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Vibration

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0048169
EISBN: 978-1-62708-233-4
... and produce torsional vibrations. It was concluded that the two inner tabs had broken in fatigue as the result of cyclic loading that compressed and torsionally vibrated the spring. The fillets were replaced with slots to minimize stress concentration at the corners as a corrective measure. Aerospace...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001551
EISBN: 978-1-62708-233-4
... indicating rotational vibration fatigue. Keeping bolts tight solved this problem. In another case, grinding machines were unable to produce surfaces of uniform quality and smoothness on steel bearing products. Measurements showed that self-excited vibrations were created when particular steels were ground...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001578
EISBN: 978-1-62708-233-4
... Abstract Vibration analysis can be used in solving both rotating and nonrotating equipment problems. This paper presents case histories that, over a span of approximately 25 years, used vibration analysis to troubleshoot a wide range of problems. Current testing Fans Generators Motors...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047059
EISBN: 978-1-62708-217-4
...). Considerable vibration was created in the installation because of the design of the mechanical device used to transmit power to the governor. The pins were permitted to slide axially a small distance. Analysis (visual inspection, microscopic examination, and ductility measurements) supported the conclusion...
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
... that the combined effect of vibration and abrasive wear by sand and metal particles removed from the splines damaged the shaft. Case hardened spline teeth surface was recommended to increase resistance to wear and abrasion. Case hardening Wear resistance Case-hardened steel Abrasive wear The fuel pump...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c0048350
EISBN: 978-1-62708-227-3
... surfaces by electron microscopy at high magnification. Fatigue failures were concluded to be caused by vibrations resulting from normal steam flow at high steam demand. Too rigid support near the steam drum resulted in concentration of vibratory strain in the regions of failure. The method of supporting...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001082
EISBN: 978-1-62708-214-3
... constructed. It was determined that the blades failed by fatigue that had been accelerated by stress-corrosion cracking. The mechanism of failure was flow-induced vibration, in which the vortex-shedding frequencies of the blades were attuned to the natural frequency of the blade/hub configuration. A number...
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Published: 01 June 2019
Fig. 10 Blade Stress induced by vibration of Rotor More
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Published: 01 June 2019
Fig. 2 Checking wing vibration on plane resting on shaking machine. Transducer is in technician's hand. FFT analyzer is at right. Authors contend that vibration is an underrated contributor to substandard product quality. (Hewlett-Packard Co.) More
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Published: 01 June 2019
Fig. 5 a). View of fracture surface. Torsional vibration, fracture of a valve spring, origin of fracture marked by arrow. 10× b). Side view. Torsional vibration, fracture of a valve spring, origin of fracture marked by arrow. 10× More
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Published: 01 June 2019
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 by vibration in the presence of sand and metallic particles. Detail A: Enlarged view of failure area showing worn More
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Published: 01 January 2002
Fig. 17 Plot of wear versus frequency of fretting vibration More
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Published: 30 August 2021
Fig. 8 Fuel pump that failed by vibration and abrasion. (a) Configuration and dimensions (given in inches). OD, outside diameter. (b) Splines on the drive shaft and in the impeller were worn away by vibration in the presence of sand and metallic particles. Detail A: Enlarged view of failure More
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Published: 01 June 2019
Fig. 7 Broken cam of a rolling mill clutch with many vibrational fractures originating from a key-groove, Approx 1 2 × More
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Published: 01 June 2019
Fig. 9 Relation between the resistance to vibrational fracture and the tensile strength (values taken from 6)). More
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Published: 01 June 2019
Fig. 10 Vibrational fracture of a screw in the first supporting thread. Fractue, 1× b). Longitudinal section, etched in copper ammonium chloride. 2× More
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Published: 01 June 2019
Fig. 12 Bending vibrational fracture which had started from a sharp key-groove. 1× More
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Published: 01 June 2019
Fig. 13 Broken rear axle. Fracture with advanced stage of vibrational fracture. 1 2 × b). Sharp transition in cross-section with turning grooves at the origin of the fracture. 1× More
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Published: 30 August 2021
Fig. 9 Campbell diagram for a compressor blade showing various vibrational-mode frequencies of the blade (horizontal lines) and the frequency-versus-speed curve for wakes created by the upstream stationary vanes (black diagonal line). TE, trailing edge More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001232
EISBN: 978-1-62708-233-4
..., leaf springs, engine rods, wing struts, bearings, gears, and more – can occur, seemingly without cause, due to vibrational fracture. Vibrational fractures begin as cracks that form under cyclic loading at nominal stresses which may be considerably lower than the yield point of the material...