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| A New Idea to Qualitatively Determine 3D Residual Stress Measurements |
LU Guoxin, LU Feng( ) |
| Metal Corrosion and Protection Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, China |
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Abstract A new idea was proposed in the present work, based on the principle for the balance of stress field strength, to judge qualitatively the surface residual stress trends, and it was verified by the experimental results in literatures. For the surface-strengthened sample with a surface residual compressive stress field, the proposed theory shows that, the cumulative stress relaxation rate leads to the sharp decrease in the rest of the residual compressive stress field intensity and residual tensile stress field intensity, the surface residual stress measurements within a certain depth range are slightly greater than the actual values, the depth of surface residual compressive stress field is larger than that of the actual residual compressive stress field.
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Received: 20 August 2013
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