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Gewählte Publikation:

Weingartner B.; Osinov V. ;Wu W..
(2006): Acceleration wave speeds in a hypoplstic constitutive model
INT J NONLINEAR MECH, 41, 991-999; ISSN 0020-7462 FullText FullText_BOKU

The paper presents a theoretical investigation of acceleration waves in a plastic material described by an incrementally non-linear hypoplastic constitutive equation. Speeds of plane acceleration waves and their dependence on the stress state are calculated. The spectrum of possible wave speeds is found to be continuous, which is in contrast to discrete wave speed spectra in incrementally linear models. Two types of ill-posedness are revealed. known as flutter ill-posedness and stationary discontinuity. The wave speed analysis is also performed by the characteristic method, leading to different equations compared to the acceleration wave approach. It is proved that for the considered hypoplastic constitutive equation both approaches give identical wave speed spectra. (C) 2006 Elsevier Ltd. All rights reserved.
Autor/innen der BOKU Wien:
Wu Wei
BOKU Gendermonitor:

Find related publications in this database (Keywords)
acceleration waves
flutter ill-posedness
incremental non-linearity

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