Plane elastic contact for a rigid flat-ended punch and a half-space with rough boundary is studied. Taking into account friction forces it is shown that a partial slip near punch edges can exist. The size of the slip zone is unknown and depends on the contact parameters. The problem is reduced to the system of integral equations, which are being solved numerically.
The problem of the automobile course stability is considered. The change of the car steerability based on the analysis of non linear bicycl model is analyzed. Generalized dependence determining “the steerability curve” is obtained. Conditions which caused the loss of stability with increasing speed while moving within the constant radius circle regarding the bifurcation set are analyzed.