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    • Experimental Study of Friction Losses in Ball Screws 

      Bălan, Rodica Mihaela; Urzică, Ana (Universitatea ”Dunărea de Jos” din Galați, 2009)
      In contrast with conventional sliding lead screws, ball screws with rolling friction between the screw and nut have high efficiency, accurate positioning and smooth, quiet operation at low friction that make this kind of ...
    • On the Effect of Spectral Characteristics of Roughness on Contact Pressure Distribution 

      Crețu, Spiridon; Bălan, Mihaela Rodica; Urzică, Ana (Universitatea ”Dunărea de Jos” din Galați, 2009)
      In the first part of the paper, the matrix containing the roughness heights is obtained by a linear transformation of the Gaussian input matrix, the coefficients of the transformation matrix being found as solutions of a ...