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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0047220
EISBN: 978-1-62708-220-4
... (1600 °F), and oil quenched. The larger gear was tempered to 200 to 240 HB, and the smaller gear to 240 to 280 HB. These hardness levels provided the desired resistance to shock and wear yet retained high strength and good ductility. No further gear failures occurred. Casting Design The shape...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0048026
EISBN: 978-1-62708-224-2
... broken wires and fraying of the fiber core ( Fig. 1a ). The construction and mechanical properties of the rope were as specified. Fig. 1 Steel wire rope, used on a cleaning-line crane, that failed from fatigue resulting from vibration caused by shock loading. (a) Section of the wire rope adjacent...
Image
Published: 01 December 2019
Fig. 5 Time history of the maximum stress responding to the shock loading on the shaft More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001763
EISBN: 978-1-62708-241-9
... deformation of the spline teeth. Magnification: 200× Fig. 5 Time history of the maximum stress responding to the shock loading on the shaft Abstract This paper presents a failure analysis of a reverse shaft in the transmission system of an all-terrain vehicle (ATV). The reverse shaft...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0047846
EISBN: 978-1-62708-218-1
... was removed in an effort to reduce cost and hence the shaft was subjected to increased vibration and shock loading. Insufficient fatigue limit of the shaft was revealed by fatigue testing of the shafts taken from stock in a rotating-beam machine. As a corrective measure, the fatigue limit of shafts...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001295
EISBN: 978-1-62708-215-0
... to dynamic loading. It was concluded that dynamic shock loading transmitted by the target during unsteady flight conditions was the major cause of failure. Recommendations emphasized the need for a suitable shock absorber to be fitted at the constant-tensioning device of the winch system. Selected...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048273
EISBN: 978-1-62708-225-9
... failed by tooth-bending fatigue. Spalling was also noted on the pressure (drive) side of each tooth at the toe end which indicated some mechanical misalignment of the pinion with the mating gear that caused the cyclic shock load to be applied to the toe ends of the teeth. Cyclic loads Gear teeth...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006830
EISBN: 978-1-62708-329-4
... the failure analysis of wire ropes and the failure of wire ropes due to corrosion, a common cause of wire-rope failure. Further, it reviews the characteristics of shock loading, abrasive wear, and stress-corrosion cracking of a wire rope. Then, the article provides information on the failure analysis...
Image
Published: 01 June 2019
Fig. 1 Steel wire rope, used on a cleaning-line crane, that failed from fatigue resulting from vibration caused by shock loading. (a) Section of the wire rope adjacent to the fracture. Approximately 1 1 2 ×. (b) Unetched longitudinal section of a wire from the rope showing fatigue More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001196
EISBN: 978-1-62708-224-2
.... The metallographic examination revealed a rather coarse bainitic structure as shown in Fig. 2 , which is an indication that the resistance of the steel to withstand shock loads was low. Shock loads are unavoidable in the operation of a fork lifter. Impact tests (Charpy-V-Notch) on test specimens with square cross...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047187
EISBN: 978-1-62708-225-9
... steel and were case hardened by pack carburizing. Gear Failure One of the gears showed severe wear on the side of the teeth that came into contact with the opposing gear during engagement ( Fig. 1 ). This contact point is where high shock loads had to be accommodated at large differences...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001461
EISBN: 978-1-62708-224-2
... in service by overload or shock load conditions. The stress concentration effect of the sharp corner served to increase the stresses developed in this region to a magnitude which sufficed to initiate a crack. It is evident that when the fatigue crack had reached a certain depth, the notch so formed served...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047315
EISBN: 978-1-62708-225-9
... caused failure of such a large flanged nut. Because gray iron has little ductility and is susceptible to fracture by shock loads in bending, the roughly symmetrical array of radial cracks leading from the main fracture face suggested that the flange had been subjected to bending. The evidence...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001449
EISBN: 978-1-62708-221-1
... of the low notch-ductility the plates were liable to fail in a brittle manner at a location where a stress-raiser, such as a crack, was present, particularly under the conditions of shock loading usually experienced by excavating machinery. The importance of the stress-raiser in determining the location...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001460
EISBN: 978-1-62708-221-1
... rapid manner without mutual polishing of the surface. The resulting shock load led to rapid failure of one of the welded joints in the other tie bar; that shown in Figure 2 . Subsequent to this mishap the corresponding welds in two other excavators of similar design were examined by ultrasonic...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001292
EISBN: 978-1-62708-215-0
... Australian Air Force; it carries (and provides damping of) the vertical loads experienced by the wheels during touchdown and ground roll, transmitting those loads to the airframe. It also carries side loads. A crack was detected in one arm of the right-hand horizontal brace of the nose landing gear shock...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001309
EISBN: 978-1-62708-215-0
... are transmitted through the springs. A significant portion of the total vehicle weight of this motorcycle is unsprung, since the cargo box and its frame is connected below the spring/shock units. This modified design allows unnecessary and excessive loading at the swing arm plates. The cracking in the upper...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001018
EISBN: 978-1-62708-217-4
..., and indicative of a shock type of failure pattern. Closer examination, however, showed a fatigue crack at one corner. At this point, there was definite evidence of progression and oxidation. It was concluded that the corner in question was subjected to repeated brinelling resulting from normal landing loads...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001473
EISBN: 978-1-62708-229-7
... examination of the damaged parts and they also concluded that the failure occurred under conditions of shock loading. They calculated, from the damage to the gearing teeth, that the duration of the shock must have been of the order of 0–0087 seconds. It is interesting to note in this connection that V. W...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001471
EISBN: 978-1-62708-221-1
... under impact but not under slow loading. The material of the body of the hook deformed satisfactorily when the load was applied slowly, but it also tended to behave in a notch-brittle manner under shock loading conditions. It was evident from these tests that the fracture of this hook had not resulted...