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Title: | COMPARATIVE STUDIES OF DRY RING-CORE AND BLIND HOLE DRILLING BASED RESIDUAL STRESS DETERMINATION OF BUTT-WELDS |
Authors: | Balla, Abhilash Kumar |
Keywords: | Mechanical Components;Semi-Destructive Techniques;Hole-Drilling Method;Ring-Core Method |
Issue Date: | May-2015 |
Publisher: | IIT ROORKEE |
Abstract: | The service life of many mechanical components is highly affected by the presence of residual stresses. 1-lence, quantifying them is very important. In this report, two commonly used semi-destructive techniques namely blind hole drilling method and ring-core method were used for measuring residual stresses. A finite element model was developed for calculating the necessary calibration coefficients of the ring-core method. Alternately regressions equations were also developed by which one could directly calculate the stresses from the strains at particular depths. Then, a comparison of the stress values obtained was made with the values obtained from the blind hole drilling technique. The over estimation of the stress values by the hole-drilling method is finally reported after validating the strain values obtained from another finite element model for hole-drilling method with the experimental data. Finally, the scope for utilizing the ring-core method for obtaining the stress profiles throughout the weld thickness is presented. |
URI: | http://localhost:8081/jspui/handle/123456789/17824 |
metadata.dc.type: | Other |
Appears in Collections: | MASTERS' THESES (MIED) |
Files in This Item:
File | Description | Size | Format | |
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G24620.pdf | 10.66 MB | Adobe PDF | View/Open |
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