Zobrazeno 1 - 10
of 143
pro vyhledávání: '"Hütter Geralf"'
Capturing and predicting the effective mechanical properties of highly porous cellular media still represents a significant challenge for the research community, due to their complex structural interdependencies and known size effects. Micromorphic t
Externí odkaz:
http://arxiv.org/abs/2403.10532
The usage of numerical homogenization to obtain structure-property relations using the finite element method at both the micro and macroscale has gained much interest in the research community. However the computational cost of this so called FE$^2$
Externí odkaz:
http://arxiv.org/abs/2306.02687
Due to their good ratio of stiffness and strength to weight, foam materials find use in lightweight engineering. Though, in many applications like structural bending or tension, the scale separation between macroscopic structure and the foam's mesost
Externí odkaz:
http://arxiv.org/abs/2301.04910
Autor:
Hütter, Geralf
Publikováno v:
Journal of the Mechanics and Physics of Solids 171 (2023), 105135
Micromorphic theories became an established tool to model size effects in materials like dispersion, localization phenomena or (apparently) size dependent properties. However, the formulation of adequate constitutive relations with its large number o
Externí odkaz:
http://arxiv.org/abs/2203.08611
Autor:
Rizzi, Gianluca, Hütter, Geralf, Khan, Hassam, Ghiba, Ionel Dumitrel, Madeo, Angela, Neff, Patrizio
We solve the St.Venant torsion problem for an infinite cylindrical rod whose behaviour is described by a family of isotropic generalized continua, including the relaxed micromorphic and classical micromorphic model. The results can be used to determi
Externí odkaz:
http://arxiv.org/abs/2104.11322
Publikováno v:
Computer Methods in Applied Mechanics and Engineering 382 (2021), 113886
The FE$^2$ method is a very flexible but computationally expensive tool for multiscale simulations. In conventional implementations, the microscopic displacements are iteratively solved for within each macroscopic iteration loop, although the macrosc
Externí odkaz:
http://arxiv.org/abs/2101.01802
Publikováno v:
In Computer Methods in Applied Mechanics and Engineering 1 January 2024 418 Part A
We consider the cylindrical bending problem for an infinite plate as modelled with a family of generalized continuum models, including the micromorphic approach. The models allow to describe length scale effects in the sense that thinner specimens ar
Externí odkaz:
http://arxiv.org/abs/2012.10391
Autor:
Pham, Rinh Dinh, Hütter, Geralf
Publikováno v:
Mechanics of Material 154 (2021) 103727
Cellular solids are known to exhibit size effects, i.e., differences in the apparent effective elastic moduli, when the specimen size becomes comparable to the cell size. The present contribution employs direct numerical simulations (DNS) of the meso
Externí odkaz:
http://arxiv.org/abs/2009.10404
To draw conclusions as regards the stability and modelling limits of the investigated continuum, we consider a family of infinitesimal isotropic generalized continuum models (Mindlin-Eringen micromorphic, relaxed micromorphic continuum, Cosserat, mic
Externí odkaz:
http://arxiv.org/abs/2006.02391