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Energy Dissipation Measurement in Improved Spatial Resolution Under Fatigue Loading
- Source :
- Experimental Mechanics. 60:181-189
- Publication Year :
- 2020
- Publisher :
- Springer, 2020.
-
Abstract
- Recently, a technique for rapidly determining a material’s fatigue limit by measuring energy dissipation using infrared thermography has received increasing interest. Measuring the energy dissipation of a material under fatigue loading allows the rapid determination of a stress level that empirically coincides with its fatigue limit. To clarify the physical implications of the rapid fatigue limit determination, the relationship between energy dissipation and fatigue damage initiation process was investigated. To discuss the fatigue damage initiation process at grain size scale, we performed high-spatial-resolution dissipated energy measurements on type 316L austenitic stainless steel, and observed the slip bands on the same side of the specimen. The preprocessing of dissipated energy measurement such as motion compensation and a smoothing filter was applied. It was found that the distribution of dissipated energy obtained by improved spatial resolution measurement pinpointed the location of fatigue crack initiation. Owing to the positive correlation between the magnitude of dissipated energy and number of slip bands, it was suggested that the dissipated energy was associated with the behavior of slip bands, with regions of high dissipated energy predicting the location of fatigue crack initiation.
- Subjects :
- Materials science
Aerospace Engineering
02 engineering and technology
engineering.material
Dissipated energy
Stainless steel
Computer Science::Robotics
0203 mechanical engineering
Austenitic stainless steel
Image resolution
Mechanical Engineering
Lüders band
Mechanics
Dissipation
021001 nanoscience & nanotechnology
Slip band
Fatigue limit
Grain size
020303 mechanical engineering & transports
Mechanics of Materials
Solid mechanics
Thermography
engineering
Infrared thermography
Crack initiation
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 00144851
- Volume :
- 60
- Database :
- OpenAIRE
- Journal :
- Experimental Mechanics
- Accession number :
- edsair.doi.dedup.....d615d099f6dda21c3ddb307e0fd57d05