全钢子午线轮胎疲劳破坏现象仿真与优化设计研究

基于有限元的轮胎疲劳寿命评价方法,建立295/80R22.5全钢子午线轮胎的有限元模型。使用ABAQUS隐式分析方法获得轮胎的应变、应力以及应变能密度等基本参数后,根据轮胎实际使用中的破坏情况选择影响疲劳寿命的评价指标。结果表明:高速耐久工况下,应选择应变能密度和帘线张力作为影响疲劳寿命的评价指标,而且适当增加带束胶厚度能有效提高轮胎的疲劳寿命;低速重载工况下,应当选择帘线和橡胶间的剪应力(层间剪应力)作为影响疲劳寿命的评价指标,且适当降低胎体帘布层和补强层的高度能有效提高轮胎的疲劳寿命。

Simulation Analysis of Fatigue Failure of All-steel Radial Tire and Structure Optimization

On the basis of tire fatigue life evaluation method, finite element model of all-steel radial tire 295/80R22.5 were built. After getting access to the parameters like strain, stress, strain energy density etc. with ABAQUS implicit algorithm, tire fatigue life evaluation parameters were identified based on the actual failure modes. Research results indicate, under the endurance and high speed condition, that strain energy density and rebar tension force should be chose as the tire fatigue life evaluation parameters. Appropriately increased thickness of the composite between belt 2 and belt 3 can lengthen the fatigue life effectively. Under the condition of overload and low speed, shear stress between rebar element and rubber should be chose as the tire fatigue life evaluation parameter. Appropriately reduced height of the carcass edge and strengthening layer can lengthen the fatigue life effectively.