Reference Work Entry

Encyclopedia of Thermal Stresses

pp 21-27

Acceleration Waves in Nonlinear Thermoelastic Micropolar Media

  • Victor A. EremeyevAffiliated withOtto–von–Guericke University MagdeburgSouth Scientific Center of RASci and South Federal University Email author 

Synonyms

Acceleration waves; Micropolar continuum; Thermoelasticity​

Definition

By the term “acceleration wave”, we mean an isolated geometric surface that moves relative to the material points, across which the acceleration is discontinuous but the displacement and velocity are continuous. More generally, we call an acceleration wave a propagating surface across which second derivatives of some fields undergo discontinuity jump. In the theory of the nonlinear thermoelastic micropolar continuum (called also Cosserat continuum), acceleration waves relate with some jumps of linear and angular accelerations as well as second derivatives of temperature. Acceleration waves are similar to sound waves in solids; they also relate with the localization of deformations in solids.

Overview

Analytic solutions in the theory of the propagation of nonlinear waves are exceptional, and acceleration waves present one of the exceptions. An acceleration wave (or a wave of weak disconti ...

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