Study On New Shell Element And Application In Rollforming

Roll forming process is a complicated process, the advanced high strength steel got a more and more extensive application in recent years, having a very high hardening rate because of that material, making it model iner common use low carbon steel plate of process to increase a difficulty, especially how to control the springback of sheet metal, have become a crux that roll forming process the advanced high strength steel.The FEA is acquire more and more applications in the Roll forming process, that method usually can get a better result, but the springback of the problem result to the processing for simulating resule really not enough ideal usually, the reason is various, simulation method to exist and fulfil among them reasonable of place, this should be a deserve improvement of place, usually the thick stresses of new shell element is smaller,it is neglect, but the Cape part of roll forming to exist big flection to transform, analyzing enunciation to exist in that part bigger thick stresses, so develop a kind of consider thick stresses shell element is a meaningful work.This kind of consider thick stresses new shell element, nears to really stress and strain of the roll forming process because of its mechanics model,the contingency appearance, as a result simulating roll forming process with it to then near to an actual circumstance more,sheet metal process to simulate more truely,is a foundation of roll forming simulation process, It will provide a basis for the control of springback of roll forming of sheet metal.The paper deduces the formula of the new shell element form selecting element respect, use fortran to process programming of the user definition element(UEL). According to the sub- procedure UEL of ABAQUS to the actual circumstance of contact problem, the model of roll forming has to be carried on a valid simplification to make sure that by expect an analysis of the most simple model reach to the result that near most to a real circumstance. The paper compare the shell element S4R of no account of thick stress with developed of the new shell element of calculation result, The analysis result prove the new shell element is a kind element of the most approximate practical situation, embody the value of the development.The consideration thick stress new shell element of development is not only make up the traditional shell element abridging thick stress component, also compensate the shortage of continuum element in sheet metal forming. Make it in the numerical simulation calculation not only save time, attain high efficiency and accuracy, create new field for the selecting element of the numerical simulation calculation, and provide a more dependable data for the engineering practice.