Surface enhancement techniques such as shot peening are extensively used to increase the fatigue life of components in gas turbine engines. Due to the combined thermomechanical nature of the loading encountered within an engine, aeroengine designers have avoided incorporating the beneficial effects in their analysis. This can lead to overdesign and early retirement of critical engine components. A finite element modeling procedure is introduced that incorporates the shot peening residual stresses on a fir-tree turbine disk assembly. Unlike traditional equivalent loading approaches, the method models the actual impact of shots on the assembly and is the first time this approach is used to introduce peening residual stresses in turbine disks. In addition, the stability of these residual stresses in response to cyclic thermomechanical loadings at the contact interface is also studied. The results reveal that thermomechanical overload can nearly fully relax the shot peening residual stresses within the first cycle due to the combined effects of decreased material yield strength and plastic deformation. This work will enable aeroengine designers to assess critical surface treated components for structural integrity, optimal design, and residual life.

References

References
1.
Papanikos
,
P.
, and
Meguid
,
S. A.
,
1994
, “
Theoretical and Experimental Studies of Fretting-Initiated Fatigue Failure of Aeroengine Compressor Discs
,”
Fatigue Fract. Eng. Mat. Struct.
,
17
(
5
), pp.
539
550
.10.1111/j.1460-2695.1994.tb00253.x
2.
He
,
Q.
,
Xuan
,
H.-J.
,
Liao
,
L.-F.
,
Hong
,
W.-R.
, and
Wu
,
R.-R.
,
2012
, “
Simulation Methodology Development for Rotating Blade Containment Analysis
,”
J. Zhejiang Univ. Sci.
,
13
(
4
), pp.
239
259
.10.1631/jzus.A1100294
3.
Kanth
,
P. S.
,
1998
, “
2D & 3D FE Analysis of Fir-Tree Joints in Aeroengine Discs
,” M.Sc. thesis, University of Toronto, Toronto, Canada.
4.
Nicholas
,
T.
,
1999
, “
Critical Issues in High Cycle Fatigue
,”
Int. J. Fatigue
,
21
(
Suppl. 1
), pp.
221
231
.10.1016/S0142-1123(99)00074-2
5.
Cowles
,
B. A.
,
1989
, “
High Cycle Fatigue in Aircraft Gas Turbines—An Industry Perspective
,”
Int. J. Fatigue
,
80
(
2–3
), pp.
147
163
.10.1007/BF00012667
6.
Prevey
,
P.
,
Shepard
,
M. J.
, and
Smith
,
P. R.
,
2001
, “
The Effect of Low Plasticity Burnishing (LPB) on the HCF Performance and FOD Resistance of Ti–6Al–4V
,”
6th National Turbine Engine High Cycle Fatigue (HCF) Conference
,
Jacksonville, FL
, Mar. 5–8.
7.
Prevey
,
P.
,
1987
, “
The Measurement of Subsurface Residual Stress and Cold Work Distributions in Nickel Based Alloys
,”
Residual Stress in Design, Process and Materials Selection
,
W. B.
Young
, ed.,
ASME
,
Metals Park, OH
, pp.
11
19
.
8.
Ezeilo
,
A.
,
Webster
,
G.
,
Webster
,
P. J.
, and
Webster
,
P. S.
,
1993
, “
Comparison of Shot Peening Residual Stress Distributions in a Selection of Materials
,”
5th International Conference on Shot Peening
,
Oxford, UK
, Sept. 13–17, Paper No. 1993079, pp.
274
281
.http://www.shotpeener.com/library/detail.php?anc=1993079
9.
Meguid
,
S. A.
,
Shagal
,
G.
, and
Stranart
,
J. C.
,
1999
, “
Finite Element Modelling of Shot-Peening Residual Stresses
,”
J. Mater. Process. Technol.
,
92–93
, pp.
401
404
.10.1016/S0924-0136(99)00153-3
10.
Meguid
,
S. A.
,
Shagal
,
G.
,
Stranart
,
J. C.
, and
Daly
,
J.
,
1999
, “
Three-Dimensional Dynamic Finite Element Analysis of Shot-Peening Induced Residual Stresses
,”
Finite Elem. Anal. Des.
,
31
(
3
), pp.
179
191
.10.1016/S0168-874X(98)00057-2
11.
Meguid
,
S. A.
,
Shagal
,
G.
, and
Stranart
,
J. C.
,
2002
, “
3D FE Analysis of Peening of Strain-Rate Sensitive Materials Using Multiple Impingement Model
,”
Int. J. Impact Eng.
,
27
(
2
), pp.
119
134
.10.1016/S0734-743X(01)00043-4
12.
Meguid
,
S. A.
,
Shagal
,
G.
, and
Stranart
,
J. C.
,
2007
, “
Development and Validation of Novel FE Models for 3D Analysis of Peening of Strain-Rate Sensitive Materials
,”
ASME J. Eng. Mater. Technol.
,
129
(
2
), pp.
271
283
.10.1115/1.2712469
13.
Grasty
,
L. V.
, and
Andrew
,
C.
,
1996
, “
Shot Peen Forming Sheet Metal: Finite Element Prediction of Deformed Shape
,”
Proc. Inst. Mech. Eng., Part B
,
210
(
B4
), pp.
361
366
.10.1243/PIME_PROC_1996_210_129_02
14.
Levers
,
A.
, and
Prior
,
A.
,
1998
, “
Finite Element Analysis of Shot Peening
,”
J. Mater. Process. Technol.
,
80
, pp.
304
308
.10.1016/S0924-0136(98)00188-5
15.
Wang
,
T.
,
Platts
,
M. J.
, and
Levers
,
A.
,
2006
, “
A Process Model for Shot Peen Forming
,”
J. Mater. Process. Technol.
,
172
(
2
), pp.
159
162
.10.1016/j.jmatprotec.2005.09.006
16.
Zhuang
,
W. Z.
, and
Halford
,
G. R.
,
2001
, “
Investigation of Residual Stress Relaxation Under Cyclic Load
,” Int.
J. Fatigue
,
23
(
S1
), pp.
31
37
.10.1016/S0142-1123(01)00132-3
17.
Smith
,
D. J.
,
Farrahi
,
G. H.
,
Zhu
,
W. X.
, and
McMahon
,
C. A.
,
2001
, “
Experimental Measurement and Finite Element Simulation of the Interaction Between Residual Stresses and Mechanical Loading
,”
Int. J. Fatigue
,
23
(
4
), pp.
293
302
.10.1016/S0142-1123(00)00104-3
18.
Prevey
,
P.
,
2000
, “
FOD Resistance and Fatigue Crack Arrest in Low Plasticity Burnished IN718
,”
5th National Turbine Engine High Cycle Fatigue Conference
,
Chandler, AZ
, Mar. 7–9.
19.
Lu
,
J.
, and
Flavenot
,
J. F.
,
1987
, “
Use of a Finite Element Method for the Prediction of the Shot-Peened Residual Stress Relaxation During Fatigue
,”
3rd International Conference on Shot Peening
, (
ICSP3
),
Garmish-Partenkirchen, Germany
, September, Paper No. 1987105, pp.
391
398
.http://www.shotpeener.com/library/detail.php?anc=1987105
20.
Cao
,
W.
,
Khadhraoui
,
M.
,
Brenier
,
B.
,
Guedou
,
J. Y.
, and
Castex
,
L.
,
1994
, “
Thermomechanical Relaxation of Residual Stress in Shot Peened Nickel Base Superalloy
,”
Mater. Sci. Technol.
,
10
(
11
), pp.
947
954
.10.1179/mst.1994.10.11.947
21.
Meguid
,
S. A.
,
Shagal
,
G.
,
Stranart
,
J. C.
,
Liew
,
K. M.
, and
Ong
,
L. S.
,
2005
, “
Relaxation of Peening Residual Stresses Due to Cyclic Thermo-Mechanical Overload
,”
ASME J. Eng. Mater. Technol.
,
127
(
2
), pp.
170
178
.10.1115/1.1867986
22.
Zhou
,
Z.
,
Gill
,
A. S.
,
Qian
,
D.
,
Mannava
,
S. R.
,
Langer
,
K.
,
Wen
,
Y.
, and
Vasudevan
, V
. K.
,
2011
, “
A Finite Element Study of Thermal Relaxation of Residual Stress in Laser Shock Peened IN718 Superalloy
,”
Int. J. Impact Eng.
,
38
(
7
), pp.
590
596
.10.1016/j.ijimpeng.2011.02.006
23.
Chan
,
K. S.
,
Enright
,
M. P.
,
Golden
,
P. J.
,
Naboulsi
,
S.
,
Chandra
,
R.
, and
Pentz
,
A. C.
,
2012
, “
Probabilistic High-Cycle Fretting Fatigue Assessment of Gas Turbine Engine Components
,”
ASME J. Eng. Gas Turbines Power
,
134
(
6
), p.
062502
.10.1115/1.4005975
24.
Venkatesh
,
S.
,
1988
, “
Structural Integrity Analysis of an Aeroengine Disc
,” M.Sc. thesis, Cranfield Institute of Technology, Bedford, UK.
25.
Meguid
,
S. A.
,
Kanth
,
P. S.
, and
Czekanski
,
A.
,
2000
, “
Finite Element Analysis of Fir-Tree Region in Turbine Discs
,”
Finite Elem. Anal. Des.
,
35
(
4
), pp.
305
317
.10.1016/S0168-874X(99)00072-4
26.
U.S. FAA,
2010
, “
Metallic Materials Properties Development and Standardization (MMPDS)
,”
Federal Aviation Administration
,
Washington, DC
, Paper No. MMPDS-05.
27.
Hornbach
,
D.
, and
Prevey
,
P.
,
2002
, “
The Effect of Prior Cold Work on Tensile Residual Stress Development in Nuclear Weldments
,”
ASME J. Pressure Vessel Technol.
,
124
(
3
), pp.
359
365
.10.1115/1.1481035
28.
Lemaitre
,
J.
,
Chaboche
,
J.
, and
Maji
,
A.
,
1993
, “
Mechanics of Solid Materials
,”
J. Eng. Mech.
,
119
(
3
), pp.
642
643
.10.1061/(ASCE)0733-9399(1993)119:3(642.2)
29.
Vale
,
T.
,
d.
,
O.
,
Villar
,
G.
,
d.
,
C.
, and
Menezes
,
J. C.
,
2012
, “
Methodology for Structural Integrity Analysis of Gas Turbine Blades
,”
J. Aerosp. Technol. Manage.
,
4
(
1
), pp.
51
60
.10.5028/jatm.2012.04014311
30.
McClung
,
R. C.
,
2007
, “
A Literature Survey on the Stability and Significance of Residual Stresses During Fatigue
,”
Fatigue Fract. Eng. Mater. Struct.
,
30
(
3
), pp.
173
205
.10.1111/j.1460-2695.2007.01102.x
You do not currently have access to this content.