Method of determining elastic modulus

Details Method of determining elastic modulus Method of determining elastic modulus

2006-12-12

2006-12-12

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Mechanical measurement system

Reexamination Certificate

active

07149634

ABSTRACT:
A method and apparatus of determining an elastic modulus of a material having a Poisson's ratio v by a Berkovich indenter having an elastic modulus E; a Poisson's ratio v, and a cross sectional area A(h) as a function of depth are provided. The method and apparatus model the Berkovich indenter with a conical shape and a spherical cap.

REFERENCES:
patent: 2003/0060987 (2003-03-01), Dao et al.
Yang-Tse Cheng et al., “Relationship Between Hardness, Elastic Modulus, and the Work of Indentation”, Applied Physics Letters, 1998, pp. 614-616, vol. 73, No. 5, American Institute of Physics, USA.
W.C. Oliver et al., “An Improved Technique for Determining Hardness and Elastic Modulus Using Load and Displacement Sensing Indentation Experiments”, J. Mater. Res., 1992, pp. 1564-1583, vol. 7, No. 6, Materials Research Society, USA.
M.Dao et al., “Computational Modeling of the Forward and Reverse Problems in Instrumented Sharp Indentation”, Acta Materialia Inc., 2001, pp. 3899-3918, vol. 49, Elsevier Science Ltd., England.

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