Coupled finite element simulation and optimization of single- and multi-stage sheet-forming processes

A forming sequence of one-piece automobile steel wheels without welding was designed. In this forming process, the one-piece wheel was formed from a circular blank only by multi-stage stamping operations, and a deeply drawn cup was formed into the wheel. Two humps of the rim flange for fixing the tire were formed in the flaring and flanging stages. The humps of the rim in the opening and outer side were formed by buckling the inner flange of the rim, and by swelling the outer flange with an upper die having a short land, respectively. In addition, the number of stages was considerably reduced from 16 stages to only 9 stages by combining the deep drawing and ironing stages and by adding a holding die in the flaring stages. The forming sequence of the one-piece wheels was evaluated by both finite element simulation and miniature experiment.

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Finite Element Simulation and Experimental Study of the Effect of Cone Parameter on Thickness Distribution in Hydroforming of Conical-Cylindrical Cups

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.189-193.2634 ◽

2011 ◽

Vol 189-193 ◽

pp. 2634-2637

Author(s):

Abdol Hamid Gorji ◽

M. Bakhshi ◽

S. Nourouzi ◽

S.J. Hosseinipour ◽

G. Mohammad-Alinejad

Keyword(s):

Finite Element ◽

Finite Element Simulation ◽

Metal Forming ◽

Thickness Distribution ◽

Blank Holder ◽

Sheet Surface ◽

Multi Stage ◽

Element Simulation ◽

Tip Radius ◽

Explosive Forming

Forming conical parts is one of the complex and difficult fields in sheet metal forming processes; because of the low contact area of the sheet with the punch in the initial stages of forming, too much tension is applied to the sheet causing burst occurrence. Furthermore, since the major part of the sheet surface between the blank holder and punch tip is free, wrinkles appear on the wall of the drawn parts. Therefore, these parts are normally formed in the industry by spinning, explosive forming or multi-stage deep drawing processes. In this paper, the parameters in the process of hydroforming conical parts along with using finite element simulation and experimental procedures have been studied. The punch radiuses parameters (the punch tip radius and the radius between the conical and cylinder section and their effects on the bursting and thickness distribution were investigated.

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Piezoelectric Two Layer Plate for Position Stabilization

Volume 1: Development and Characterization of Multifunctional Materials; Modeling, Simulation and Control of Adaptive Systems; Structural Health Monitoring ◽

10.1115/smasis2012-8230 ◽

2012 ◽

Author(s):

Martin Krause ◽

Daniel Steinert ◽

Eric Starke ◽

Uwe Marschner ◽

Günther Pfeifer ◽

...

Keyword(s):

Finite Element ◽

Finite Element Simulation ◽

Network Model ◽

Inertial Frame ◽

System Simulation ◽

Simulation And Optimization ◽

Laboratory Setup ◽

Element Simulation ◽

Rigid Connection ◽

Simulation Results

Numerous vibrating electromechanical systems miss a rigid connection to the inertial frame. An artificial inertial frame can be generated by a shaker which compensates for vibrations. In this paper we present an encapsulated and perforated unimorph bending plate for this purpose. As basis for system simulation and optimization a new 3-port multi domain network model was derived. An extension of the network allows the simulation of the acoustical behavior inside the capsule. Network parameters are determined using Finite Element simulations. The dynamic behavior of the network model agrees with the Finite Element simulation results up to the first resonance of the system. The network model was verified by measurements on a laboratory setup, too.

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