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Title
A basic hypoplastic constitutive model for sand
AuthorWu, Wei ; Lin, Jia ; Wang, Xuetao
Published in
Acta Geotechnica, Berlin, 2017, Vol. 12, Issue 6, page 1373-1382
PublishedBerlin : Springer, 2017
LanguageEnglish
Document typeJournal Article
Keywords (EN)Constitutive model / Critical state / Granular material / Hypoplastic model
ISSN1861-1133
URNurn:nbn:at:at-ubbw:3-2470 Persistent Identifier (URN)
DOI10.1007/s11440-017-0550-4 
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 The work is publicly available
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A basic hypoplastic constitutive model for sand [0.79 mb]
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Abstract (English)

Hypoplastic constitutive models are based on nonlinear tensor functions and are characterized by simple formulation and few parameters. In its early stage, mainly basic hypoplastic constitutive equations were concerned, where the stress tensor is assumed as the only state variable. There followed some enhanced models based on the basic constitutive equation by including void ratio as an additional state variable. In this paper, we first show that the widely used hypoplastic model by Wolffersdorff is seriously flawed because the underlying basic equation does not perform properly. We proceed to develop a basic hypoplastic constitutive equation by introducing a new tensorial term, which preserves the critical state at large strain. The model performance is demonstrated by parameter study for some element tests. This simple and robust basic equation is well suited to build more sophisticated models.

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CC-BY-License (4.0)Creative Commons Attribution 4.0 International License