Although intensive research has been carried out to understand the fatigue behavior of steel notched components, under variable amplitude loading, no definite and general robust models have been derived so far. Therefore, every effort to augment the knowledge in this topic is welcomed. Within this context, existing variable amplitude data, derived by the authors for a notched low carbon pressure vessel steel (P355NL1) flat plate, is used to assess a local approach to fatigue. A linear damage summation framework, supported by elastoplastic finite element analyses, is used. Several variable amplitude loadings were selected and analyzed, using alternative configurations of kinematic hardening plasticity models (e.g., Chaboche’s model with distinct constants superposition). The predictions are assessed using available experimental data and data derived with simplified empirical elastoplastic tools. This paper highlights the difficulties of performing such elastoplastic analysis and compares the obtained results with those obtained using more classical tools for elastoplastic analysis (Glinka and Seeger–Heuler). It was found that fatigue predictions based on an elastoplastic finite element analysis, made using the Chaboche’s model, were significantly more accurate than predictions based on simplified elastoplastic analysis. These results have important practical relevance.

References

References
1.
European Committee for Standardization, 2002, “
EN 13445: Unfired Pressure Vessels
,” European Standard, Brussels.
2.
Miner
,
M. A.
, 1945, “
Cumulative Damage in Fatigue
,”
ASME J. Appl. Mech.
,
67
, pp.
A159
A169
.
3.
Pereira
,
H. F. G. S.
,
De Jesus
,
A. M. P.
,
Ribeiro
,
A. S.
, and
Fernandes
,
A. A.
, 2008, “
Fatigue Damage Behavior of a Structural Component Made of P355NL1 Steel Under Block Loading
,”
ASME J. Pressure Vessel Technol.
,
131
(
2
),
021407
.
4.
Pereira
,
H. F. S. G.
,
DuQuesnay
,
D. L.
,
De Jesus
,
A. M. P.
, and
Silva
,
A. L. L.
, 2009, “
Analysis of Variable Amplitude Fatigue Data of the P355NL1 Steel Using the Effective Strain Damage Model
,”
ASME J. Pressure Vessel Technol.
,
131
,
051402
.
5.
Pereira
,
H. F. G. S.
, 2006, “
Fatigue Behaviour of Structural Components Under Variable Amplitude Loading
,” M.Sc. thesis, FEUP, Porto, Portugal (in Portuguese).
6.
Morrow
,
J. D.
, 1965, “
Cyclic Plastic Strain Energy and Fatigue of Metals
,”
Int. Friction, Damping Cyclic Plasticity, ASTM STP
378
, pp.
45
87
.
7.
Glinka
,
G.
, 1985, “
Energy Density Approach to Calculation of Inelastic Strain-Stress Near Notches and Cracks
,”
Eng. Fract. Mech.
,
22
(
3
), pp.
485
508
.
8.
Seeger
,
T.
, and
Heuler
,
P.
, 1980, “
Generalised Application of Neuber’s Rule
,”
J. Test. Eval.
,
8
(
4
), pp.
199
204
.
9.
Swanson Analysis Systems, Inc., 2010, ansys, Houston, version 12.1.
10.
Ramberg
,
W.
, and
Osgood
,
W. R.
, 1943, “
Description of the Stress-Strain Curves by the Three Parameters
,” NACA Technical Note No. 902.
11.
De Jesus
,
A. M. P.
,
Ribeiro
,
A. S.
, and
Fernandes
,
A. A.
, 2006, “
Low Cycle Fatigue and Cyclic Elastoplastic Behaviour of the P355NL1 Steel
,”
ASME J. Pressure Vessel Technol.
,
128
(
3
), pp.
298
304
.
12.
Pereira
,
H. F. S. G.
,
De Jesus
,
A. M. P.
,
Fernandes
,
A. A.
, and
Ribeiro
,
A. S.
, 2008, “
Analysis of Fatigue Damage Under Block Loading in a Low Carbon Steel
,”
Strain
,
44
, pp.
429
439
.
13.
De Jesus
,
A. M. P.
, 2004, “
Validation of Procedures for Fatigue Assessment of Pressure Vessels
,” Ph.D. thesis, UTAD, Portugal (in Portuguese).
14.
Peterson
,
R. E.
, 1959, “
Notch Sensitivity
,”
Metal Fatigue
,
G.
Sines
, and
J. L.
Waisman
, eds.,
McGraw-Hill
,
New York
, pp.
293
306
.
15.
De Jesus
,
A. M. P.
,
Pereira
,
H. F. G. S.
,
Ribeiro
,
A. S.
, and
Fernandes
,
A. A.
, 2008, “
Cyclic Elastoplastic Analysis of Structures Concerning a Fatigue Assessment According to the Local Strain Approach: An Overview
,”
ASME J. Pressure Vessel Technol.
,
130
(
3
),
034503
.
You do not currently have access to this content.