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Shafts (power)

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Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001808
EISBN: 978-1-62708-180-1
... Abstract This article discusses failures in shafts such as connecting rods, which translate rotary motion to linear motion, and in piston rods, which translate the action of fluid power to linear motion. It describes the process of examining a failed shaft to guide the direction of failure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001430
EISBN: 978-1-62708-236-5
... to heat-affected zone cracking, residual stresses, the lower fatigue strength of the weld deposited metal, and weld defects. Repair welding Shafts (power) Weld defects Fe-0.6C Joining-related failures Fatigue fracture It is true to say that the construction of engineering plant...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001620
EISBN: 978-1-62708-229-7
... shaft. It was suggested that the surfaces be securely clamped together and that an in-service maintenance program be initiated to ensure that the tightness of the clamping bolts was verified regularly. Fretting fatigue Pulverized coal Shafts (power) 4340 UNS G43400 Transgranular fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0047823
EISBN: 978-1-62708-236-5
... short periods at power levels up to 3730 MW (5000 hp) and for longer periods at slightly above 2980 MW (4000 hp). Figure 1(a) shows the design of the shaft and the keyways. Two keys, spaced 180° apart, were expected to transmit the load so that an interference fit between shaft and coupling would not...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001764
EISBN: 978-1-62708-241-9
...-lbf) torque. Using b = −0.14 and S u = 650 MPa (94.3 ksi) (based on the measured material hardness), Fig. 14 shows the ratio of Design 1 life to Design 6 life as a function of the mean applied torque. Assuming that the power transmitted by the drive shaft is 250 kW (330 hp) and the input shaft...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001792
EISBN: 978-1-62708-241-9
... Abstract Two shafts that transmit power from the engine to the propeller of a container ship failed after a short time in service. The shafts usually have a 25 year lifetime, but the two in question failed after only a few years. One of the shafts, which carries power from a gearbox to the...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001353
EISBN: 978-1-62708-215-0
... Abstract A reversible four-way carbon steel flap valve in a thermal power station failed after 7 years of service. The flap had been fabricated by welding two carbon steel plates to both sides of a carbon steel forging. The valve was used for reversing the flow direction of seawater in the...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001368
EISBN: 978-1-62708-215-0
... Hydroelectric generators Shafts (power) Turbines 4140 UNS G41400 Fatigue fracture Selected References • Wulpi D.J. , Failures of Shafts , Failure Analysis and Prevention , Vol 11 , ASM Handbook , ASM International , 1986 , p 459 – 482 10.31399/asm.hb.v11.a0001808...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001511
EISBN: 978-1-62708-227-3
... the shaft. In the case of this shaft, a solution would have been to machine the core of the shaft to remove the brittle material or to use a tubular shaft. Forgings Shafts (power) Tankers (waterborne) Ultrasonic testing Low-carbon steel Fatigue fracture An LNG tanker experienced a...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001023
EISBN: 978-1-62708-214-3
...-power microscope examination of the spline of the shaft showed evidence of fretting wear debris; similar wear was observed on the splines of the mating bevel gear. It was concluded that the splines had failed by severe fretting wear. Fretting damage was also observed on the shaft face adjacent to the...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0047813
EISBN: 978-1-62708-229-7
... Abstract After being in service for ten years the ball-and-race coal pulverizer was investigated after noises were noted in it. Its lower grinding ring was attached to the 6150 normalized steel outer main shaft while the upper grinding ring was suspended by springs from a spider attached to the...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0059932
EISBN: 978-1-62708-236-5
... that the flaw signals were false and had happened when a portion of the beam struck the oily surface of the longitudinal oil hole. The problem was solved by removing the oil film from the longitudinal oil hole. Shafts (power) Ultrasonic testing Upset forgings 4118 UNS G41180 (Other, general...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0047100
EISBN: 978-1-62708-233-4
... fatigue cracks. Plungers Shafts (power) Stress concentration 4150 UNS G41500 Fatigue fracture Plunger shafts machined from 4150 steel bar stock were involved in a series of fatigue failures. The fractures consistently occurred at two different locations on the shafts–the shaft fillet (arrow...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001472
EISBN: 978-1-62708-221-1
... the failure it was recommended that the stress-raising effect of the holes be reduced by chamfering or preferably rounding-off the edges. Furthermore, rotation of the shaft should be prevented so that the radial holes were positioned on the opposite side of the shaft. Rotation Shafts (power...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0089774
EISBN: 978-1-62708-235-8
... welds Residual stress Shafts (power) Supports Undercutting Welded joints 1040 UNS G10400 Fatigue fracture An amusement ride in a shopping center failed when a component in the ride parted, permitting it to fly apart. The ride consisted of a central shaft supporting a spider of three arms...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001468
EISBN: 978-1-62708-221-1
... were found in all the shafts. Timely replacement was possible and the likelihood of serious accidents removed. Shafts (power) Ultrasonic testing Fe-0.3C Fatigue fracture This case concerns the failure of a shaft which resulted from reversed torsional stresses. The effect of this different...
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
... power transmission shaft . Eng. Fail. Anal. 9 , 457 – 467 ( 2002 ). 10.1016/S1350-6307(01)00033-4 5. Li Y.J. , Zhang W.F. , Tao C.H. : Fracture analysis of a castellated shaft . Eng. Fail. Anal. 14 , 573 – 578 ( 2007 ). 10.1016/j.engfailanal.2006.03.011 6...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0048250
EISBN: 978-1-62708-236-5
... Abstract A farm-silo hoist used as the power source for a homemade barn elevator failed catastrophically from destructive wear of the worm. The hoist mechanism consisted of a pulley attached by a shaft to a worm that, in turn, engaged and drove a worm gear mounted directly on the hoist drum...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047793
EISBN: 978-1-62708-217-4
... Abstract Failure of a case hardened steel shaft incorporated fuel pump in a turbine-powered aircraft resulted in damage to the aircraft. The disassembled pump was found to be dry and free of any contamination. Damage was exhibited on the pressure side of each spline tooth in the impeller and...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0046205
EISBN: 978-1-62708-225-9
... (power) Stress concentration Surface defects 1040 UNS G10400 Fatigue fracture The splined shaft shown in Fig. 1 was from a front-end loader used in a salt-handling area. The shaft broke after having been in service approximately 2 weeks while operating at temperatures near -18 °C (0 °F...