abbhuiya's blog

1. Is there anyone familiar/working with the time integration schemes for 2D dynamic crack propagation in XFEM? I would like to discuss some of the issues I am facing. I will really appreciate any kind of help/suggestions! 

2. I tried to implement the time integration scheme proposed by Combescure et. al (An energy-conserving scheme for dynamic crack growth using the extended finite element method). But I am not sure about some of the strategies they are following in that paper. Anyone can clarify some of the questions I have?

I have been looking at XFEM literature for a while and wondering why do we need 2 different heaviside enrichment functions in XFEM? In paper titled "A finite element method for crack growth without remeshing" by Nicolas Moes et al.(1999), they use the following function for heaviside enrichment:

 H(x,y)={1, for y>0

             -1,for y<0}

 While, in paper titled "A review of extended/generalized finite element methods for material modeling" by Ted Belytschko et al.(2009), they use the following function for heaviside enrichment:

Hello everyone,

I was looking for a Matlab source code for implementing XFEM to solve a dynamic problem (specifically dynamic crack propagation problem). I found several source codes which only solve static problems (they don't calculate mass matrix and they don't do the time integration). 

My research goal is to remove the oscillations from stress intensity factors  for a dynmic crack propagation problem. I will really appreciate any kind of help/suggestions.

With respectfully

Bhuiyan, A B M Abdul Ali