Cold Into A Finite Element Numerical Simulation Of The Process

The paper firstly summarizes some things about cold-roll forming and its simulation in our country and international, introduces the work's background and significance. Secondly, beginning as a worker to research simulation of cold-roll forming, in the chapter 2, the paper makes those much abstract Finite Element Method(FEM) theories which are concerned in the numerical simulations of cold-roll forming into concrete planting and necessory proving, then makes them become the theory base of cold-roll forming's FEM simulation. In the chapter 3, the paper simulates and analyzes cold-roll forming progress using ANSYS/LS-DYNA, a large structual analasis program, from constructing cold-roll forming progress' FEM model, to simulating and analyzing cold-roll forming's inducting progress, stable progress, springback progress , and all those progress, then generalizes some valuable informations to real rolling. In the chapter 4, the paper analyzes and simulates springback, the important phenomenon which often exists in the cold-roll forming, has considered some factors which affects springback's simulating precision, such as the element's inch, the meterial hardening model, and moving effects, then uses really the simulating products into directing real manufacturing. In the chapter 5, the paper contrasts and analyzes some simulating results and experimental results, proves that the theory and technology in the paper is able to using in real manufacturing and directing practice in general. Finaly, the paper reviews and concludes the auther's main work and refers some questions which are worthing to researching continuely.In general, the paper's researching results can be generalized to the following:1) Using the large structual analasis program, ANSYS/LS-DYNA, to simulate cold-roll forming progress, analyze the simulating results, and gain the theory and technology which are useful to directing real manufacturing;2) The springback's formula of cold-roll forming isn't found, that's to say, you can't gain a general and precise springback formula. You can only find some main factors which affects it, then analyze one thing once using computer simulating;3) The simulating results tell us: The smaller the element is, the closer the simulating springback is to the reality; Springback's simulating results by using Bilinear Kinemat Model is closer to the reality than by using Bilinear Isotrop Model; The shorter the simulating time, the bigger the moving effects to springback is.