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A rate-independent ...
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Gasser, T. Christian
(författare)
A rate-independent elastoplastic constitutive model for biological fiber-reinforced composites at finite strains : continuum basis, algorithmic formulation and finite element implementation
- Artikel/kapitelEngelska2002
Förlag, utgivningsår, omfång ...
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Springer Science and Business Media LLC,2002
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:kth-22057
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-22057URI
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https://doi.org/10.1007/s00466-002-0347-6DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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QC 20100525
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This paper presents a rate-independent elastoplastic constitutive model for (nearly) incompressible biological fiber-reinforced composite materials. The constitutive framework, based on multisurface plasticity, is suitable for describing the mechanical behavior of biological fiber-reinforced composites in finite elastic and plastic strain domains. A key point of the constitutive model is the use of slip systems, which determine the strongly anisotropic elastic and plastic behavior of biological fiber-reinforced composites. The multiplicative decomposition of the deformation gradient into elastic and plastic parts allows the introduction of an anisotropic Helmholtz free-energy function for determining the anisotropic response. We use the unconditionally stable backward-Euler method to integrate the flow rule and employ the commonly used elastic predictor/plastic corrector concept to update the plastic variables. This choice is expressed as an Eulerian vector update the Newton's type, which leads to a numerically stable and efficient material model. By means of a representative numerical simulations the performance of the proposed constitutive framework is investigated in detail.
Ämnesord och genrebeteckningar
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biomechanics
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soft tissue
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elastoplasticity
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anisotropy
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finite element method
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crystal plasticity
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computation
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framework
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Holzapfel, Gerhard A.
(författare)
Sammanhörande titlar
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Ingår i:Computational Mechanics: Springer Science and Business Media LLC29:05-apr, s. 340-3600178-76751432-0924
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