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A finite-element technique to analyze the data measured by the hole-drilling method

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Abstract

A finite-element technique to analyze the data obtained by the hole-drilling strain-gage method is presented. In this study, residual stresses are assumed as initial stresses existing in the structural material or component. It is also assumed that the elimination of the initial stresses in the region of the drilled hole changes the measured strains. After putting initial stresses into displacement finite-element equations and comparing the stiffness matrix and the initial stresses matrix with those of the previous increment, equations relating unknown initial stresses and measured strains were obtained. By solving these equations, residual stresses were obtained. In this paper three examples are studied. In the first two examples, calibration constants C1 to be used in determining residual stress were calculated which varied with depth. In the third example, the data obtained by using the hole-drilling method are analyzed. All examples show good agreement with previous studies. Using the present method allows greater flexibility of choice of specimen shape, materials, and experimental procedure than would be possible if only analytic solutions were used.

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References

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Authors and Affiliations

  1. Department of Power Mechanical Engineering, National Tsing-Hua University, 30043, Hsinchu, Taiwan, Republic of China

    D. Shaw (Associate Professor) & H. Y. Chen (Graduate Student)

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  1. D. Shaw
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  2. H. Y. Chen
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Shaw, D., Chen, H.Y. A finite-element technique to analyze the data measured by the hole-drilling method. Experimental Mechanics 30, 120–123 (1990). https://doi.org/10.1007/BF02410236

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  • DOI: https://doi.org/10.1007/BF02410236

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