1-20 of 266 Search Results for

fatigue crack growth

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
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
.... 5 , showing fatigue striations indicating mode I fatigue crack progression from the top surface, apparently due to reverse bending of the sheet. (a) 385×. (b) 1925×. After the crack was opened, examination near the crack front showed that the direction of the crack growth in the lower zone...
Image
Published: 01 December 1992
Fig. 18 Log-log da/dN versus delta K fatigue crack growth-rate test results for 310 MPa (45 ksi) maximum stress and stress ratio of 0.73. The scatterband (two parallel lines) is for quenched and tempered martensitic steels from NCHRP 12–14. Note that the A517 grade, F, plate D, test results fell More
Image
Published: 30 August 2021
Fig. 24 Illustration of the three stages of subcritical fatigue crack growth. Adapted from Ref 16 More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001024
EISBN: 978-1-62708-214-3
..., hollow 6061-T651 aluminum alloy extrusion and 26 fiberglass “pockets” that provided the trailing-edge airfoil shape. Visual examination of the fracture surface of the aluminum extrusion indicated fatigue crack growth followed by ductile overload separation. Examination of the fatigue fracture region...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0047414
EISBN: 978-1-62708-233-4
... strength). This fatigue failure was the result of poor design, which incorporated a notch that acted as a stress raiser, leading to fatigue-crack growth. A generous radius was recommended to avoid similar failures. Radii Stress concentration Steel casting Fatigue fracture Figure 1 shows...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001027
EISBN: 978-1-62708-214-3
... cut from the yoke in the region of the cracking indicated that the failure was caused by fatigue-crack initiation and growth from severe corrosion damage to a pillow-block bolt hole. Corrosion occurred because of failure of the protection scheme. An upgraded corrosion protection scheme for the bolt...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001291
EISBN: 978-1-62708-215-0
... for fatigue crack growth during service. It was recommended that the damaged undercarriage struts be withdrawn from service pending further analysis and development of a repair technique. Crack propagation Military planes 35NCD16 Surface treatment related failures Intergranular fracture Fatigue...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001135
EISBN: 978-1-62708-219-8
... F higher than specified by the ASTM standards. The fatigue crack growth rate through this area was much faster than expected. All of these property changes resulted from increased carbon levels, higher yield strength, and larger than normal grain size. Bridges (structural) Grain size...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001531
EISBN: 978-1-62708-231-0
..., toughness, and ductility are mainly determined by the carbon content of wheel steels. The fatigue crack growth resistance is insensitive to composition and microstructure, while the fatigue crack initiation life increases with the decrease of austenite grain size and pearlite colony size. The dynamic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001136
EISBN: 978-1-62708-229-7
... alleviated the problem of slow, high cycle fatigue crack growth, at normal operating stresses in similar fans. Bending fatigue Centrifugal blowers Electric power generation Weld defects Low-carbon steel Fatigue fracture Joining-related failures Introduction Constraints of relatively high...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001025
EISBN: 978-1-62708-214-3
...-magnification view of the fracture surface of the wheel flange. Note contamination evidence on a large portion of the surface and the existence of two distinct regions. Region I is smooth, flat, and contains beach marks, all features that indicate fatigue crack growth. Region II is rough and dull and possesses...
Image
Published: 01 June 2019
Fig. 1 Fatigue failure of an anchor link. The arrow indicates the sharp edge that acted as the stress concentrator that led to fatigue-crack growth. More
Image
Published: 30 August 2021
Fig. 11 Fatigue failure of an anchor link. The arrow indicates the sharp edge that acted as the stress concentrator that led to fatigue crack growth. More
Image
Published: 30 August 2021
Fig. 9 Fractographic evaluation of multiple-site fatigue damage in a lower wing skin. The evaluation determined that the damage was caused by abusive machining marks that had accelerated the fatigue crack growth rate. (a) Location of cracks in the lower wing skin pocket. (b) Machine marks More
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003539
EISBN: 978-1-62708-180-1
.... For sufficiently high varying contact stress levels, this can result in subsurface initiation and initial growth of fatigue in shear ( Fig. 7 ). Under contact loading, as sliding increases, fatigue crack initiation sites shift to the surface ( Fig. 8 ). Rolling and sliding contact can cause fatigue damage...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006776
EISBN: 978-1-62708-295-2
...., see Fig. 16 in “ Micromechanisms of Monotonic and Cyclic Crack Growth ” in Fatigue and Fracture , Volume 19 of the ASM Handbook , 1996). Consequently, this division between stages of propagation was a natural one. However, many commercial alloys (notably most steels) typically do not exhibit...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001692
EISBN: 978-1-62708-229-7
.... Fig. 4 Fracture surface of failed bolt. Note the small area of final fracture and growth direction left to right. Magnification 2.4× Fig. 5 Bolt showing crack growth in fatigue until a critical length was reached. Fast fracture took place until the load dropped sufficiently to arrest...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001081
EISBN: 978-1-62708-214-3
... of the propagating cracks in all disks subjected to spin-pit testing. Fig. 14 Loading cycles used in spin-pit testing. (a) Constant-amplitude idle-max-idle duty cycle. (b) Variable-amplitude duty cycle. The constant-amplitude loading fatigue crack growth data for a bolt hole crack in disk 2...
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
..., creep-fatigue crack initiation and crack growth are the dominant damage mechanisms. Cracks have been found to occur in casings that have been removed from service after being in operation for 25 years or longer ( Ref 12 ). Thus, to ensure the integrity of the casings, it is necessary to inspect them...
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
... i + N p + N f Note that once a crack of engineering importance initiates, fast fracture may occur in a sudden and catastrophic manner. In that case, the component exhibited effectively no fatigue crack growth, and N p = 0. It is important to define failure for each component...