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**Harvard**

Hård af Segerstad, P. (2008) *Nonlinear micromechanics of open-cell cellular solids*. Göteborg : Chalmers University of Technology (Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie, nr: 2825).

** BibTeX **

@book{

Hård af Segerstad2008,

author={Hård af Segerstad, Per},

title={Nonlinear micromechanics of open-cell cellular solids},

isbn={978-91-7385-144-2},

abstract={An approach for modelling the response of open-cell cellular solids at finite strains
is developed. The model framework comprises a mechanistic formulation where
the cellular solid is considered as a network of struts, each connecting two vertex
points. A hypothesis is proposed that the vertex points move affinely in the finite
strain regime, where the struts buckle in compression. Owing to this simple
ansatz, important material behaviour, such as the linear-elastic response and
plateau behaviour, are easily captured. Other important phenomena, such as
initial anisotropy and deformation induced anisotropy are inherent within the
method, and it is possible to include multiple nonlinear mechanisms, such as
hyperelasto-(visco)plasticity and damage, in a straightforward fashion.
First, a hyperelastic equation is developed in order to evaluate the suggested
kinematic approach. The model is implemented at material point level. The
model parameters are identified for a flexible, open-cell, polyeter urethane foam
and the equation is validated against a variety of experiments. Next, a micropolar
hyperelastic model is proposed for capturing length-scale effects associated with
couples carried by the struts. The model’s capability is demonstrated through
numerical simulations. Finally, an approach for capturing the inelastic response
is presented. Here, the resulting equations are evaluated against experiments on
both material point and component level with respect to an open-cell aluminium
alloy foam.},

publisher={Institutionen för tillämpad mekanik, Material- och beräkningsmekanik, Chalmers tekniska högskola,},

place={Göteborg},

year={2008},

series={Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie, no: 2825},

keywords={Foams, Constitutive modelling, Finite strains, Micropolar theory, FEM},

note={x, 16 + papers},

}

** RefWorks **

RT Dissertation/Thesis

SR Print

ID 71089

A1 Hård af Segerstad, Per

T1 Nonlinear micromechanics of open-cell cellular solids

YR 2008

SN 978-91-7385-144-2

AB An approach for modelling the response of open-cell cellular solids at finite strains
is developed. The model framework comprises a mechanistic formulation where
the cellular solid is considered as a network of struts, each connecting two vertex
points. A hypothesis is proposed that the vertex points move affinely in the finite
strain regime, where the struts buckle in compression. Owing to this simple
ansatz, important material behaviour, such as the linear-elastic response and
plateau behaviour, are easily captured. Other important phenomena, such as
initial anisotropy and deformation induced anisotropy are inherent within the
method, and it is possible to include multiple nonlinear mechanisms, such as
hyperelasto-(visco)plasticity and damage, in a straightforward fashion.
First, a hyperelastic equation is developed in order to evaluate the suggested
kinematic approach. The model is implemented at material point level. The
model parameters are identified for a flexible, open-cell, polyeter urethane foam
and the equation is validated against a variety of experiments. Next, a micropolar
hyperelastic model is proposed for capturing length-scale effects associated with
couples carried by the struts. The model’s capability is demonstrated through
numerical simulations. Finally, an approach for capturing the inelastic response
is presented. Here, the resulting equations are evaluated against experiments on
both material point and component level with respect to an open-cell aluminium
alloy foam.

PB Institutionen för tillämpad mekanik, Material- och beräkningsmekanik, Chalmers tekniska högskola,

T3 Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie, no: 2825

LA eng

OL 30