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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001759
EISBN: 978-1-62708-241-9
... Abstract A bearing cup in a drive shaft assembly on an automobile was found to have failed. A detailed analysis was conducted using the QC story approach, which begins by proposing several possible failure scenarios then following them to determine the main root cause. A number of alternative...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001794
EISBN: 978-1-62708-241-9
... Abstract The drive shaft in a marine propulsion system broke, stranding a large vessel along the Canadian seacoast. The shaft was made from quenched and tempered low-alloy steel. Fractographic investigation revealed that the shaft failed under low rotating-bending variable stress. Fatigue...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001369
EISBN: 978-1-62708-215-0
... Abstract A crane long-travel worm drive shaft was found to be chipped during unpacking after delivery. Chemical analysis showed that the steel (EN36A with a case depth of 1 mm, or 0.04 inch did not meet specifications. Magnetic particle inspection revealed a crack on the side of the shaft...
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
... in a turbine-powered aircraft failed, resulting in damage to the aircraft. The pump is shown in Fig. 1(a) and (b) . Fig. 1 Fuel pump that failed by vibration and abrasion. (a) Configuration and dimensions (given in inches). (b) Splines on the drive shaft and in the impeller were worn away...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0091092
EISBN: 978-1-62708-224-2
... Abstract A 60.3 mm (2.375 in.) diam drive shaft in the drive train of an overhead crane failed. The part submitted for examination was a principal drive shaft that fractured near a 90 deg fillet where the shaft had been machined down to 34.9 mm (1.375 in.) to serve as a wheel hub. A 9.5 mm...
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
... Abstract High failure rates in the drive shafts of 40 newly acquired articulated buses was investigated. The drive shafts were fabricated from a low-carbon (0.45%) steel similar to AISI 5046. Investigators examined all 40 buses, discovering six different drive shaft designs across the fleet...
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Published: 01 December 2019
Fig. 2 Typical nonfailed Design 1 drive shaft. The circled area is called the shoulder area of the female spline. More
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Published: 01 December 2019
Fig. 3 Typical nonfailed Design 5/6 drive shaft. The circled area is called the shoulder area of the female spline. The cracks on the Design 5/6 drive shafts have been initiating in this shoulder area. More
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Published: 01 December 2019
Fig. 4 Failed drive shaft, Item 6, used for detailed optical and scanning electron microscopy (SEM) examination More
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Published: 01 December 2019
Fig. 5 Fracture surface of failed drive shaft, Item 6, used for detailed optical and SEM examination. Note ratchet marks around perimeter of fracture surface, indicating multiple fatigue initiation sites. More
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Published: 01 December 2019
Fig. 1 Exploded view of drive shaft More
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Published: 01 December 1993
Fig. 1 Keyway in drive shaft, as received More
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Published: 01 June 2019
Fig. 4 Drive shaft of maraging steel broke in fatigue at location indicated by arrow. More
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Published: 01 June 2019
Fig. 1 Drive shaft that fractured from fatigue in the spline area because of sharp fillets and machining marks at spline roots. Dimensions given in inches More
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Published: 01 December 2019
Fig. 1 An on-site inspection and identification of replaced drive shafts identified 6 visually discernable designs among the 28 drive shafts inspected. More
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Published: 01 December 2019
Fig. 9 Comparison of cross sections of the Design 1 and 6 drive shafts. The areas marked with circles are of particular concern because they differ in terms of fillet radii and cross-sectional area. More
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Published: 01 December 2019
Fig. 10 Geometry used in the finite-element analysis for the Design 1 drive shafts More
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Published: 01 December 2019
Fig. 11 Von Mises stress contours present in the Design 1 drive shafts subjected to 1356 N-m (1000 ft-lbf) torque. Maximum stress is 93.7 MPa (13.59 ksi) at the location indicated. More
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Published: 01 December 2019
Fig. 12 Von Mises stress contours present in the Design 6 drive shafts subjected to 1356 N-m (1000 ft-lbf) torque. Maximum stress is 132 MPa (19.10 ksi) at the location indicated. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048661
EISBN: 978-1-62708-225-9
... Abstract The drive wheel on a clutch-drive support assembly was slightly loose and caused clutch failures in service after 680,000 cycles. After failure, removal of the taper pin holding the drive wheel on the shaft was difficult, indicating that the pin was tight in the assembly. The taper pin...