Simulation of multi-step sheet metal forming processes by a static explicit FEM code

Kawka, Mateusz; Kakita, Tohru; Makinouchi, Akitake

doi:10.1016/s0924-0136(98)00133-2

Cited by 31 publications

(23 citation statements)

References 4 publications

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“…This results in higher computational times. However, for complex geometries involving complex strain-paths solid elements give more accurate results [45]. For instance, solid elements are required for accuracy in FE springback simulation when the ratio between the tool radius and blank thickness is lower than 5 [46].…”

Section: Integration Algorithmsmentioning

confidence: 99%

Algorithms and Strategies for Treatment of Large Deformation Frictional Contact in the Numerical Simulation of Deep Drawing Process

Oliveira

Alves

Menezes

2008

Arch Computat Methods Eng

118

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This paper describes a fully implicit algorithm developed and optimized to simulate sheet metal forming processes. This algorithm was implemented in the inhouse code DD3IMP. Attention is paid to the augmented lagrangian method adopted to treat the contact with friction problem. The global resolution of the coupled equilibrium and contact problem is performed in a single loop, with a static implicit iterative Newton-Raphson scheme. This demands particular attention in the contact search algorithm, which in this case adopts a parametric description of the tools. In order to highlight the adopted strategies a review of the state-of-the-art in sheet metal forming simulation is presented, with respect to models reliability and efficiency.

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Section: Integration Algorithmsmentioning

confidence: 99%

Algorithms and Strategies for Treatment of Large Deformation Frictional Contact in the Numerical Simulation of Deep Drawing Process

Oliveira

Alves

Menezes

2008

Arch Computat Methods Eng

118

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“…These requirements were strongly supported by new innovative forming processes, for example, forming of tailor-welded blanks [8], hydroforming, etc., and they are absolutely essential for multi-stage forming processes [9], too.…”

Section: Finite Element Simulation In Metal Formingmentioning

confidence: 99%

Numerical modelling and simulation in sheet metal forming

Tisza

2004

Journal of Materials Processing Technology

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The application of the methods of Computer Aided Engineering in sheet metal forming is looking back for several decades. It covers a wide range of activities from the product design through the process planning and process control including sophisticated methods of modelling and simulation. Among the CAE activities, recently the development of Knowledge Based Systems has become an emerging field. Most of the available Knowledge Based Systems are based on simplified plasticity theory and empirical technological rules. Therefore, they are usually not able to give accurate solutions and reliable predictions for complicated forming processes. In the last two decades, significant progress has been also achieved in the numerical modelling of forming processes. In spite of the enormous development of hardware and software facilities, the exclusive use of numerical modelling still seems to be very time-and cost consuming. Therefore the integration of these two fields has great practical importance. In this paper, the challenges and opportunities of the integration of Knowledge Based Systems and Finite Element Modelling in the process planning of multi-step sheet forming processes will be given.

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“…In other words, since the stress distribution at bottom dead center determines the deformation of the product after stress release. For accurate simulation of the contact state, it is effective to reduce the space discretization error due to the finite element (FE) and to select an appropriate contact model [5,6]. However, in general, calculation using the analysis condition to decrease discretization errors increases the computation time.…”

Section: Introductionmentioning

confidence: 99%

A novel approach of springback analysis using a drawbead and a die shoulder database in sheet metal forming simulation

Iwata

2017

Int J Adv Manuf Technol

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Springback in sheet metal forming is a deformation that occurs when a workpiece is released from dies after forming. Prediction of springback using the finite element method (FEM) has been used in the design of stamping dies. The present paper describes an effective approach by which to improve the accuracy of springback analysis, which can also suppress the increase in the calculation time. In general, FEM using the analysis condition to decrease discretization errors greatly increases the computation time. The proposed procedure is as follows: (1) Quick analysis using a large mesh size is performed. (2) Data mapping and morphology mapping for the forming results are then performed using the database based on a detailed partial analysis of the drawbead and the die shoulder. (3) Springback analysis is performed using the forming results modified by the data mapping and morphology mapping. A forming experiment was conducted to confirm that the proposed method using the database greatly improves the prediction accuracy of the shape after springback and also suppresses the increase in calculation time.

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Simulation of multi-step sheet metal forming processes by a static explicit FEM code

Cited by 31 publications

References 4 publications

Algorithms and Strategies for Treatment of Large Deformation Frictional Contact in the Numerical Simulation of Deep Drawing Process

Algorithms and Strategies for Treatment of Large Deformation Frictional Contact in the Numerical Simulation of Deep Drawing Process

Numerical modelling and simulation in sheet metal forming

A novel approach of springback analysis using a drawbead and a die shoulder database in sheet metal forming simulation

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