How to import what i beleive is Ls-Dyna files with an extension (.k) in to Abaqus CAE 6,7 edu version?? . Any free translaters are available or can it be done with Abaqus itself ??

 Thx in advance

mike 

Dear all,

         I am new to X-FEM, started reading papers a couple of weeks before. I understood, functions[heaviside,sign..] are used to enrich the nodes to simulate virtually the discontinuity and asymptotic functions are used to charecterize the crack tip,other than this regular FEM nodes are there. I have few questions. 

1.what is the role of the asymptotic functions and its unknown co-efficient 'b' in charecterizing the crack tip. What are the parameters do these functions exactly charecterize means wat are the details can we extract from these fns n co-effs?

what is the Difference b/w ref pt and datum pt in ABACUS??