Abstract:
Rationale and Summary of Methods for Determining Ultrasonic Properties of Materials
at Lawrence Livermore National Laboratory

by Albert E. Brown, February 9, 1995

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ABSTRACT

This report is a summary of the methods used to determine ultrasonic velocities through the many materials tested at the Acoustic Properties of Materials Laboratory. Ultrasonic velocity techniques enable us to determine material properties, including elastic moduli, without harming the materials being tested, an advantage some over mechanical methods. Ultrasonic modulus determination has other advantages as well:

1.) relative ease and low cost of material preparation, and,

2.) comparative analysis to physical testing as a function of material loading rate dependence.

In addition, ultrasonic measurement provides clues to determine grain size and orientation, and provides a relative indication of material anisotropy with respect to the material geometry. We usually perform ultrasonic measurements on materials in ambient atmospheric conditions, and in a relatively free-free condition. However, we can perform them in other environments, as required. This paper describes some of our techniques and shows how ultrasonic velocities are used to establish elastic constants. It also includes a sample test report for a homogeneous isotropic solid, along with a list of references.

CONTENTS |Full Text|

CHAPTER I

Introduction
 Table of Symbols

  • Determining Ultrasonic Velocity

    CHAPTER II

  • RELATIONSHIP BETWEEN ULTRASONIC VELOCITY AND ELASTIC MODULI

  • WHAT ELSE? A LOOK AT SOME OTHER TECHNIQUES

  • CONCLUSIONS

  • REFERENCES

  • Appendix A

  • Appendix B

  • Appendix C

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