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Plane-strain waves in nonlinear elastic solids with softening

Abstract : Propagation of elastic waves in damaged media (concrete, rocks) is studied theoretically and numerically. Such materials exhibit a nonlinear behavior, with long-time softening and recovery processes (slow dynamics). A constitutive model combining Murnaghan hyperelasticity with the slow dynamics is considered, where the softening is represented by the evolution of a scalar variable. The equations of motion in the Lagrangian framework are detailed. These equations are rewritten as a nonlinear hyperbolic system of balance laws, which is solved numerically using a finite-volume method with flux limiters. Numerical examples illustrate specific features of nonlinear elastic waves, as well as the effect of the material's softening. In particular, the generation of solitary waves in a periodic layered medium is illustrated numerically.
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https://hal.archives-ouvertes.fr/hal-02057946
Contributor : Bruno Lombard Connect in order to contact the contributor
Submitted on : Tuesday, March 5, 2019 - 4:49:27 PM
Last modification on : Thursday, November 4, 2021 - 2:44:09 PM
Long-term archiving on: : Thursday, June 6, 2019 - 5:59:40 PM

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  • HAL Id : hal-02057946, version 1
  • ARXIV : 1903.02229

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Harold Berjamin, Bruno Lombard, Guillaume Chiavassa, Nicolas Favrie. Plane-strain waves in nonlinear elastic solids with softening. Wave Motion, Elsevier, 2019, 89, pp.65-78. ⟨hal-02057946⟩

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