Crack initiation and propagation process of fatigue test in semicircular notched plates at elevated temperature were conducted under strain-controlled condition in order to study the crack initiation/propagation/coalescence process and load decrease in structure having stress concentration. Test specimens made of SUS304 stainless steel are tested at 550°C and the geometry of the semicircular notched plate specimens are changed by diameter size of the circular notch in both of single-notched specimens and double-notched specimens. Photographs in all cycles were recorded to investigate crack initiation/propagation/coalescence as a function of number of applied cycle. The typical crack process is predicted by using the simplified method, namely, stress redistribution locus method as well as Neuber’s formula.

Issue Section:
Materials and Fabrication
Keywords:
fatigue cracks, fatigue testing, geometry, plates (structures), stainless steel, temperature distribution
Topics:
Cycles, Fatigue testing, Fracture (Materials), Stress, Temperature
1.
Watanabe
,
O.
, and
Koike
,
T.
, 2006, “
Creep-Fatigue Life Evaluation Method for Perforated Plate at Elevated Temperature
,”
ASME J. Pressure Vessel Technol.
0094-9930,
128
, pp.
17
–
24
.
Crossref
Search ADS
 
2.
Watanabe
,
O.
,
Bubphachot
,
B.
,
Kawasaki
,
N.
, and
Kasahara
,
N.
, 2007, “
Fatigue Strength Evaluation of Perforated Plate at Elevated Temperature Using Stress Redistribution Locus Method
,”
ASME
Paper No. CREEP2007-26698.
3.
Bubphachot
,
B.
,
Watanabe
,
O.
,
Kawasaki
,
N.
, and
Kasahara
,
N.
, 2007, “
Creep Effect on Fracture Strength of Perforated Plate at Elevated Temperature Using Stress Redistribution Locus Method
,”
ASME
Paper No. CREEP2007-26702.
4.
Neuber
,
H.
, 1961, “
Theory of Stress Concentration for Shear Strained Prismatic Bodies With Arbitrary Nonlinear Stress-Strain Law
,”
ASME Trans. J. Appl. Mech.
0021-8936,
28
, pp.
544
–
550
.
Crossref
Search ADS
 
5.
Kasahara
,
N.
, 2001, “
Strain Concentration at Structural Discontinuities and Its Prediction Based on Characteristics of Compliance Change in Structures
,”
JSME Int. J., Ser. A
1340-8046,
44
(
3
), pp.
354
–
361
.
Crossref
Search ADS
 
6.
Shimakawa
,
T.
,
Watanabe
,
O.
,
Kasahara
,
N.
,
Kobayashi
,
K.
,
Takizawa
,
M.
, and
Asada
,
S.
, 2002, “
Creep-Fatigue Life Evaluation Based on Stress Redistribution Locus (SRL) Method
,”
JPVRC Symposium 2002
, pp.
87
–
95
.
7.
High Pressure Institute of Japan
, 2005, “
Creep-Fatigue Life Evaluation Scheme for Ferritic Component at Elevated Temperature
,” Report No. HPIS C 107 TR 2005.
8.
Marriott
,
D. L.
, and
Seshadri
,
R.
, 1994, “
Simplified Analysis Methods for Elevated Temperature Life Assessment
,”
Technology for 90’s
,
ASME
,
New York
, Chap. 10.
9.
Seshadri
,
R.
, 1991, “
The Generalized Local Stress Strain (GLOSS) Analysis—Theory and Applications
,”
ASME J. Pressure Vessel Technol.
0094-9930,
113
, pp.
219
–
227
.
Crossref
Search ADS
 
10.
Papirno
,
R.
, and
Parker
,
B. S.
, 1973, “
An Automatic Flash Photomicrographic System for Fatigue Crack Initiation Studies
,”
ASTM Spec. Tech. Publ.
0066-0558,
519
, pp.
98
–
108
.
11.
1992, Japan Industrial Standard, Z 2279, Method of High Temperature Low Cycle Fatigue Testing for Metallic Materials.
12.
Watanabe
,
O.
, 2001, “
Viscoplasticity Model Using Framework of Crystal Plasticity and Its Application of High Temperature Structural Analysis
,”
Proceedings of the Seventh International Conference on Creep and Fatigue at Elevated Temperature (CREEP7)
, pp.
631
–
635
.
13.
Wada
,
Y.
,
Kawakami
,
Y.
, and
Aoto
,
K.
, 1993, “
A Statistical Approach to Fatigue Life Reduction for SUS 304, 316 and 321 Austenite Stainless Steels
,”
ASME PVP
,
123
, pp.
37
–
42
.
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