Comprehensive Properties Of DP Steel Parts For Material Properties Research On Analysis And Optimization Design

In the increasingly competitive automotive industry,product quality upgrading is the key to enhancing the competitiveness of the industry.More and more car companies are beginning to select and research new high-strength steel materials.At the same time,new technical problems are also coming.Studies have shown that many frequently occurring process diseases of stamping parts are caused by improper part development and material selection.Generally,the defects generated during part development and material selection will be hidden until the end of the process preparation.The means to improve the process to make up for the defects will cost a huge amount of money,resulting in a relatively low efficiency of improvement.At the same time,the material preparation stage will be affected by the selection of parts.How to coordinate the contradiction between part development and material customization is optimization The best means of comprehensive performance of parts.The effective way to optimize the comprehensive performance of the parts is to combine efficient unit technology,mathematical statistics methods and reasonable optimization methods to optimize the design of the main performance of the parts.In the face of these problems and methods,this paper will use a typical passenger car The anti-collision beam crossbeam is taken as the research object,and an optimized design method is selected to analyze the influence of the comprehensive performance of DP590 steel parts facing the material parameter fluctuations.The actual research contents are as follows:Firstly,Comprehensively and systematically introduce the theoretical basis and evaluation indexes of sheet metal forming,energy absorption of anti-collision beam and rigid strength of anti-collision beam,thus establishing the comprehensive performance evaluation system of DP590 parts.Secondly,Introduce the material parameters that affect the main performance of the DP590 steel anti-collision beam beam.Summarize certain parts and materials selection and development experience.and establish the finite element model of the performance analysis of the parts through the finite element software Autoform,Hypermesh and the solvers Lsdyna and Optistruct.Finally,In view of the shortcomings of the existing optimization methods,a comprehensive performance analysis and optimization design research method of DP590 steel parts for material parameter fluctuations is proposed.In order to convert the multi-objective problem into a single-objective problem for easy research and analysis,and then to summarize the influence of multiple material factors on the comprehensive performance of the front bumper beam of the car,orthogonal test and gray correlation method are used to obtain better design parameters.Based on the concept and theoretical advantages of the gray system,and referring to the calculation steps of the gray correlation method in detail,then by optimizing the yield strength(Rp0.2),tensile strength(Rm),elastic modulus(E)and shear modulus of the material DP590 Quantify(G)the four material parameters to optimize the thinning rate and reduce the risk of cracking,while achieving the desired results of improving the crash resistance and stiffness of the part.Finally,through the experimental data to make research conclusions,well guide the parts development and material selection.