Análisis teórico-numérico-experimental de un proceso de hidroconformado usando diámetro equivalente

Abstract

The main goal of this work is to propose the

application of the concept of equivalent

diameter in the calculation of the hydraulic

pressure required to conduct an hydroforming

process in non-circulars pieces. Although

this approach was carried out initially for the

conventional stamping process, this paper

demonstrates that it can also be applied in

hydroforming.

In a first phase experimental tests were carried

out to form a part using this methodology,

measuring the reduction in resulting thickness.

It was found that difference between the

calculated pressure and the experimental

required pressure was 2.6%.

To perform a numerical-experimental

comparison, the simulation of the process was

carried out using several material models by

explicit finite element method in a commercial

software. It was observed that using the material

model HILL’90 deviation between experimental

and numerical results for the thickness reduction

was lower than 5.5%.