METHOD FOR PREDICTING THE MAXIMUM ROLLING DISTANCE IN DEGRADED MODE OF A MOUNTED ASSEMBLY
The invention relates to a method for predicting the maximum rolling distance in degraded mode, without substantial rolling deterioration, of a mounted assembly (9) comprising a rim with a safety support and tyre mounted thereon. The inventive method consists in rolling the mounted assembly (9) at reduced or zero inflation pressure or rolling said rim-mounted support over at least one rolling surface (21) from one instant t0, under a determined load and at a constant speed V, in such a way that the centre (C) of the rim is a more or less invariant point during the rolling, following the variation of variable R, which is representative of the radial deflection of the support as a function of rolling time t. The inventive method also consists in: (i) determining a value R1 that variable R reaches at the end of a predetermined stabilisation time t1 such that the variation direction of variable R is representative of a radial deflection of the support that increases globally after time t1; (ii) determining a critical rolling time t2 (t2 > t1) at the end of which variable R reaches a critical value R2 such as R2=R1+ DELTA R, DELTA R being a representative value of a critical increase in the deflection of the support; and (iii) making a distance d2 correspond to said rolling time t2 with d2=V.(t2-t0), said distance representing a prediction of said maximum rolling distance.