The simulation process can be divided.
Finite element simulation of springback in sheet metal forming.
Modern automotive concepts demand a weight reduction by using high strength materials and excellent crash performance which requires innovative simulation techniques.
Finite element analysis fea is the most common method of simulating sheet metal forming operations to determine whether a proposed design will produce parts free of defects such as fracture or wrinkling.
This paper describes new techniques for the sheet metal forming simulation using a local interpolation for tool surfaces proposed by nagata simple local interpolation of surfaces using normal vectors.
Springback can be defined as an elastically driven change of shape of the deformed part upon removal of external loads.
Sheet metal forming is widely used in automotive aviation packaging and household goods.
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Fe finite element simulation of sheet metal forming is an important means to reduce the number of experiments and optimize the process 15 16 17 18.
This phenomenon results in a deviation of the real product geometry from that defined in the design.
2 the results showed negative springback for sheet tensions near the material yield stress contrary qualitatively to all experimental observations.
Computer aided geometric design 2005 22 327 47 and the effect of tool modeling accuracy on springback simulation of a high strength steel sheet.
Collard numerical simulation of springback in sheet metal forming.
Today the metal forming industry is making increasing use of simulation to evaluate the performing of dies processes and blanks prior to building try out tooling.
Proceedings of the eccomas 2000 complas vi european congress on computational methods in applied sciences and engineering barcelona spain 2000 cd rom.
Although finite element analysis fea is successful in simulating complex industrial sheet forming operations the accurate and reliable application of this technique to springback has not been widely demonstrated.
Most sheet metals undergo a combination of bending stretching unbending and reverse bending during the forming process accurate estimation of spring back in these industries is important demands in bend angles can be within a narrow range.
A uniform mesh consisting of 150 plane stress elements for r 9 5 mm and five integration points through the thickness fig.
It is most popular for the manifold technical feasibilities in manufacturing high precision mass production and short processing time.
The first simulations used numerical parameters typical of those in forming analysis.
