On the Application of Infrared Thermography and Potential Drop for the Accelerated Determination of an S-N Curve

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• 作者：N. Micone ; W. De Waele
• 关键词：Fatigue limit ; S ; N curve ; Infrared thermography ; Potential drop ; Energetic approach
• 刊名：Experimental Mechanics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：57
• 期：1
• 页码：143-153
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Continuum Mechanics and Mechanics of Materials; Characterization and Evaluation of Materials; Optics, Lasers, Photonics, Optical Devices; Structural Mechanics; Vibration, Dynamical Systems, Control; C
• 出版者：Springer US
• ISSN：1741-2765
• 卷排序：57

文摘

The endurance approach has been used for fatigue design and assessment since many decades. In recent years, the use of infrared (IR) technology to assess fatigue damage has been gaining more interest. The infrared thermographic method reported in literature allows to define an entire S-N curve with a limited number of specimens. Inspired by that approach, a methodology based on the direct current potential drop (DCPD) technique is developed. It allows to determine an S-N curve in a quick manner and might potentially be used in application areas where IR is not feasible. The developed DCPD methodology and the established IR methodology have been applied to two high strength offshore steels. The so-obtained S-N curves show a very good correlation.