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Effect of Gurson model parameters on the J integral for a CCP specimen with Abaqus

Submitted by Mohamed H.Miloud on

Hi

The question is coupling the Gurson model with the crack propagation on a CCP specimen with Abaqus. Then a study of the influence of parameters of the Gurson model J-intgrale  And deduct the best set  of the parameters with we can adjust the JR curve computed on the experimental curve

 

Pijaudier-Cabot and Bazant concept of non local damage

Submitted by ss09 on

Hello all,

I would like to seek help on a topic on which I am slightly ignorant.

I do not understand the concept of non local damage and the internal length of the non local continuum as described by the well quoted paper of Pijaudier-Cabot and Bazant (1987) in continuum damage mechanics.  So may I please ask the experts in this forum to please explain to me using some simple analogy.

Dependence of relaxation time on the polymer length (via a string of viscoelastic springs)

Submitted by kongdong on

Dear all,



According to polymer theory, the relaxation time depends on its length (or unit number), and there exist some relationships to describe such dependence. The smaller number of polymer units, the smaller the relaxation time  of the polymer is. How to describe this via a simple model of visco-elastic springs?



surface to sarface meshing in ABAQUS

Submitted by afarin on
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Hi everybody,

I have designed a composite made up of woven fabrics in CATIA v5 and imported to the ABAQUS. While meshing the 8 parts, I saw that any of the two surfaces having interfaces with each other, have different elements and nodes while there should be the same elements and nodes (meshes) at their interfaces. What should I do in meshing module to solve this problem?

 

 

Bending and wrinkling as competing relaxation pathways for strained free-hanging films

Submitted by Peter Cendula on

A thin film subject to compressive strain can either bend (for large strain gradient) or wrinkle (for small strain gradient). The bending is traditionally used in thermostats (bimetal stripes), but couple of years ago, it was extended to the nanoscale thin films which can bend and roll-up to tubes with defined number of rotations. The wrinkles are also rather common in macro- and microscale thin films.
Here, we developed an equilibrium phase diagram for the shape of
compressively strained free-hanging films by total strain energy
minimization.

Abaqus modelling to find out the time of failure when increasing the temperature???

Submitted by baleshan on

Hi all,

 

If you can pls advise me to modelthis experiment.

 

First I have applied a constantload for the steel member.

Then I have increased thetemperature of one of the member surface with time

until the member got failed.

This resulted in non-uniformtemperature variation across the section.

I have measured the temperaturesof the different surfaces of the member and

I would like to use thesetemperature values in my structural modelling.

Now I would like to model themember so that I can find out the time