Une pure merveille !
Un roman d'une grande beauté, drôle, fin, extrêmement lumineux sur des sujets difficiles : la perte de
l'être aimé, la dureté de la vie et la tristesse qu'on barricade parfois... Elise franco-japonaise,
orpheline de sa maman veut poser LA question à son père et elle en trouvera le courage au fil des pages,
grâce au retour de sa grand-mère du japon, de sa rencontre avec son extravagante amie Stella..
Ensemble il ne diront plus Sayonara mais Mata Ne !
Viscoelastic damping is becoming widely applied for vibration and noise control in various industries, the most notable examples being aerospace, automotive,...
Lire la suite
Livré chez vous entre le 3 octobre et le 9 octobre
En librairie
Résumé
Viscoelastic damping is becoming widely applied for vibration and noise control in various industries, the most notable examples being aerospace, automotive, computer
peripherals and propulsion. A recent review of the literature shows that many engineers
are still applying the technology without having a good understanding of the basic
underlying principles or the means of describing and measuring the damping
parameters.
This comprehensive book introduces simple and effective approaches for describing the damping related properties of viscoelastic materials, with emphasis on the effects of frequency and temperature, and proceeds to illustrate simple techniques for measuring the desired properties and for selecting and applying the materials. In all cases, the need for simplicity in practical applications is emphasized.
Particular topics addressed in some detail include:
* the complex modulus model of viscoelastic behaviour
* effects of frequency and temperature on stiffness and damping of viscoelastic materials
* combination of frequency and temperature into a single variable
* analysis and evaluation of the quality of available test data by means of the Wicket Plot
* simple means of measuring stiffness and damping of viscoelastic materials
* time-dependent behaviour
* simple approaches for design of treatments for practical structural applications
Practical examples will illustrate the approaches taken. The technical level is as simple as can be achieved without losing clarity, in order that newcomers to the technology can quickly learn the essentials and apply viscoelastic damping in their workplace. This is particularly a handbook for practicing engineers confronted daily by vibration problems, who are nevertheless beginners in the specific area of viscoelastic damping.
Sommaire
Introduction to damping
Modeling the dynamic mechanical behaviour of viscoelastic materials
The effects of temperature and frequency on complex modulus properties
Measurement of complex modulus properties
Numerical analysis of measured complex modulus data
The complex modulus behaviour of typical polymeric materials
Harmonic and non-harmonic response of simple viscoelastic systems
Controlling vibration using viscoelastic materials