 收稿时间： | 2012-02-13 |
| 修稿时间： | 2012-02-13 |
Analysis on influence factor and prediction of Plexiglas GS 249 fatigue limit |
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| xinyanfen,wanghong,chenxinwen and yixiaowei. Analysis on influence factor and prediction of Plexiglas GS 249 fatigue limit[J]. Science Technology and Engineering, 2012, 12(12): 3019-3022,3026 |
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| Authors: | xinyanfen wanghong chenxinwen yixiaowei |
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| Affiliation: | 1(School of Materials Science and Engineering,Northwestern Polytechnical University1,Xi’an 710072,P.R.China; Beijing Institute of Aeronautical Materials2,Beijing 100095,P.R.China) |
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| Abstract: | The fatigue tests of Plexiglas GS 249 with different coefficients of stress concentration were conducted in different stress ratio conditions,and obtained the material fatigue limits using the Up-down method.The method model to predict the fatigue limits of PMMA are established based on the stress ratio and coefficients of stress concentration.The related laws of the loading parameters and shape parameters affecting the fatigue limits of PMMA were obtained in the analysis.The results show that,the fatigue limits have a downward trend with the increase of stress ratio,the fatigue limits linearly reduce as the coefficients of stress concentration increase,and the fatigue limits are impacted greater by the stress ratio with the reduction of stress concentration coefficients. |
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| Keywords: | plexiglas up-down method fatigue limit stress R-ratio stress concentration factor |
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