Solution to Shoulder Cracking Problem of 11.00R20 Truck and Bus Radial Tire Used in Mixed Pavement and Heavy-loading Working Conditions
Aiming at the shoulder cracking problem of 11.00R20 truck and bus radial tire used in mixed pavement and heavy-loading working conditions,a system analysis model was established,and the tire structure was improved by optimizing the construction design and adjusting the material distribution.The effectiveness of the improvement direction was verified through model analysis,finite element analysis,indoor tests and practical use,that was,reducing the thicknesses of tread compound,shoulder pad compound and sidewall compound,optimizing the transition of triangular compound,selecting 3+9+15×0.225ST steel cord for carcass and adjusting to one layer nylon reinforcement layer design for bead could increase the durability of the tire bead significantly,so that the shoulder cracking problem was effectively solved.It was proposed that systematic thinking should be established in the structural improvement process of tires,and systematic adjustments should be made while improving the failed parts,which had a positive impact on the service life and maximum utilization of materials.
truck and bus radial tiremixed pavement and working conditionshoulder crackingdurability of tire beadfinite element analysis
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