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TECHNICAL PAPERS

On the Improvement of Calibration Coefficients for Hole-Drilling Integral Method: Part II—Experimental Validation of Calibration Coefficients

[+] Author and Article Information
Jong-Ning Aoh, Chung-Sheng Wei

Department of Mechanical Engineering, National Chung Cheng University, 160 San-Hsing, Minhsiung, Chiayi, 621, Taiwan, R.O.C.

J. Eng. Mater. Technol 125(2), 107-115 (Apr 04, 2003) (9 pages) doi:10.1115/1.1543972 History: Received September 13, 2001; Revised August 12, 2002; Online April 04, 2003
Copyright © 2003 by ASME
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References

Figures

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A two-dimensional FEM axisymmetric model for the determination of the calibration coefficients for the integral hole-drilling method 56
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A three-dimensional FEM model for the determination of the calibration coefficients for the integral hole-drilling method 11
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Loading conditions on the hole boundary and the position of gage elements in the three-dimensional models
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Change of Ai,i versus dimensionless thickness t/Rm at R/Rm=0.311
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Experimental setup for bending test of cantilever beam
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Transverse section of a hole revealing a reverse-cone shape with apparent diameter Da=2.0 mm, and bottom diameter Db=1.65 mm. An average diameter Davg is defined as Davg=(Da+Db)/2. The height of the reverse cone is 151.8 μm.
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Distribution of relieved stresses along the longitudinal direction on a bending specimen representing thinner plate after successive hole depth increment
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Difference between calibration coefficients āi,j obtained from the three-dimensional model in part I of this work 11 and the two-dimensional model of 6
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Applied stresses on the shallow hole depth and deeper hole depth 56
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Distribution of relieved stresses along the longitudinal direction at each hole depth increment obtained from hole drilling and bending test of a thick plate
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Change of āi,i versus dimensionless thickness t/Rm at R/Rm=0.3
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Probability bounds for the longitudinal relieved stresses calculated by using calibration coefficients corresponding to thin plate (t/Rm=1.34) and two-dimensional model

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