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Phase Field Modelling of Fracture Mechanics

Submitted by PrajwalSabnis on
Forums
Fracture Mechanics Forum

Hello To one and All,

 

I am currently working on my Master's thesis in Computational
Mechanics and as the Title suggests, I am working on using phase field
theories to model fracture mechanics. The whole idea /concept of phase
field modelling in itself has been a very complex topic for me, as it
originates in superconductivity theories of which I have but a
superficial understanding. I am ok with fracture mechanics terminology
as I have worked on it before.

 

Question about stochastic Finite Elements

Submitted by tlaverne on
industry
FEM
software
sfem

Hi to the community !

I would like to ask if anyone have some experience with stochastic finite elements in an industrial context ?

Would you know some software (free or commercial) package for stochastic finite elements ?

Why do I have the feeling that sfem methods which look to be very promising aren't used much in practice ? Am I wrong when I say that ?



Thank you very much for any help about that !

Thomas Laverne

 

Chaboche elasto-viscoplastic model with plastic strain memorization and time-recovery in ANSYS

Submitted by Barbara on
research
viscoplasticity
chaboche

Hi, I am a reserach fellow of mechanical engineering in Italy. I need to implement the elasto-viscoplastic model of Chaboche in a user subroutine in ANSYS accounting also for the plastic strain memorization and for the static and dynamic recovery. In a next step I sould also need to incorporate the damage variable of this model.

Schlumberger Postdoctoral Research Position in Mechanical Systems Modeling

Submitted by Nathan Wicks on
job
postdoctoral position
Schlumberger

Schlumberger is the leading supplier of technology, project management, and information solutions, trusted to deliver superior results and improved E&P performance for oil and gas companies around the world. Through our well site operations and in our research and engineering facilities, we are working to develop products, services and solutions that optimize customer performance in a safe and environmentally sound manner.

Determination of material Mechanical Properties in ANSYS using Force-Displacement graph obtianed experimentally

Submitted by Abdullah Chami on
Forums
Biomechanics Forum
Free Tags
materials modeling
hyperelasticity

Hi all.

I am a doctor course student in Biomechanics in Nagoya University - Japan.

I read a bunch of papers in which the determining the conffecients of hyperelasticty of the skin soft tissue was done by using FE Simulation of an expermiment that can be performed on the skin then TWEAKING (IN FACT ANSYS SUPPOSE TO HAVE AN ITERATIVE MODEULE TO DO THIS) the conffecients so THAT the force-displacement results from the simulation are close enough to the ones obtained from experiment.

NOW:

I have the Experiment results

comments on second page

Submitted by Rui Huang on
iMech

I just noticed a new problem with imechanica: when a blog entry has received too many comments, additional comments will be placed on a second page but not linked properly. For example, the comment, "Work-free isochoric deformation", has a link node/5014#comment-10406 , which leads to the original blog entry rather than the comment. One can find the comment either by scrolling all the way down to the bottom of the page and then clicking "Next" or by a direct link, node/5014?page=1.

The essential assumption of Cauchy Stress

Submitted by Xu Guo on

The essential assumption of Cauchy Stress

is the existence of the limit  (\Delta f)/ (\Delta A) as  \Delta A-->0. 

This means that a infinitesimal small area can only sustain infinitesimal

small surface force. Therefore in the framework of conventional continuum

mechanics, we can only talk about the "force density (stress)" at a point.

The expression int_A (f.n)dA has no physical meaning. Only int_A (stress.n)dA

can give the total force exerting on a closed surface A.

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