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Dynamic crack-XFEM

XFEM can be used in Abaqus for static analysis. I would like to use XFEM in implicit or explicit dynamic analysis.

I am using Abaqus version 6.13.

XFEM is allowed with static analysis in earlier Abaqus versions (6.9).

Newer versions have implicit dynamic analysis compatiblity with XFEM.

However, when I define an implicit dynamic step, 

XFEM Crack Growth option does not appear in the Interactions section when 'Initial Step' is chosen. It appears only if a static/general step is chosen.  

If 1)a static step is defined, and then a XFEM crack growth interaction is defined, and then 2) the static step is replaced with an implicit or explicit dynamic step, 

I get the following error message after the work has run:

ERROR: THIS KEYWORD IS NOT AVAILBLE IN Abaqus/Explicit

LINE IMAGE: *enrichment, name=CRACK-1, type+PROPAGATIONCRACK,

Elset=ASSEMBLY_PICKEDSET6

Is XFEM only available with step-1>static/general in Abaqus standard/explicit ?

What is the way to create a dynamic crack ?

Thanks.

 

 

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