Fatigue and Fracture of Engineering Materials and Structures
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NUMERICAL MODELLING OF A 3D RAIL RCF ‘SQUAT’‐TYPE CRACK UNDER OPERATING LOAD
Fatigue and Fracture of Engineering Materials and Structures - Tập 21 Số 8 - Trang 923-935 - 1998
The analysis is based on the 3D FE model of the rail Rolling‐Contact‐Fatigue
(RCF) ‘squat’‐type crack, which tends to be common in tracks with high‐speed
passengers and mixed traffic. The model incorporates the section of rail and a
wheel of real geometry, in which the wheel is rolling over the running band of
rail containing the ‘squat’‐type crack. The state of stress in the vicinity of
the crack...
The effect of compression stresses, stress level and stress order on fatigue crack growth of multiple site damage
Fatigue and Fracture of Engineering Materials and Structures - Tập 35 Số 10 - Trang 903-917 - 2012
ABSTRACTStructural components are generally subjected to a wide stress spectrum
over their lifetime. Service loads are accentuated at the areas of stress
concentration, mainly at the connection of components. When there is a critical
level of multiple site damage at connections, cracks link up to form a large
crack which abruptly reduces the residual strength of the damaged structural
member. Ther...
Mechanism modelling of shot peening effect on fatigue life prediction
Fatigue and Fracture of Engineering Materials and Structures - Tập 33 Số 2 - Trang 116-125 - 2010
ABSTRACTA new mechanism modelling is proposed in this paper to explain the shot
peening effect on fatigue life predictions of mechanical components. The
proposed methodology is based on the crack growth analysis of shot peened
specimens, which are affected by the interaction of surface roughness and
residual stress produced during the shot peening process. An asymptotic stress
intensity factor sol...
Fatigue design of structures under thermomechanical loadings
Fatigue and Fracture of Engineering Materials and Structures - Tập 25 Số 12 - Trang 1199-1206 - 2002
ABSTRACTThis paper presents a global approach to the design of structures that
experience thermomechanical fatigue loading, which has been applied successfully
in the case of cast‐iron exhaust manifolds. After a presentation of the design
context in the automotive industry, the important hypotheses and choices of this
approach, based on a thermal 3D computation, an elastoviscoplastic constitutive
...
A new energy‐based isothermal and thermo‐mechanical fatigue lifetime prediction model for aluminium–silicon–magnesium alloy
Fatigue and Fracture of Engineering Materials and Structures - Tập 36 Số 12 - Trang 1323-1335 - 2013
ABSTRACTIn this paper, a new fatigue lifetime prediction model is presented for
the aluminium–silicon–magnesium alloy, A356.0. This model is based on the
plastic strain energy density per cycle including two correction factors in
order to consider the effect of the mean stress and the maximum temperature. The
thermal term considers creep and oxidation damages in A356.0 alloy. To calibrate
the mode...
CASTING DEFECTS AND THE FATIGUE BEHAVIOUR OF AN ALUMINIUM CASTING ALLOY
Fatigue and Fracture of Engineering Materials and Structures - Tập 13 Số 3 - Trang 213-227 - 1990
Abstract— The fatigue properties of un‐notched polished specimens of an
aluminium casting alloy have been measured for various heat‐treatment conditions
and at various mean stresses. The relation between fatigue life and alternating
stress is insensitive to heat‐treatment and, apparently, to mean stress. It was
observed that failure initiated at interdendritic shrinkage defects: evidence of
classi...
A NON‐LINEAR CONTINUOUS FATIGUE DAMAGE MODEL
Fatigue and Fracture of Engineering Materials and Structures - Tập 11 Số 1 - Trang 1-17 - 1988
Abstract— ‐A non‐linear cumulative fatigue damage model proposed previously is
applied to different steels and various loading situations, including two‐level
tests and block‐programs. Its ability to describe all the main features of
fatigue damage and the ease of its practical use for engineers are discussed and
several examples cited. The relationship with other formulations are pointed out
toge...
ESTIMATION OF TORSIONAL FATIGUE STRENGTH OF MEDIUM CARBON STEEL BARS WITH A CIRCUMFERENTIAL CRACK BY THE CYCLIC RESISTANCE‐CURVE METHOD
Fatigue and Fracture of Engineering Materials and Structures - Tập 21 Số 9 - Trang 1067-1076 - 1998
Near‐threshold fatigue crack propagation tests were performed on
circumferentially precracked round bars of a medium carbon steel under torsional
loading. The crack propagation rate decreased with crack extension, because of
the shear contact of crack faces. The crack propagation rate without the
influence of crack‐surface contact was determined by extrapolating to zero crack
extension the relatio...
AN UNDERSTANDING OF FATIGUE THRESHOLDS THROUGH THE INFLUENCE OF NON‐METALLIC INCLUSIONS IN STEEL
Fatigue and Fracture of Engineering Materials and Structures - Tập 4 Số 1 - Trang 79-95 - 1981
Abstract —In recent years the low fatigue growth rate regime has been the
subject of extensive study revealing its complex and often seemingly
inconsistent nature. The value of alternating stress intensity at threshold
ΔKTh) is sensitive to a range of variables which include mean stress, stress
history, monotonie and cyclic yield strength, grain size and environment. A
degree of coherency may be a...
A FATIGUE CRACK CLOSURE MECHANISM IN TITANIUM
Fatigue and Fracture of Engineering Materials and Structures - Tập 1 Số 1 - Trang 135-148 - 1979
Abstract— Fatigue crack closure in commercial titanium has been investigated by
examining the crack profile using a two‐stage replica technique and by
monitoring the crack raouth opening displacement. The replicas show that when
closure occurs the crack does not close back from the crack tip but at discrete
contact points along the crack faces. The observed closure mechanism is
therefore quite dif...
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