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Fracture Mechanics Forum

crack velocity and FGM

Submitted by heqilin on

hi, everybody

i am going to simulate crack propagate by ABAQUS, but i haven't used ABAQUS before.

now i have two problems:

 1) can abaqus calculate the velocity of crack advancing?

 2)FGM(functionally graded materials ). material property varies at

 different position,such as density ,modulus, possion ration. can

 abaqus deal with this problem by umat .

thanks

Open source code for Embedded Strong Discontinuity (EFEM)

Submitted by Nguyen An on

Hi all,

I am now learning strain localization in solids and geometerial by
using Embedded Strong Discontinuity theory (EFEM or elemental
enrichment).  I am looking for an open source code to learn how to
understand and how to reproduce some examples by using EFEM. Did anyone
know that?

Any advice will be appreciated.

Cheers.

Using Acoustic Emission to Detect onset of Fracture

Submitted by Arash Karpour on


Hi Every one,

Dose any one know where I can get a good Manual/document on "detecting onset of fracture using acoustic emission"?

I heard some say this method of detecting onset of the fracture has
lots of error and is not accurate..is this true? if yes,why? Are there
other methods to find the onset of the fracture in an experiment?

question about interaction integral

Submitted by S.saeidifar on

 hi

I'm doing my master's in mechanical engineering.and my thesis is about fracture mechanics and meshless method (NEM).I got good results for two problems (single edge and single centered crack) using j- integral with NEM.I want to get stresss intensity factor with j-integral  for a mixed mode problem (single centered angled crack). I need your helps.I don't know how to get stress intensity factor for mode I and mode II using j-integral?

Best Regards.

applications of maths in the study of fractured surfaces

Submitted by mageru on

Hello everybody,

Please recommand me bibliography or the links on the WEB concerning the applications of different maths in the study of fractured surfaces. Thank you very much. In my country, Romania this domain is not know very well. Best regards from Romania!

Fracture Criterion

Submitted by Arash Karpour on
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 This is either a wage question I am asking or a stupid one...

How many fracture criterion do we have and what are they? some of these criterion that I am reading are related or a form of others...For example CTOD (crack tip opening displacement) criterion is related to energy release rate in

" A CTOD-Based Mixed-Mode Fracture Criterion" by Fashang Ma et al.

Any guid or direct help would be much appreciated.

 

   Thanks for your time

 

 Arash 

mapped meshing model having a crack in ansys

Submitted by Zoeb Kaizar La… on

hi,

 

i am student of M tech 2nd year and working on fracture mechanics one of the problems i am encoutaring is that my model is a rectangular plate and having a central hole with a crack now problem is that i can not mapped mesh the model in ansys can anyone tell me how to map meshed the model.

 

Regards

zoeb lakdawala

Guidelines

Submitted by karthi on
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HI all

     I am Karthikeyan pursuing my
M.S in Rotating Machinery Design. Its high time for me to take up the
project. So I decided to take my project in Fracture or Fatigue. I am
interested in Thermal fiels also. So I would like to do my project in
Thermal Fatigue fracture side. So I would like to get your suggestions
and some topics to take out work.

    I am
interested in coding also so if anybody give guidelines to develop an
element for this analysis then I will be grateful for them.