%0 Journal Article %T Penetration factor of the surfaces in fast algorithm of solution of contact problems for wheel and rail. %A Sakalo, V.. %A Sakalo, A.. %K fast algorithm, penetration factor, contact area, contact pressure distribution, finite element method. %J Bulletin of Bryansk state technical university %D 2015 %N 2015 %P 5 %I Bryansk State Technical University