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Concrete cracking and durability (first entry)

Submitted by shavijabranko on
research
fracture mechanics
durability
concrete

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

Elastic material in abaqus

Submitted by HussamNasreddin on
Forums
Materials Forum
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research
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concrete
Abaqus; Strain; Umat;

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.

It would also be perfect if deleting elemnts option can be used in this case.

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

Submitted by grassl on
job
fracture mechanics
concrete

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

Phd position in computational mechanics

Submitted by Angelo Simone on
job
fracture
Rocks
soils
xfem
gfem
damage
homogenization
multi-scale
concrete
discontinuities
geomaterials

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.

PhD position in computational mechanics

Submitted by Angelo Simone on
job
fracture
soils
xfem
gfem
damage
homogenization
multi-scale
concrete
discontinuities
geomaterials

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. 

R C Beams

Submitted by Reza Mousavi on
Beam
crack growth
concrete

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

rebar layers are in shell element and i am using CDP for my concrete. i am trying to find out if i need to have many solid parts or one is enough and if mesh adaptivity is necessary or not because of crack growth . I appreciate any consulting in this field and i will share my knowledge with anybody that helps me

my first error message is

Modelling RC component with ABAQUS considering bond-slip.

Submitted by siu on
Forums
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concrete
REINFORCEMENT
RC beam
bond-slip
spring elements
tension stiffening

Hello, all

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

  • FRACTION

           I define the interface between the reinforcement and the concrete, then i added fraction and give the fraction coefficient. However without vetical force, the fraction coefficient is useless. I also define the shear limit which brings no improvement too. So i give up this solution.

traditional concrete model VS damage concrete model

Submitted by NewerLi on
opinion
concrete
smeared cracking approach
damage 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!

Effect of aggregate (coarse aggregate) size on conpressive strength of concrete

Submitted by Gouse on
research
strength
concrete
coarse aggregate

Hi,

I want to know what is the effect of coarse aggregate size or size of the aggregate on compressive strength of concrete.And similarly what is effect of aggregate size on tensile strength of concrete.

I have few papers which contradicts each other so I am confused.

With Warm Regards

Gouse

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