The three dimensional model for 11.00R20 truck and bus radial tire in the ground contact area was established by using Abaqus finite element analysis software,and the ground contact performance of the tire was investigated.When the inflation pressure increased,the load value also increased at which the contact stress distribution started to distort into the distribution of low stress in the middle and high stress on the edge.As the tire deformation increased,the contact area transformed from ellipse shape into a rectangle,and the high pressure area shifted from the center part of contact area to tire shoulder.Among different operation conditions,the ground contact area under static state was the biggest.Under free rolling,with increase of speed,the longitudinal length of ground contact area increased,the horizontal length decreased,but the total contact area increased,and the counterforce also increased.The influence of friction coefficient on the free rolling radius of the tire was not significant.However,when the friction coefficient increased,the longitudinal shear stress increased,and thus the tread wore out faster.As the slip angle increased,the high stress area moved to one side,and the shape of contact area changed to a triangle. |