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crack-growth modeling

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Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001021
EISBN: 978-1-62708-214-3
... Simulation Tests The use of simulation specimens permitted real crack growth rate data to be determined for the configuration of interest. It also allowed accelerometer data from the crashed aircraft to be used in a crack growth model to establish a correlation between real fatigue progression markings...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003546
EISBN: 978-1-62708-180-1
.... Source: Ref 2 Fig. 10 Crack configurations considered in the fracture mechanics analysis of the turbine casing. Source: Ref 13 Fig. 11 Edge cracked plate under uniform tension showing the crack mouth displacement, Δδ, that is held constant during crack growth Fig. 12...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006781
EISBN: 978-1-62708-295-2
.../j.ijfatigue.2013.04.026 19. Findley K.O. , Evans J.L. , and Saxena A. , A Critical Assessment of Fatigue Crack Nucleation and Growth Models for Ni-and Ni, Fe-Based Superalloys , Int. Mater. Rev. , Vol 56 ( No. 1 ), 2011 , p 49 – 71 10.1179/095066010X12777205875796 20...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
.... The fracture process proceeds by crack growth toward the surface of the specimen, culminating in a region of slant fracture. Radial marks may or may not be present between the central fibrous zone and the shear zone near the surface. When the central fibrous region is examined at the microscale...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
... to the applied load. The fracture process proceeds by crack growth toward the surface of the specimen, culminating in a region of slant fracture. Radial marks may or may not be present between the central fibrous zone and the shear zone near the surface. When the central fibrous region is examined...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003516
EISBN: 978-1-62708-180-1
... , 1971 , p 230 – 242 27. Elber W. , Mathematical Modeling of Crack Growth Interaction Effects , Fatigue Crack Growth under Spectrum Loads , STP 595, American Society for Testing and Materials , 1976 , p 157 – 171 28. Bell P.D. and Wolfman A. , Equivalent Constant...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003512
EISBN: 978-1-62708-180-1
.... In this example, for an aircraft wing, the predicted crack growth and the actual crack growth based on measured crack growth rates for a surface flaw are compared to validate the model. Fig. 12 Damage-tolerance approach to life assessment. Curves indicate progression of damage from different nucleating...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001760
EISBN: 978-1-62708-241-9
... as shown in Fig. 15 . The resulting Von-misses stress around the hole is shown in Fig. 15 , which includes plastic deformations. The stress component in the x -direction (crack growth direction) and the maximum principal stress are shown in Fig. 16 . As seen in the figure, by considering the bolt model...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003537
EISBN: 978-1-62708-180-1
... also describes the general features of fatigue fractures in terms of crack initiation and fatigue crack propagation. brittle fracture crack initiation creep fracture deformation ductile fracture failure analysis fatigue crack growth fatigue crack propagation fatigue fracture fractography...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
... provides clues as to whether the material is high strength (smoother) or low strength (rougher) and whether fracture occurred as a result of cyclic loading. The surfaces from fatigue crack growth are typically smoother than monotonic overload fracture areas. The monotonic overload fracture of a high...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003564
EISBN: 978-1-62708-180-1
.... Miller G.R. , Keer L.M. , and Cheng H.S. , On the Mechanics of Fatigue Crack-Growth due to Contact Loading , Proc. R. Soc. (London) A: Math. Phys. Sci. , Vol 397 , 1985 , p 197 – 209 10.1098/rspa.1985.0011 26. Bower A.F. , The Influence of Crack Face Friction and Trapped...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001137
EISBN: 978-1-62708-228-0
... examined. The following questions were of particular concern: (i) whether there was any evidence of fatigue or whether the crack growth was purely of an SCC nature? (ii) if there was evidence of fatigue what was the cyclic stress amplitude? (iii) an estimate of the critical flaw size (from a fracture...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001028
EISBN: 978-1-62708-214-3
... secondary tearing from model III fatigue crack growth. 32×. Fig. 21 Higher-magnification views of Fig. 20 . 63×. Fig. 22 Higher-magnification views of Fig. 20 . 400×. The oil tank leaked because of a fatigue crack that followed a curved path around a spot weld. The fatigue crack...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001308
EISBN: 978-1-62708-215-0
... (not including the laboratory-induced fracture) were evident on the surface. Regions Ia and Ib appeared dull and smooth whereas region II had the shiny, crystalline appearance of cleavage fracture. No features indicating fatigue crack growth, such as beach marks, were evident in region I. River patterns...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001841
EISBN: 978-1-62708-241-9
... deflection amplitudes at near-resonance conditions can result in fatigue crack initiation and growth. A medical device manufacturer noted occasional strut fractures during balloon expansion tests associated with the validation of a new stent geometry. These stents had been subjected to typical...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001366
EISBN: 978-1-62708-215-0
... in the plane of maximum shear stress. Stage I growth occurs when the stress-intensity range is near threshold conditions. At higher stress-intensity ranges, stage II growth is observed, where the crack growth is normal to the applied stress. As a crack grows as the result of a component vibrating at its...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006767
EISBN: 978-1-62708-295-2
... elastic fracture mechanics analysis, with some mention of elastic-plastic fracture mechanics analysis. The article describes the probabilistic aspects of fatigue and fracture. Information on crack-growth simulation of the material is also provided. crack-growth simulation elastic-plastic fracture...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003517
EISBN: 978-1-62708-180-1
..., microstructural evaluations, the creep cavitation damage assessment, the oxide-scale-based life prediction, and high-temperature crack growth methods. coating evaluation creep cavitation damage assessment elevated-temperature failure gas turbine blade hardness testing high-temperature crack growth...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001786
EISBN: 978-1-62708-241-9
.... , Fatigue Crack Growth under Variable-Amplitude Loading , Fatigue and Fracture , Vol 19 , ASM Handbook , ASM International , 1996 , p 110 – 133 . 10.31399/asm.hb.v19.a0002356 The Short Bed Heavy Duty [ 1 ] conventional Lathe of Beco make housed at CWD, IGCAR was procured in the year 1991...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001144
EISBN: 978-1-62708-217-4
.... The approach offered a means of quantification of fracture features, providing for objective fractography. Digital Fractography Digital image analysis Helicopters Rotor blades Rotor blade metal Fatigue fracture Introduction Materials Analysis Crack Growth Rate Analysis Conclusions...