Abstract

The principle of an interferometric strain/slope rosette (ISSR) is based on interference of laser beams reflected from three microindentations on a specimen surface. The ISSR can simultaneously measure the in-plane strains and the out-of-plane slopes. Ring-core cutting is a mechanical stress relief method. When used with the ISSR technique for residual stress measurement, the ring core can be made much smaller than used with the resistance strain rosette. Thus, more localized residual stresses can be measured. The theories of the ISSR/ring-core cutting method are described in this paper. Both mechanical and finite element models are developed for the incremental ring-core cutting process with the application of the ISSR technique. The stress-strain coefficients of the ISSR/ring-core method are calculated and nondimensionalized for general applications. A test example is given to demonstrate how residual stress distribution is determined by using the stress-strain coefficients and the ISSR data.

1.
Keil
,
S.
, 1992, “
Experimental Determination of Residual Stresses With the Ring-Core Method and an On-line Measuring System
,”
Exp. Tech.
0732-8818,
16
(
5
), pp.
17
24
.
2.
Siiriäinen
,
J.
,
Gripenberg
,
H.
, and
Hänninen
,
H.
, 2000, “
Design and Implementation of Ring-Core Method for Residual Stress Measurement
,” The Sixth International Conference on Residual Stresses ICRS-6, Oxford, UK, pp.
996
1003
.
3.
Hornbach
,
D.
, and
Prevéy
,
P.
, 1998, “
Development of Machining Procedures to Minimize Distortion During Manufacture
,”
ASM Proceedings of 17th Heat Treating Society Conference and Exposition: Heat Treating
,
ASM International
,
Metals Park, OH
, pp.
13
18
.
4.
Ajovalasit
,
A.
,
Petrucci
,
G.
, and
Zuccarello
,
B.
, 1996, “
Determination of Nonuniform Residual Stresses Using the Ring-Core Method
,”
ASME J. Eng. Mater. Technol.
0094-4289,
118
(
2
), pp.
224
228
.
5.
Zuccarello
,
B.
, 1996, “
Optimization of Depth Increment Distribution in the Ring-Core Method
,”
J. Strain Anal. Eng. Des.
0309-3247,
31
(
4
), pp.
251
258
.
6.
Shankar
,
K.
,
Xie
,
H. M.
,
Wei
,
R. Y.
,
Asundi
,
A.
, and
Boay
,
C. G.
, 2004, “
A Study on Residual Stresses in Polymer Composites Using Morié Interferometry
,”
Adv. Comput. Math.
1019-7168,
13
(
3–4
), pp.
237
253
.
7.
Tjhung
,
T.
, and
Li
,
K.
, 2003, “
Measurement of In-Plane Residual Stresses Varying With Depth by the Interferometric Strain/Slope Rosette and Incremental Hole-Drilling
,”
ASME J. Eng. Mater. Technol.
0094-4289,
125
(
2
), pp.
153
162
.
8.
Bell
,
J. F.
, 1956, “
Determination of Dynamic Plastic Strain Through the Use of Diffraction Grating
,”
J. Appl. Phys.
0021-8979,
27
(
10
), pp.
1109
1113
.
9.
Pryor
,
T. R.
, and
North
,
W. P. T.
, 1971, “
The Diffractographic Strain Gage
,”
Exp. Tech.
0732-8818,
1
(
12
), pp.
565
568
.
10.
Sharpe
, Jr.,
W. N.
, 1968, “
The Interferometric Strain Gage
,”
Exp. Tech.
0732-8818,
8
(
4
), pp.
164
170
.
11.
Sharpe
, Jr.,
W. N.
, 1982, “
Applications of the Interferometric Strain/Displacement Gauge
,”
Opt. Eng.
0091-3286,
21
, pp.
483
488
.
12.
Li
,
K.
, 1996, “
Out-of-plane Displacement Derivative Measurements Using Interferometric Strain/Slope Gage
,”
ASME J. Appl. Mech.
0021-8936,
63
(
4
), pp.
1033
1038
.
13.
Li
,
K.
, 1997, “
Interferometric Strain/Slope Rosette for Static and Dynamic Measurements
,”
Exp. Tech.
0732-8818,
37
(
2
), pp.
111
118
.
14.
Li
,
K.
, 1997, “
Application of Interferometric Strain Rosette to Residual Stress Measurements
,”
Opt. Laser Technol.
0030-3992,
27
(
1
), pp.
125
136
.
15.
Schajer
,
G. S.
, 1981, “
Application of Finite Element Calculations to Residual Stress Measurements
,”
ASME J. Eng. Mater. Technol.
0094-4289,
103
(
2
),
157
163
.
16.
Cook
,
R. D.
,
Malkus
,
D. S.
, and
Plesha
,
M. E.
, 1989,
Concepts and Applications of Finite Element Analysis
, 3rd ed.,
Wiley
,
New York
, Chap. 10.
17.
Zienkiewicz
,
O. C.
, 1977,
The Finite Element Method
, 3rd. ed.,
McGraw-Hill
,
New York
, Ch 15.
18.
Ren
,
W.
, and
Li
,
K.
, 2007, “
Application of Minature Ring-Core and Interferometric Strain/Slope Rosette to Determine Residual Stress Distribution with Depth—Part II: Experiments
,”
ASME J. Appl. Mech.
0021-8936,
74
, pp.
307
314
.
19.
Ren
,
W.
,
Li
,
K.
, and
Feng
,
Z.
, 2005, “
Ultrasonic Welding Stress Distribution Measured With Optical Rosette/Ring-Core Method
,” SAE Congress, Apr., SP-1957, Experiments in Automotive Engineering - Optical Techniques, pp.
141
144
.
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