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Vibration

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Published: 01 December 2004
Fig. 8.31 Comparison of vibration damping performance for selected aluminum MMCs and other structural alloys. Frequency range, 0.01 Hz to 5 kHz; impacting force, approximately 49 lbf (220 N); specimen size, 9.4 × 1.2 × 0.4 in. (240 × 30 × 10 mm). The specimen is suspended in air and impacted More
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Published: 01 December 2008
Fig. 2.12 The energy and the heat capacity of the thermal vibration of a crystal. (a) The thermal vibration energy of a crystal. (b) The heat capacity of thermal vibration More
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Published: 01 December 2008
Fig. 2.13 Distribution of vibration energy. Most of oscillators are on the level of n = 0 or 1 at a low temperature, but the distribution will extend to higher energy levels of around n = 8 at a high temperature. More
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Published: 01 December 2008
Fig. 2.14 The entropy and the free energy of thermal vibration of a crystal (a) The entropy of thermal vibration. (b) The free energy of thermal vibration More
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Published: 01 July 2009
Fig. 19.5 Increase of −200-mesh loose beryllium powder density by vibration. Source: Beaver and Lympany 1965 More
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Published: 01 August 1999
Fig. 1 Scanning electron micrographs of polycrystalline aluminum exposed to vibratory cavitation at varying lengths of time. (a) 12 s. (b) 24 s. (c) 40 s. (d) 60 s. (e) 75 s. (f) 90 s. Source: Ref 2 More
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Published: 01 December 2004
Fig. 25 (a) Effectiveness of vibrating the load train to overcome friction in the spherical ball and seat couplings shown in Fig. 25(b) . (b) Spherically seated gripping device for shouldered tensile test piece More
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Published: 01 July 2009
Fig. 19.6 Vibrational-pack densities of selected particle sizings of NP-50A beryllium powder. Source: Hodge et al. 1966 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270182
EISBN: 978-1-62708-301-0
... Abstract A turbine in a fertilizer plant began to vibrate and was shut down to investigate the problem. A first stage rotor blade was found fractured and was removed along with several other blades for further examination. Based on their observations and testing, investigators concluded...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430325
EISBN: 978-1-62708-253-2
... tube fatigue, including mechanical or vibrational fatigue, corrosion fatigue, thermal fatigue, and creep-fatigue interaction. It discusses the causes, characteristics, and impacts of each type and provides several case studies. boiler tubes corrosion fatigue creep-fatigue interaction fatigue...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550141
EISBN: 978-1-62708-307-2
... Abstract Magnesium, by volume, is two-thirds the weight of aluminum and one-quarter the weight of steel. It also has good damping capacity, giving it an edge over other metals in high-vibration environments. This chapter discusses the basic metallurgy, alloy designations, compositions...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.tm.t52320013
EISBN: 978-1-62708-357-7
... Abstract This chapter describes the basics of energy and entropy and “free energy.” Fundamentals of internal energy U , the enthalpy H , entropy S , free energies G , and F of a substance are presented. The chapter also presents the thermal vibration model to promote a better...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250257
EISBN: 978-1-62708-345-4
..., deflection, vibration  Mechanical damage, mishandling  Lubrication  Foreign material  Corrosion  Continuous overloading  Impact overloading  Bearing failure  Maintenance  Operator error  Field application Source: Ref 1 Distinguishing characteristics...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270107
EISBN: 978-1-62708-301-0
... Abstract A helicopter lost the outboard rib on a tail rotor blade in flight and was forced to land because of the resulting vibrations. The investigation that followed is described in this chapter along with key findings. As shown in a sketch, the rib is held in place by a set of six rivets...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270197
EISBN: 978-1-62708-301-0
... Abstract One of the rotor bearings in an electric motor failed, producing excessive vibrate. The bearing was removed and disassembled, revealing craters and bruises on the inner ring raceway and balls along with evidence of melting and burning of metal. Scanning electron microscopy revealed...
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Published: 30 November 2013
Fig. 12 Mechanism of cavitation pitting fatigue. Serial sketches show a metal wall vibrating to the right and left against a liquid, which in all cases is to the right of the wall. The events shown can occur in a very short time, on the order of microseconds. (a) The metal moves to the right More
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Published: 01 November 2012
Fig. 26 Mechanism of cavitation pitting fatigue. Serial sketches show a metal wall vibrating to right and left against a liquid, which in all cases is to the right of the wall. The events shown can occur in a very short time, on the order of microseconds. (a) The metal moves to the right More
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Published: 01 December 2008
Fig. 6.1 Brownian motion and diffusion. Both are transport phenomena according to thermal vibration of atoms or molecules. More
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Published: 30 April 2021
Fig. 3.9 Schematic of a rolling element bearing test; a, test bearing; b, sensors for friction force, temperature, vibration, etc. More
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Published: 01 January 2000
Fig. 42 Fretting corrosion of the bearing race of a helicopter drive train over-running clutch. This problem was caused by vibration (and rubbing) of the ball in the inner and outer races of bearings that support the rotor shaft. Note the two areas on the left- and right-hand sides More