# crack growth

## A well‐conditioned and optimally convergent XFEM for 3D linear elastic fracture

A well‐conditioned and optimally convergent XFEM for 3D linear elastic fractureK Agathos, E Chatzi, S Bordas… - International Journal for …, 2015 - Wiley Online LibrarySummary A variation of the extended

## ABAQUS XFEM error message: std_findcutoneedge3d8_xfem

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Hi everyone,

After switching from a working 2D model to 3D, I'm facing the following error message after about 20 iteration steps:

The system error in std_findcutoneedge3d8_xfem -- nodal level set values might not be correct for element 12345 instance FEM_MODEL_V1

## Crack propagation in ANSYS vs. ABAQUS

Hello dear friends,

## modelling the crack in Abaqus

Hi colleage

I am working on fracture mechanics recently and i am using Abaqus to do it, i am a new user in this software so i have some problems, in getting results and ... i want to get some variable such as J-integral, S.iF, number of cycles and ... but unfortunatelly i donno how to get it .

i want to ask if anybody can send me a sample of abaqus in this srea, then i can study and practise according to it and after that i can go through my project.

this is my email: mahyar.iii@gmail.com

## Mathematics of Crack growth

1.  How to find G (energy release rate) using wnuk's equation? by considering the fracture process zone explaining the assumptions and concept involved??
2. can anyone explain about : Eshelby's basic assumption for finding the change of displacement after the crack tip has moved a distance x?
3. How is the general form(equation) for singular parts of the stresses in the plane of the crack  derived (explain the breif fundamentals) ?

all these question are in reference to the book Micromechanics of defects in solids by toshio mura

## Fatigue crack growth

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Hi all,

I wanted to simulate fatigue crack growth in ls-dyna, obtain dK, crack tip stress fields. But I wanted to start from a simple model. I can't find any examples online, tutorial...