Abstract
Within the framework of linear elasticity, the principal of superposition holds and the elastic wave velocity is independent of the stress acting in the solids. But, this is an approximation after all and solid materials exhibit nonlinear responses; the velocities vary in proportion to stress although in very small magnitude in general. This phenomenon, called acoustoelasticity, originates from the anharmonic interatomic potential. This chapter provides the theoretical background of acoustoelasticity and a number of measurement result with EMATs on applied and residual stresses of industrial importance.
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Hirao, M., Ogi, H. (2017). Acoustoelastic Stress Measurements. In: Electromagnetic Acoustic Transducers. Springer Series in Measurement Science and Technology. Springer, Tokyo. https://doi.org/10.1007/978-4-431-56036-4_12
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DOI: https://doi.org/10.1007/978-4-431-56036-4_12
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