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Meso-macro-scale constitutive modeling with error control

Fredrik Larsson (Institutionen för konstruktionsteknik, Datorintegrerad konstruktionsmekanik) ; Kenneth Runesson (Institutionen för tillämpad mekanik, Materialteknik ; Institutionen för konstruktionsteknik, Datorintegrerad konstruktionsmekanik)
Proceedings CDROM of the Sixth World Congress on Computational Mechanics in conjunction with the Second Asian-Pacific Congress on Computational Mechanics (2004)
[Konferensbidrag, refereegranskat]

We consider combined material model and FE-mesh adaptivity in the context of computational meso-macro-scale modeling, whereby the coupling between different geometrical scales is taken into account. The macro-scale model is then replaced by the homogenized response of a Representative Volume Element (RVE). In practice, the RVE is analyzed as a ''small-scale'' finite element problem, which is solved for each (Gauss)point in the domain. In this presentation we discuss, in particular, one major source of macro-scale model error for given mesostructural morphology and constitutive models of the meso-constituents: The size, or degree of "representativeness", of the RVE. Results will be shown for a composite meso-structure with stiff particles embedded in a soft matrix while assuming that both constituents respond as hyperelastic continua with perfect bond. It seems as a reasonable strategy to aim at equibalancing this model error and the macro-scale discretization error for given loading.



Denna post skapades 2006-09-28. Senast ändrad 2015-06-12.
CPL Pubid: 3788

 

Institutioner (Chalmers)

Institutionen för konstruktionsteknik, Datorintegrerad konstruktionsmekanik (1900-2004)
Institutionen för tillämpad mekanik, Materialteknik (1900-2004)

Ämnesområden

Samhällsbyggnadsteknik
Teknisk mekanik

Chalmers infrastruktur