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homogenization

Homogenization using experimental data

Submitted by Structrual Engineer on
research
homogenization
constitutive eqations

I am exploring the area of homogenization applications in structural
engineering.

In the literature which I have studied so far, I found papers which
developed these techniques using the structural properties of the periodic
"Unit Cell".

I am interested in estimation of approximate homogeneous properties from the
experimental data of periodic/random structures.

Can someone comment on the feasibility of this study and point me to relevant
literature if available.

 

UMAT in multiscale modeling

Submitted by yax on
homogenization
stress-strain curve
RVE

Hi all,

I am using multiscale modeling in my analysis. This is what I am trying to do:

-After solving the RVE problem on microscale, I got the stress-strain relationship realated to my RVE and now I need to create a UMAT soubroutines for abaqus in order to call it at the integration points of the macro model. 

Is there a possibility to create a UMAT from stress-strain curve related to a representative volume element? How can I do that? Could you please give me an hint?

Thank you very much in advance for your help

Best regards

A review on multiscale methods for material modeling

Submitted by phunguyen on
research
fracture
multiscale
homogenization
finite elements
RVE
FE2

Dear all,

Please find enclosed our paper which is published on Journal of Multiscale Modelling
Vol. 3, No. 4 (2011) 1–42 which gives an overview of state of the art multiscale techniques for material modeling. 

The paper discusses the following topics: homogenization, Representative volume element, computational homogenization (Fe2 methods) for both both bulk materials and strong discontinuities. 

I hope the paper is useful for beginners to the field.

All the bests, 

Multiscale Modeling of Heterogeneous Materials - Post-Doc position in Pilsen

Submitted by erohan on
job
biomechanics
numerical methods
homogenization
Multi-scale modeling
Post-doc position
material design

The Post-Doc position is open for 2013-2014 (2 years) at the
Faculty of Applied Sciences of the University of West Bohemia in
Pilsen, Czech republic. Details to be announced at the end of September 2012.

  https://exliz.zcu.cz/en/about-project

Expansion behavior of cellular solids

Submitted by Ahmad Rafsanjani on
homogenization
swelling
anisotropy
cellular materials
cellular solids
Expansion

The expansion behavior of cellular materials is especially attractive for potential applications such as design and development of bio-inspired adaptive materials since most of biological materials have a cellular microstructure at least at one of their hierarchical levels. Wood, bone, bamboo, ice plant and honeybee combs are examples of such natural materials.

 

FEM versus FFT

Submitted by DoQuangHuy on
research
computational mechanics
numerical methods
homogenization
FEM
FFT
micomechanics

Dear all,

In micomechanics, homogenization of heterogeneous
materials based on FEM is traditional. Homogenization based on FFT technique has been recently found (in many literatures) to have much more advantages
in term of accuracy, computational cost and resource consumption.

I am wondering why FEMs are still
widely used in education, research, and industries of
generally
computational
mechanics ?

Please could anyone help me to clarify
my question?

Thanks

Homogenization technique

Submitted by Ahmad Akbari R. on
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homogenization
multiscale modeling solid mechanics
RVE
Hello all,
 
Why is there no body force considered in the equilibrium equations of the RVE in the homogenization technique?
 
The overall response of the RVE is obtained by solving the RVE boundary value problem under prescribed boundary conditions (either traction or displacement BC) without considering the body force. 
 
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