modeling and measurement of residual stress by hole drilling strain gauge
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Measurement of Residual Stresses by the Hole-Drilling* Strain Gage Method
For technical support, contact [email protected] www.vishaymg.com 19 Revision 15-Aug-07 I. Residual Stresses and Their Measurement Residual (locked-in) stresses in a structural material or component are those stresses that exist in the object without (and usually prior to) the application of any service or other external loads. Manufacturing processes are the most common causes of r...
متن کاملRemarks on Residual Stress Measurement by Hole-Drilling and Electronic Speckle Pattern Interferometry
Hole drilling is the most widespread method for measuring residual stress. It is based on the principle that drilling a hole in the material causes a local stress relaxation; the initial residual stress can be calculated by measuring strain in correspondence with each drill depth. Recently optical techniques were introduced to measure strain; in this case, the accuracy of the final results depe...
متن کاملResidual Stress Measurement of 7050 Aluminum Alloy Open Die Forgings Using the Hole-Drilling Method
Since this project is a result of a class assignment, it has been graded and accepted as fulfillment of the course requirements. Acceptance does not imply technical accuracy or reliability. Any use of the information in this report, including numerical data, is done at the risk of the user. These risks may include catastrophic failure of the device or infringement of patent or copyright laws. T...
متن کاملDual-axis Hole-drilling Espi Residual Stress Measurements
A dual-axis ESPI hole-drilling residual stress measurement method is described. It has the advantage of evaluating all the in-plane normal stress components with similar response to measurement errors, significantly lower than with single-axis measurements. Experimental tests were done on a stressed specimen, and the results supported theoretical expectations.
متن کاملResidual Stress Characterization in Orthotropic Plate by Combining Hole-drilling Method and Speckle Interferometry
Novel method for a determination of residual stresses in orthotropic composite plates based on local displacement measurements by electronic speckle-pattern interferometry is developed and verified. The values of hole diameter increments in principal residual stress directions serves as initial experimental deformation. The technique is based on analytical solution of S.G. Lekhnitsky, which des...
متن کاملEffect of the Hole-bottom Fillet Radius on the Residual Stress Analysis by the Hole Drilling Method
The hole drilling method is based on the measuring of the surface relaxed strains when a small hole is drilled on the examined component. From the relaxed strains, measured generally by using special strain gage rosette, the residual stresses is computed by using proper influence coefficients, provided also by the ASTM E837-08 standard. Such influence coefficients are obtained by numerical simu...
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تحقیقات مکانیک کاربردیجلد ۳، شماره ۴، صفحات ۲۹-۳۴
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