Finite Element Analysis And MATALB Programming Of Thermal Stress Field For Cylinder Under The Impact Of Thermal-mechanical Coupling

It is increasingly prominent and widespread for engineering problems with thermal stress, such as barrel, piston of the diesel engine, spindle of machine tools, etc. Those kind of axisymmetric structures with cylinder shape are under both thermal load and mechanical load of high frequency, so the influence of heat must be fully taken into account when do stress calculation on these conditions.But in the present, the calculation of thermal stress is limited to simulation by foreign commercial finite element software. First, do a thermal analysis, then make a structural analysis, in other words, two analysis are needed to get the final results. While, in domestic, finite element analysis program softwares with independent intellectual property rights are rare and scarce.For this purpose, this paper mainly do works in the following several aspects:1. In the MATLAB platform, finite element analysis program is totally compiled and debugged successfully for solving thermal stress field in axial symmetry model.2. To check the correctness of MATLAB program written in this paper, simulation is done by finite element commercial software ANSYS for the same simulation parameters including the size of structure model, physical parameters, load and boundary conditions, unit grid and so on. Results are reasonable, and then the effectiveness of finite element calculation program is verified.3. Make full use of powerful graphics functions in MATLAB, and make a study of visual graphic display for calculation results of temperature field and thermal stress field by the program.4. The GUI interface is designed and all existing compiled programs are encapsulated and integrated into the interior of interface. In this case, users can conveniently analyze practical problems according to their need by directly calling and running programs. At the same time, on the basis of existing developed program, in-depth development can be directly carried on and continued according to the need, avoiding the basic and repeated work.