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Flavio Stochino's picture

Eigenerosion for static and dynamic brittle fracture

In contrast to many numerical methods, the eigenerosion approach yields a convenient description of fracture handled in the postprocessing part of a Finite Element Analysis (FEA). Its fully energetic formulation avoids the introduction of extra degrees of freedom to model fracture propagation. Following previous works on eigenerosion, in this publication, a modified formulation of eigenfracture it is introduced, where it is distinguished between compression and tension loaded state.

grassl's picture

Damage plasticity model for concrete failure CDPM2

Those involved in the modelling of the failure of plain/reinforced concrete using damage and plasticity might be interested in our webpage

http://petergrassl.com/Research/DamagePlasticity/CDPMLSDYNA/index.html

which we have created to support our concrete damage plasticity model CDPM(2) in LS-DYNA. You can find there a number of example input files, reports and our implementation of the model in the form of a user subroutine.

 

How obtain tension strain concrete(σt0) in damaged plasticity model in ABAQUS?

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How obtain tension strain concrete(σt0) in damaged plasticity model in ABAQUS?

hello engineers

i need help about concrete damaged plasticity

fo example :

if Compressive stress (Fu)= 51.2 MPa

and tension stress (σ t)=0.3 x 51.2^(2/3)=4.136

1)why (σ t) is 2.36 in picture(uploaded)?

2)what is tension strain ? and how? i cant understand.

i cant obtain εt = total tensile strain.

how obtain εcr ?

please help

 

CONCREEP-10 Conference

CONCREEP-10,  the 10th Conference on Mechanics and Physics of Creep, Shrinkage and Durability of Concrete and Concrete Structures, will be organized  by the Vienna University of Technology (TU Wien) in cooperation with the Engineering Mechanics Institute of ASCE (EMI).  The conference will be held on September 21-23, 2015 at the  Vienna University of Technology in Vienna, Austria.  It will be chaired by Prof. Christian Hellmich, Prof. Johann Kollegger, and Prof. Bernhard Pichler, all of TU Wien.

Lattice modeling of rapid chloride migration in concrete

Dear all,

We recently publsihed a study on modeling rapid chloride migration in concrete using the lattice modeling approach. Registered subscribers can view the article at:

http://www.sciencedirect.com/science/article/pii/S0008884614000799

We appreciate any comments or suggestions.

 Regards 

Modelling time dependent concrete properties in ABAQUS

I am
carrying out a non-linear analysis of a concrete section subjected to construction
loading. I am looking to model the time-dependent effects of the material
properties as well as creep and shrinkage properties of concrete. In the ABAQUS
manual it states the General Static procedure
cannot be used to model time dependent effects. Naturally the Riks Method would be ideal to account of
the non-linear effects however it doesn’t allow for the use of multiple steps in
the analysis which is necessary to model the various stages of construction

Cracking of the concrete cover due to reinforcement corrosion

Dear all,

 Our paper titled "Cracking of the concrete cover due to reinforcement corrosion: A two-dimensional lattice model study"
 has just been published in Construction and Building Materials. It deals with numerical modelling of cracking of the concrete cover as a consequence of reinforcement corrosion, based on the Delft lattice model framework. Registered subscribers can download the article at: http://www.sciencedirect.com/science/article/pii/S0950061813002730

Durability of Reinforced concrete from Composition to Protection

The 6th International PhD Student Workshop on Durability of Reinforced
Concrete will be held in Delft, The Netherlands, during July 4 and 5,
2013, hosted by TUDelft. After a series of successful workshops, most
recently in Espoo (2012), Madrid (2010) and Guimarães (2009), IPSW2013
will be held under the auspices of RILEM EAC (Educational Activities
Committee), aiming to bring together young researchers in the field of
durability of concrete.

Proceedings

Dear all,

 

Proceedings of the V International PhD workshop dealing with durability of concrete, which was held in Finland in February, have been published. The publication is available for free download at:  http://www.vtt.fi/inf/pdf/technology/2012/T65.pdf . Many interesting and innovative topic, dealing both with experimental and numerical research of concrete durability, are presented.

Multiscale modeling of fracture processes in cementitious materials

Dear all,

 Today our colleague Zhiwei Qian defended his PhD thesis titled: Multiscale modeling of fracture processes in cementitious material. We would like to congratulate Dr Qian on achieving this. The full thesis is available for download at: http://repository.tudelft.nl/view/ir/uuid:734b276c-283a-4f7a-8db2-a18445...

For furher news on our project, follow our blog at: http://microlab-m3c4.blogspot.nl

Regards,

A day in the life...

New experiments on cracking and corrosion of steel in concrete performed by the M3C4 team. More details at http://microlab-m3c4.blogspot.nl/

Cheers!

News

Hi all,

 

Some news are available at our project blog, check them out at:  http://microlab-m3c4.blogspot.nl/

 

Regards,

Branko

SSCS 2012

Hi all,

 

Our research team took part in the conference "Sustainable Solutions for Concrete Structures", which took place in Aix-en-Provence, in France. The conference was dedicated mainly to recent advances in modelling of concrete and concrete structures. As always, more details can be found on:  microlab-m3c4.blogspot.com

 

Cheers! 

Concrete cracking and durability (first entry)

Hi all,

I am a PhD researcher working on relationship between cracking of concrete and its durability, using both experimental and numerical approaches. The work is being carried out at Delft University of Technology, in the Netherlands. For anyone interested, here is the webpage of the project:

microlab-m3c4.blogspot.com

Please feel free to send us any comments, suggestions, and possible collaboration proposals using the contact details provided on the website.

 Branko

HussamNasreddin's picture

Elastic material in abaqus

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Dear all,

I am using Abaqus to model concrete as an elastic material. However, the failure criteria available in the software is only for 2D elements and are dominated by a maximum normal stress (fail stress option) or normal strain (fail strain option) value.

I was wondering if anyone would know how to model concrete as an elastic material following "theory of elasticity" and failing by a maximum TENSILE strain value in any of the three directions given a material's point.

Modelling Concrete Beam wrapped with FRP using ANSYS...

Hello all,

   I am faced with a problem of modelling a reinforced concrete beam
wrapped with FRP using ANSYS. Can any one help me out please?

I would appreciate your response about this issue. Thnk ya all

grassl's picture

Two PhD studentships in computational fracture mechanics at the University of Glasgow

There are two PhD studentships available at the University of Glasgow in the area of computational fracture mechanics of concrete.

The topics are multiscale modelling of corrosion induced cracking and meso-mechanically motivated nonlocal models for fracture

Please visit my webpage at http://www.civil.gla.ac.uk/~grassl for more information.

All the best,

Peter Grassl

Angelo Simone's picture

Phd position in computational mechanics

A fully funded PhD position is immediately available in the area of multi-scale modeling of geomaterials within the research project "Failure of cohesive geomaterials: bridging the scales - GEOBRIDGE" at Laboratoire Sols, Solides, Structures - Risques (3S-R), Université Joseph Fourier, Grenoble, France.

Angelo Simone's picture

PhD position in computational mechanics

A fully funded PhD position is available in the area of multi-scale modeling of geomaterials within the research project Failure of cohesive geomaterials: bridging the scales - GEOBRIDGE at Laboratoire Sols, Solides, Structures – Risques (3S-R), Université Joseph Fourier, Grenoble, France. 

Reza Mousavi's picture

R C Beams

I am a novice user of abaqus and trying to model crack growth in rc beams with longitudinal reinforcement and stirrups under dynamic loads by try and error method Tongue out

siu's picture

Modelling RC component with ABAQUS considering bond-slip.

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Hello, all

I am trying to model a corroded beam under loading considering bond-slip effects. Following is the methods i used,

traditional concrete model VS damage concrete model

In my opioion, the traditional concrete model is taking the smeared cracking concept to deal with the tensile cracking and using the elastoplastic method to deal with the compressive softening.

We can find that recently the CDM based concrete model become a hot research subject.

But what are the advantages of the CDM-based?

Thank you very much!

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