Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(5), 79-88 | DOI: 10.11118/actaun201260050079
Experimental application of contour method for determination of residual stress in subsurface layers of milled sample
- Ústav techniky a automobilové dopravy, Mendelova univerzita v Brně, Zemědělská 1, 613 00 Brno, Česká republika
Determination of residual stress close to the sample surface is in the most cases performed by hole-drilling method, X-Ray diffraction or neutron diffraction. Each of these methods has its benefits and disadvantages. In case of diffraction methods the measurement speed is the main disadvantage. It is also very problematic to apply diffraction method in case of sample with mechanically deformed surface, for example by standard machining operations. Therefore, determined results are very often confusing and hard to interpret. On the other side, hole drilling method is less sensitive to quality of sample surface than diffraction methods, but measurement realization is quite expensive and equipment demanding (strain gage rosettes, miniature milling cutter, high speed milling machine, pc equipment,...).
Recently introduce contour method used for determination of residual stress inside the sample is very fast, can be performed with almost common laboratory equipment and combines traditional stance with modern numerical methods by FEM. Contour method was selected for determination of residual stress below the milled surface and the dependency of milling process quality on residual stress value is demonstrated.
Keywords: residual stress, surface, contour method, milling, cooling
Grants and funding:
This study was supported and financed by the internal grant agency Mendel University in Brno - Faculty of Agronomy No. IP 10/2010.
Received: March 9, 2012; Prepublished online: July 24, 2013; Published: July 30, 2013 Show citation
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References
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