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Vibratory stresses

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0091857
EISBN: 978-1-62708-222-8
..., the physical root cause is the design of the mixer blade, which defined two bend areas that contained tensile residual stresses, tensile assembly stresses, and a notch-sensitive microstructure that added to the normal operating rotational and vibratory stresses. The net effect was a reduction in the life...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0091893
EISBN: 978-1-62708-218-1
... vehicle position without bearing rotation. Recommendations included improving methods of securing the vehicle during transportation to eliminate vibrations. Automotive components Fretting Vibratory stresses 52100 UNS G52986 Fretting wear The front-wheel outer angular-contact ball bearing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0089722
EISBN: 978-1-62708-217-4
.... Aircraft components Butt welds Design Elbows Fatigue cracking Lap welds Tubes Vibratory stresses Welded joints 321 UNS S32100 Joining-related failures Fatigue fracture The welded elbow assembly shown in Fig. 1 was part of a hydraulic-pump pressure line for a jet aircraft. The other end...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001228
EISBN: 978-1-62708-229-7
.... Flexing Turbine blades Vibratory stresses Fe-0.2C-13.9Cr Erosive wear Fatigue fracture In an electric power station, 7 turbine blades out of 112 blades, broke or cracked in a time period of 8 to 14 months after commencement of operation. The blades, in question were all located on the last...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0089730
EISBN: 978-1-62708-233-4
... it attached to the bellows assembly. Recommendations included increasing the thickness of the liners from 1.3 to 1.9 mm (0.050 to 0.075 in.) in order to damp some of the stress-producing vibrations. Bellows Expansion joints Liners Vibration Vibratory stresses Welded joints 321 UNS S32100 Joining...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0091897
EISBN: 978-1-62708-236-5
... pounding on the inner bearing race, causing final failure of the shaft surface. Recommendations included proper fitting of the shaft and bearing race to preventing movement of the bearing on the shaft. Also, the lock washer and locknut must be installed properly. Vibratory stresses 4140 UNS G41400...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001200
EISBN: 978-1-62708-221-1
.... Metallographic examination showed that they originated in ferrite clusters with granular graphite ( Figs. 9 and 10 ). Their existence therefore was promoted by the supercooled structure. The question of their cause must remain open. In this connection the thought of operational vibratory stress may occur...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001828
EISBN: 978-1-62708-241-9
... Stresses Due to Leakage from the Mechanical Seals Mechanical Stresses Induced during Two-Phase Flow Vibratory Stresses Induced during Normal Operation Results of Materials and Metallographic Examination Scanning Observations Chemical Analysis Mechanical Properties The failure...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003570
EISBN: 978-1-62708-180-1
... and Determination of Erosion Resistance , ASTM , 1970 , p 353 – 375 10. Morrow J.D. , “Cyclic Plastic Strain Energy and the Fatigue of Metals,” STP 378, Internal Friction, Damping, and Cyclic Plasticity , ASTM , 1965 , p 45 – 84 11. “Standard Method of Vibratory Cavitation Erosion Test...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001366
EISBN: 978-1-62708-215-0
... natural frequency, the resonant frequency decreases, generally resulting in reduction of the vibratory amplitude. It is apparent that as the cracks propagated in the impeller, the reduction in the vibratory amplitude offsets the effect of the increase in crack lengths such that the stress-intensity range...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003569
EISBN: 978-1-62708-180-1
... Fig. 1 Numerical simulation of a bubble collapse near a solid surface showing evolution of the bubble during collapse Fig. 2 Wear surface by cavitation of copper-base alloy in a lubricated gearbox. Courtesy of CETIM Fig. 3 Wear surface of Al 2 O 3 after vibratory...
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
... configuration. A number of solutions involving material selection and impeller redesign were recommended. Castings Chlorides, environment Propellers Repair welding Vibratory stresses 304L UNS S30403 Stress-corrosion cracking Fatigue fracture Background Visual Examination of General Physical...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001138
EISBN: 978-1-62708-231-0
... occurred. The cylinder rod/screw thread interface, because of its small fillet radius, has a high stress concentration factor. As the threads wear away, the clamping motion of the clevis is lessened and the compliance of the system increases. This adds additional stresses to the already highly stressed...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001852
EISBN: 978-1-62708-241-9
.... With the help of finite element modeling, they analyzed the material as well as the design and in-service application of the mold. They discovered that overconstraining the mold, while it was in service, caused excessive thermal stresses which accelerated crack initiation and propagation. Investigators also...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001851
EISBN: 978-1-62708-241-9
... Machinery , Sep 12–14 , 2000 ( University of Nottingham , U.K. ), pp. 581 – 90 . 9. Dewell D.L. and Mitchell L.D. : “ Detection of a Misaligned Disk Coupling Using Spectrum Analysis ,” J. Vib. Acoust. Stress Reliab. Des. (Trans. ASME) , 1984 , 106 , pp. 9 – 16 10.1115/1.3269161...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001747
EISBN: 978-1-62708-217-4
..., ( Figs. 1 , 2 , 3 , 4 ), cracks started on the leading edge at surface damage in the critical area—the zone between 4 and 10 in. from the tip of the blade. In this zone, normal tensile and vibratory bending loads are highest. Incorrect dressing and inadequate pre-flight inspection are the two main...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001569
EISBN: 978-1-62708-229-7
... attachment was the major contributor to the failure as it increased the stresses from soot blowing which may also have been vibratory in character. Remedial action included a visual inspection of attachments and repair. Wet fluorescent magnetic particle testing was performed on other tubes in the same...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006794
EISBN: 978-1-62708-295-2
... Vibratory Apparatus ,” G 32, Corrosion of Metals; Wear and Erosion , Vol 03.02 , Annual Book of ASTM Standards , ASTM International , 2019 30. “ Standard Test Method for Conducting Wet Sand/Rubber Wheel Abrasion Tests ,” G 105, Corrosion of Metals; Wear and Erosion , Vol 03.02 , Annual Book...
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
... frequency of a blade will depend on blade length as well as other material/geometric parameters. It is necessary, due to thermal stress and other considerations, to operate in the range of blade speeds where vibration problems can occur while the rotors get thermally stabilized. The speed on the turbine...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001181
EISBN: 978-1-62708-220-4
.... On the fracture surfaces in this region an irregularly formed zone was visible in the direction of the internal wall and a fibrous oriented fracture zone towards the external wall. The fracture was typical of stress-corrosion cracking in austenitic steels. Vanadium trichloride was present and tensile stresses...