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Accurate measurement of residual stress on any steel using the centre hole method

Accurate measurement of residual stress on any steel using the centre hole method,10.1111/j.1475-1305.1976.tb00194.x,Strain,E. M. BEANEY

Accurate measurement of residual stress on any steel using the centre hole method   (Citations: 31)
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Journal: Strain , vol. 12, no. 3, pp. 99-106, 1976
Cumulative Annual
    • ...The introduction of high-speed cutters [49] and abrasive machining [50] in the 1970s and 1980s, significantly advanced both these objectives...
    • ...For example, finite element calculations enabled stress/strain relationships to be determined for the hole-drilling method [27, 50] with much greater accuracy than available through the previous experimental calibrations...

    G. S. Schajer. Relaxation Methods for Measuring Residual Stresses: Techniques and Opp...

    • ...In measuring residual stress of 70% yield strength by the holedrilling technique (Beaney, 1976) an overestimation of 15% can be given by the plasticity effect...

    Shang Hyon Shin. FEM analysis of plasticity-induced error on measurement of welding res...

    • ...The method for recovering the residual stress involves obtaining experimentally from each specimen a number of coordinate pairs (xi; (rx) t, and then fitting a regression of the curve type in eq (1)...
    • ...(1) Attach a strain gage to the area of interest, oriented in the desired direction...
    • ...Considering at first the twodimensional uniaxial stress case, certain boundary conditions must govern the shape of the residual-stress profile as modified by introduction of a transverse trench: (1) axial Fig. 2--This schematic diagram illustrates the principle of the multiple trenching technique, showing as areas the relaxed strains measured from a series of three trenches...
    • ...Accuracy may be optimized by noting the following: (1) A maximum range of distances and points provides a more reliable regression...

    I. F. Schwartz. Multiple trenching: a simple self-calibrating method of residual-stres...

    • ...For a 'counter-clockwise' rosette, 9 the quantity -C in eq (2) becomes C. The Cartesian stresses calculated by solving eq (2) can be used to determine the principal stresses, using...
    • ...For a 'counter-clockwise' rosette, 9 the quantity -C in eq (2) becomes C. The Cartesian stresses calculated by solving eq (2) can be used to determine the principal stresses, using...
    • ...Equations (1) and (2) are assumed still to apply, providing that gages 1 and 3 are aligned along...
    • ...In this case, C is an independent calibration constant, not related to A or B. The use of eq (1) was suggested for hole-drilling applications by Bert et al. 6'7 and subsequently by Prasad et al. 8 However, it is shown here that eqs (1) and (2) are not valid for hole drilling in an orthotropic material because the displacement field around a hole in a stressed orthotropic plate does not have a simple trigonometric form...
    • ...Assuming only linear elasticity, the matrix approach used in eq (2) can be generalized so that it accurately applies to an orthotropic material...
    • ...In the orthotropic case, eq (2) generalizes to...
    • ...Table 1 illustrates how the compliance values in eq (22) for an orthotropic material deviate from the trigonometric values expected from eq (2)...
    • ...Their value of C is smaller than expected from c~z in eqs (2) and (22)...
    • ...These values are the same as those listed in Table 5. Column 5 lists the stresses calculated using eq (2) with the 'longitudinal' A, B and C values from column 2. These calculated stresses are similar to those from eq (22) in column 4. Column 6 lists the stresses calculated using eq (2) with the 'transverse' A, B and C values from column 3. These calculated stresses greatly differ from the expected values, and...
    • ...These values are the same as those listed in Table 5. Column 5 lists the stresses calculated using eq (2) with the 'longitudinal' A, B and C values from column 2. These calculated stresses are similar to those from eq (22) in column 4. Column 6 lists the stresses calculated using eq (2) with the 'transverse' A, B and C values from column 3. These calculated stresses greatly differ from the expected values, and...
    • ...332 �9 December 1994 TABLE 6--STRESSES COMPUTED USING EQS (2) AND (22) FOR A 1.00-MPa APPLIED LONGITUDINAL STRESS...
    • ...(2) Equation (22) provides theoretically exact residual-stress solutions for a wide range of linear-elastic orthotropic materials...

    G. S. Schajeret al. Residual-stress measurement in orthotropic materials using the hole-dr...

    • ...4-6 where the elastically calculated stress as determined by eq (4) is ,plotted against the measured stress calculated from eqs (1) and (2) and also against the percent error in the measured stress for each of the three nozzle sizes...
    • ...28 �9 January 1981 tests were performed using various orientations of the rosette-gage elements, The results of these tests are shown 3o ~ in Fig. 15 where the calculated stress as determined by eq (4) is plotted against the measured stress calculated from eqs (1) and (2) and against the percent error in the 20 measured stress...

    Julian E. Bynum. Modifications to the hole-drilling technique of measuring residual str...

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