Determination of Residual Stress by the Hole Drilling Method Based on Displacement Measurement

2005 ◽  
Vol 29 (11) ◽  
pp. 1542-1550
Author(s):  
Dong Il Shin ◽  
Jin Won Joo
Keyword(s):  
Residual Stress ◽  
Displacement Measurement ◽  
Hole Drilling ◽  
Hole Drilling Method ◽  
Drilling Method

scholarly journals Experimental application of contour method for determination of residual stress in subsurface layers of milled sample

2012 ◽  
Vol 60 (5) ◽  
pp. 79-88
Author(s):  
Karel Horák ◽  
Michal Černý ◽  
Petr Dostál
Keyword(s):  
Residual Stress ◽  
High Speed ◽  
Diffraction Method ◽  
Sample Surface ◽  
Contour Method ◽  
Hole Drilling ◽  
Laboratory Equipment ◽  
Hole Drilling Method ◽  
Drilling Method

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.

Measurement of Residual Stresses Near the Surface Using the Crack Compliance Method

1991 ◽  
Vol 113 (2) ◽  
pp. 199-204 ◽  
Author(s):  
W. Cheng ◽  
I. Finnie ◽  
O¨. Vardar
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Computational Model ◽  
Strain Measurement ◽  
Stress Measurement ◽  
Residual Stress Measurement ◽  
Hole Drilling ◽  
Hole Drilling Method ◽  
Drilling Method

The use of thin cuts for residual stress measurement is referred to as the crack compliance method. A computational model is presented for the determination of normal and shear residual stresses near the surface by introducing shallow cuts. The optimum regions for strain measurement are obtained. This method is shown to be considerably more sensitive than the conventional hole drilling method and is capable of measuring residual stresses which vary with depth below the surface.

Modification of Leak Before Break Criterion With Focus on the Residual Stress

2010 ◽  
Author(s):  
Katerina Macurova ◽  
Richard Tichy ◽  
Bohumir Strnadel
Keyword(s):  
Residual Stress ◽  
Pressure Vessels ◽  
Design Criterion ◽  
Hole Drilling ◽  
Critical Crack ◽  
Critical Crack Length ◽  
Hole Drilling Method ◽  
Drilling Method ◽  
Leak Before Break

The article deals with the study of the conditions of breach of pressure vessels and determination of the safety of use of the modified criteria of Leak Before Break when a residual stress is found in the material of a vessel. Design criterion is based on a critical crack length, which must be less than the thickness of the vessel wall. In this case it is guaranteed that there will not be an uncontrolled breach of the vessel. Superposition of residual stress, which occurs in the production of a vessel by impact extrusion, and the hoop stress caused by the internal pressure significantly affects the life and conditions of technical use. Size and character of the distribution of residual stresses were determined experimentally by use of the hole-drilling method. The numerical simulation and mathematical calculations used ANSYS and MATLAB software. The main attention was focused on the application of residual stress in the numerical analysis, based on values obtained by the experimental measurements hole–drilling method.

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