09~chapter 09

09~chapter 09 - Materials: engineering, science, processing...

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Unformatted text preview: Materials: engineering, science, processing and design, 2nd edition Copyright (c)2010 Michael Ashby, Hugh Shercliff, David Cebon Vibration and Resonance Materials: engineering, science, processing and design, 2nd edition Copyright (c)2010 Michael Ashby, Hugh Shercliff, David Cebon Loading and unloading a part is never completely reversible energy is always lost this fact is pronounced when loading is in vibration Damping coefficient Measures the degree to which a material dissipates vibrational energy Loss coefficient Fraction of the stored energy not returned on unloading Types of Cyclic Loading Materials: engineering, science, processing and design, 2nd edition Copyright (c)2010 Michael Ashby, Hugh Shercliff, David Cebon Figure 9.1 (a) Low amplitude acoustic vibration (b) High-cycle fatigue: cycling below the yield strength (c) Low-cycle fatigue: cycling above the yield strength but below the the tensile strength High-cycle fatigue loading is most significant in engineering terms Fatigue Materials: engineering, science, processing and design, 2nd edition Copyright (c)2010 Michael Ashby, Hugh Shercliff, David Cebon Figure 9.2 Depends on the amplitude...
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This note was uploaded on 02/15/2012 for the course MASC 310 taught by Professor Nutt during the Fall '08 term at USC.

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09~chapter 09 - Materials: engineering, science, processing...

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