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Article | REF: K486 V1

Mechanical constants - Elasticity coefficients

Author: Bernard LE NEINDRE

Publication date: December 10, 1991 | Lire en français

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    AUTHOR

    • Bernard LE NEINDRE: Doctor of Science - Director of Research at the French National Center for Scientific Research (CNRS)

     INTRODUCTION

    In a crystalline solid, according to Hooke's law, elastic deformation is proportional to the applied stress, and the coefficient of proportionality is Young's modulus. Poisson's ratio is the (negative) ratio between lateral and axial stresses. Knowing two of these elasticity coefficients will enable us to fully define the relationship between stress and strain.

    Note :

    Readers are referred to the articles :

    • Effect of high and very high pressure;

    • Phase diagrams at very high pressures;

    • Find out more;

    as well as in the High Pressure article [R 2 060] of the Measurement and Control treaty.

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