Advanced Techniques and Painless Procedures for Nonlinear Contact Analysis and forming simulation via Implicit FEM
Nonlinear contact analysis including forming simulation via finite element methods has a crucial and practical application in many engineering fields.However,because of high nonlinearity,nonlinear contact analysis still remains as an extremely challenging obstacle for many industrial applications.The implicit finite element scheme is generally more accurate than the explicit finite element scheme,but it has a known challenge of convergence because of complex geometries,large relative motion and rapid contact state change.It might be thought as a very painful process to diagnose the convergence issue of nonlinear contact.Most complicated contact models have a great many contact surfaces,and it is hard work to well define the contact pairs using the common contact definition methods,which either result in hundreds of contact pairs or are time-consuming.This paper presents the advanced techniques of nonlinear contact analysis and forming simulation via the implicit finite element scheme and the penalty method.The calculation of the default automatic contact stiffness is addressed.Furthermore,this paper presents the idea of selection groups to help easily and efficiently define contact pairs for complicated contact analysis,and the corresponding implementation and usage are discussed.Lastly,typical nonlinear contact models and forming models with nonlinear material models are shown in the paper to demonstrate the key presented method and technologies.
Nonlinear Contact Analysis Penalty Method Implicit Analysis Selection Group FEM
Shoubing Zhuang
Autodesk Inc.,285 Kappa Drive,Suite 250,Pittsburgh,PA 15238,USA
国际会议
沈阳
英文
499-504
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）