I have been trying to implement the J integral for an isotropic FGM based on the following paper
https://asmedigitalcollection.asme.org/appliedmechanics/article-abstract/72/3/351/459494/Consistent-Formulations-of-the-Interaction?redirectedFrom=fulltext
Please find enclosed the image which has the details.
Hi I tried to code a basic phase field model for fracture in octave.
It doesn't seem to converge to the correct load. It fails later.
Also mesh refinement did not improve the results.
The link to the GIT is here
https://github.com/dontcallmesuren/Phase-field-modelling.git
Any idea where I am wrong?
Ping me. Thanks in advance.
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