Measuring The Elastic Modulus
The most direct way to determine the elastic modulus of a material is by placing a sample under increasing stresses, and measuring the resulting strains. The results are plotted as a graph, with strain along the horizontal axis and stress along the vertical axis. As long as the strain is small, the data form a straight line for most materials. This straight line is the "elastic region." The slope of the straight line equals the elastic modulus of the material. Alternatively, the elastic modulus can be calculated from measurements of the speed of sound through a sample of the material.
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Sara G. B. Fishman
Science EncyclopediaScience & Philosophy: Dysprosium to Electrophoresis - Electrophoretic TheoryElasticity - Stress, Strain, And Elastic Modulus, Other Elastic Deformations, Crystalline Materials, Elastomers, Sound Waves - Elastic limit, Elasticity on the atomic scale