A general form for calculating residual stresses detected by using the holographic blind-hole method |
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Authors: | S T Lin C T Hsieh C K Lee |
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Institution: | (1) Department of Mechanical Engineering, National Taipei University of Technology, Republic of China;(2) Department of Mechanical Engineering, St. Jone's and St. Mary's Institute of Technology, Republic of China;(3) Institute of Applied Mechanics, National Taiwan University, Republic of China |
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Abstract: | A general form used for analyzing residual stresses measured using the holographic blind-hole method is introduced in this
paper. Adopting the general form presented, the residual stresses can be obtained using three relative displacements measured
from a single interference fringe pattern. Even for the case in which phase-shifting holographic interferometry is not employed,
interpolating calculations for determining the fringe orders are not needed, since the choice of data points becomes more
flexible when using this general form. Two experiments, the first one carried out by the authors and the second one published
previously, are used to illustrate the applicability and usefulness of this general form. Suggestions for the applications
of this general form are also established via the upper bound error estimations. |
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Keywords: | Holography residual stresses |
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