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Gewählte Publikation:

Weingartner B.,Osinov V.A., Wu W..
(2008): Effect of inherent anisotoropy on acceleration wave speeds in hypoplasticity
INT J ENG SCI, 46, 286-292; ISSN 0020-7225 FullText FullText_BOKU

Abstract:
Generally, soils possess an inherent fabric with transverse isotropy on the bedding plane. As a consequence, the deformation-stress characteristics show a dependence on the loading direction. Anisotropy is characterized by a vector normal to the bedding plane. In this paper we investigate the speeds of acceleration waves in an inherently anisotropic hypoplastic material. For the incrementally nonlinear hypoplastic constitutive equation the wave speed spectrum is continuous in contrast to discrete spectra in incrementally linear constitutive models. The so-called flutter instability arises when the equation for the wave speeds has complex solutions. In the principal stress space, a surface of first occurrence of flutter instability can be identified by analogy with the failure surface defined by a vanishing stress rate. We analyse the influence of the anisotropy on these surfaces and the change in their shape and symmetries depending on the bedding angle. (c) 2007 Elsevier Ltd. All rights reserved.
Autor/innen der BOKU Wien:
Wu Wei
BOKU Gendermonitor:


Find related publications in this database (Keywords)
anisotropy
hypoplasticity
wave speed
acceleration waves
flutter instability


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