| 利用红外热像技术快速确定材料疲劳极限 |
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| 引用本文： | 刘浩,曾伟,丁桦,赵军.利用红外热像技术快速确定材料疲劳极限[J].力学与实践,2007,29(4):36-39. |
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| 作者姓名： | 刘浩 曾伟 丁桦 赵军 |
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| 作者单位： | 北京化工大学机电工程学院，北京 100029 湖南大学汽车车身先进设计制造国家重点实验室，长沙 410082 中科院力学所 北京 100080 北京化工大学机电工程学院 100029 |
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| 摘 要： | 基于能量理论，阐述了利用红外热像方法确定材料疲劳极限的原理，并利用红外热
像仪对具有矩形截面的钢试件进行了疲劳试验，通过记录疲劳试验过程中试件表面的温度变
化，经处理后得到了该种材料的疲劳极限. 试验表明，利用红外热像技术可以快速、准确地
确定材料的疲劳极限. 同时，该方法还具有可靠、经济、便捷等优点.
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| 关 键 词： | 疲劳 能量理论 红外热像技术 疲劳试验 |
| 收稿时间： | 2006-6-15 |
| 修稿时间： | 2006-06-152007-04-12 |
FATIGUE LIMIT FAST EVALUATION USING AN INFRARED THERMOGRAPHIC TECHNIQUE |
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| LIU Hao,ZENG Wei,DING Hua,ZHAO Jun.FATIGUE LIMIT FAST EVALUATION USING AN INFRARED THERMOGRAPHIC TECHNIQUE[J].Mechanics and Engineering,2007,29(4):36-39. |
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| Authors: | LIU Hao ZENG Wei DING Hua ZHAO Jun |
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| Institution: | 1.College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China;2.State Key Lab of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha 410082, China;3.Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | Fatigue damage is one of the main failure mode of engineering structure and machinery,so it is important to determine the fatigue limit of materials.This paper,based on fatigue energy theory,discusses the principle that materials'fatigue limit can be determined by thermographic method.The fatigue test of a steel specimen with rectangular section is carried out using infrared thermal sensor,and the variation of temperature on the specimen is recorded during the fatigue test,and the fatigue limit of the material is then evaluated.The experiment indicates that the infrared thermographic technique can determine the fatigue limit of materials fast and accurately,and this method enjoys reliability,economy and convenience. |
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| Keywords: | fatigue energy theory infrared thermographic technique fatigue test |
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