Method for determining preselected performance characteristics of a tread of a tyre and tyre provided with a tread having optimal characteristics with reference to said performance characteristcs

摘要

A method for determining preselected performance characteristics of a tread (1) of a tyre (2) consists in dividing the tread in a grid of cells (23, 24) forming piles of cells which are full, empty or partially full; identifying a group of piles of cells in each contact area (22); determining longitudinal stiffness values cxj and transversal stiffness values cyj for each pile; identifying families of discrete areas and transversal strips (30) in each contact area; determining, for each strip (30), forces per unit of length by means of cxj and cyj, longitudinal stiffness values per unit of length cpx and transversal stiffness values per unit of length cpy and by means of cpx and cpy and a preselected state of deformation; determining total forces associated with all contact areas by means of single forces associated with the discrete areas, and evaluating their pattern so as to establish whether the arrangement of full and empty cells optimizes the performance characteristics of the tread .