... of the metal forming processes as the material behaviour can be characterized in a similar state of stress as the target metal forming process. Moreover, since there is no need for a priori choosing the hardening model, there is no risk for choosing an improper hardening model, which in turn facilitates...

... the factors because the effects of the factors are very complex and studies of wrinkling behavior may show a wide scattering of data even for small deviations in factors. The finite element analyses of wrinkling initiation and growth in sheet metal forming process provide detailed information about...

...Guangyao Li; Ted Belytschko The total Lagrangian formulation and implementation of the element‐free Galerkin method (EFG) is presented for the analysis of contact‐impact problems with large deformations and for the simulation of metal forming processes. An integration scheme based on stress points...

... undergoing the most severe deformations and the numerical results are improved. © MCB UP Limited 2000 Adaptive techniques Gradient Finite elements Error indicators Metal forming In an effort to better understand the sheet forming process, much research has been carried out using...

...R.M. Natal Jorge; Rui P.R. Cardoso; J.M.A. César de Sá The simulation of real industry metal forming processes often requires the presence of adaptive procedures. With that purpose a quadrilateral mesh generator was developed. The algorithm is based on the simple fact that it is always possible...

...Y.K. Lee; D.Y. Yang An easy and robust grid‐based approach is proposed to construct the fully hexahedral mesh in three‐dimensional case and its application for the mesh regeneration or remeshing during the finite element simulation of a metal forming process is presented to show the validity...

...J.J. Anza; M.A. Gutierrez The numerical simulation of metal forming processes follows a highly non‐linear analysis where general aspects such as elastoplasticity, finite deformation and contact mechanics are combined. Approximated solutions obtained by finite element techniques require strong...

...Jean‐Louis Batoz; Ying Qiao Guo; Frederic Mercier An efficient algorithm to estimate the large elasto‐plastic strains encountered in thin sheet metal forming parts has been continuously developed by the authors since 1987. The algorithm is based on a finite element discretization of the known final...

...W.J. Chung; J.W. Cho; T. Belytschko This study is concerned with dynamic effects when we use explicit FEM for sheet metal forming analysis. Since sheet metal forming is a quasi‐static process, time scaling and mass scaling techniques have been widely used in order to save computation time. However...

...S.B. Petersen; B.P.P.A. Gouveia; J.M.C. Rodrigues; P.A.F. Martins This paper presents an algorithm for automatic generation of graded initial quadrilateral meshes targeted for the finite element analysis of metal‐forming processes. Meshing the domain geometry deals with a universe of shapes...

... is used as (Simo et al., 1985): (5) where J = det F. Similarly, the distortional component of the right Cauchy‐Green tensor becomes: (6) © MCB UP Limited 1998 Finite element Flow formulation Metal forming Numerical simulation In many forming...

..., K., Nakano, J. and Mori, K., Finite element method for rigid-plastic analysis of metal forming formulation for finite deformation , International Journal of Mechanical Sciences, Vol. 24, 1982, pp. 459-68. 5. Mori, K., Osakada, K. and Oda, T., Simulation of plane-strain rolling by the rigid...

... and lubrication affect the deformation and strain localization in the automotive sheet metal forming process. Demonstrates a trial of virtual manufacturing incorporating finite‐element simulation, a visualized inspection system and a heuristic process optimization scheme. © MCB UP Limited 1996...

... to be an efficient and robust tool for sheet metal forming, in the automobile industry sheet metal forming is usually a quasi‐static process; therefore seeks to make clear the dynamics of deformation and strain and to evaluate mass scaling, damping scaling and material viscosity scaling parameters. Introduces...

...Shiro Yoshida; Shigefumi Kihara Proposes the particle model as an improved finite element method for the analysis of metal forming, particularly highlighting the forging process. Analyses the forged material in the present modelling in conjunction with non‐material domain, and expresses the process...

...‐step process. A few iterations of the inverse method make it possible to suggest a suitable shape for the preforming tools. © MCB UP Limited 1996 Finite element method Forging Metal forming Tool design Simulation EC 13,2/3/4 190 Inverse problems in finite element simulation of metal...

...Kjell Mattiasson; Lars Bernspång; Alf Samuelsson Argues that the dynamic‐explicit approach has in recent years been successfully applied to the solution of various quasi‐static, elastic‐plastic problems, especially in the metal forming area. A condition for the success has, however, been...

... nodal stress values, recovered from a local continuous polynomial expansion, and those given by the numerical solution. Assesses the code developed, using experimental results. © MCB UP Limited 1996 Finite element method Forging Metal forming Simulation model for hot and cold forging...

... mechanics. The merits of using the consistent tangent matrix and the necessity of accumulation of design derivatives of stresses and internal parameters are indicated. Aspects of sensitivity problems in metal forming are also discussed. A number of examples illustrate the paper. © MCB UP Limited 1995...

...G. DE SAXCE; Z.Q. FENG; G. TOUZOT This paper is devoted to the analysis of metal forming with assumption of rigid‐plastic behaviour with strain hardening. As opposed to the classical rate problem formulation based on Markov's principle and the explicit scheme, a more satisfactory incremental...