the last article from the below link can give you a little help.
MIHAI OVIDIU GHIBA, RADU PREJBEANU, DINU VERMESAN
FINITE ELEMENT MODEL ANALYSIS OF COXOFEMORAL JOINT
USING COMPOSITE MATERIALS
http://www.revmaterialeplastice.ro/arhiva_eng.asp?lim=eng&rev=mp&syear=2010