Comparative Study On The Durability Of The Wide Based Single Tire And Double Tire For Commercial Vehicles Based On ABAQUS

With the flourishing development of China’s automotive industry, auto-related policiesand regulations increasingly improve and gradually joint tracks with internationalautomotive technologies. As government put more control efforts on overloaded trucks,many commercial vehicles manufacturers sponsor great investment on the design anddevelopment of lightweight trucks. Coincidentally, wide based single tire attracts theeyeballs due to its distinct advantage over weight and fuel consumption. However,commercial vehicles mainly travel long distances and we must take the original design loadrequirements into consideration to ensure driving safety if wide based single tire take placeof traditional double tires. There is no document data to be found aimed at the problem, sothis dissertation makes comparative study on the durability of wide based single tire anddouble tire for commercial vehicles based on ABAQUS.This dissertation studies the durability of tires with computer simulation technology. Itcombines FEA technology and test methods together. The detailed implementation plan is asfollows.(1) Put forward a method to simplify the AutoCAD tire model and the principle todivide in HYPERMESH tire grid. The model takes the impact of the transverse tread patterninto account.(2) Establish FE models of wide based single tire and double tires respectively intwo-dimensional inflated conditions, three-dimensional inflated conditions and static loadconditions. The model considers the tire contact area with the ground grid in detail and theaccuracy and availability is verified through the radial stiffness test.(3) With respect to the durability of the inner tire part, it mainly focuses on the ends ofthe belt ply and bead cloth. The first study is the durability of rubber areas. Extract the strainenergy density, strain and Mises stress of bead portion and the crown portion of180°crosssection at two-dimensional inflated conditions and static load conditions state. Evaluate thedurability of bead portion and crown portion and analyze dangerous element to providefoundation on the research of durability of the whole tire. In accordance with the formeranalysis result, make comparative analysis of single wide tires and dual tires. It shows thatthe dangerous area distribute at the border of carcass, carcass frame and belt ply in thecourse of driving. (4) For three-dimensional static load model in ABAQUS, considering errors in themiddle part of it and tread-ground contact areas, choose two-dimensional inflated conditionsand static load conditions both in160°and180°cross section to make comparative analysisof two tires in belt ply, bead wire and carcass cords. It shows that the dangerous areadistribute at the border of belt ply, shoulder and near the bead wire.(5) Through research on the main ground stress and shear stress distributions. We canevaluate the durability of the entire tire. Considering friction or not, in both cases extract thecontact surface of the tire for analysis. Through comparison, we can found that whenconsidering friction, the distribution characteristic is more obvious. Select vertical (travelingdirection of the wheel) and lateral central node and make normal stress curve for analysiswhich indicates that tire shoulder is not the single area suffered the largest force, centraltread grooves of the tread edges and corners are also under a lot of stress, and the analysisresults are affected by pattern.(6) Based on the above, one can draw a conclusion that concluded:425/65R22.5hasless aspect ratios than12R22.5, but gain contact area with the ground, so it has moreuniform distribution of stress which will improve abrasion character. However, as mainenergy losses arise from friction generated by internal tire when contacting with ground andthe internal stress and strain of425/65R22.5is significantly greater than12R22.5, therefore,the driving temperature of425/65R22.5is higher, and life of it is less than12R22.5. It isrecommended that manufacturers should take a number of factors into account whenreplacing tires.