RT journal article
T1 Comparative studies of hyperbolic sine constitutive models for constant pressure superplastic tests
A1 García Barrachina, Luis
A1 Gámez López, Antonio Juan
A2 Ingeniería Mecánica y Diseño Industrial
K1 Modelling
K1 Constitutive Parameters
K1 Hyperbolic Sine Model
K1 Free-Inflation Test
AB The constant pressure free-inflation test is a very versatile and simple tool for analyzingdifferent features of superplastic forming. In recent years, different methods have been proposedto measure constitutive parameters of the stress–strain relationship for the superplastic material,specifically the K and m parameters of the power law model. However, this law is restricted to beused in narrow strain-rate ranges, and poor results are obtained when applied in a broaderspectrum. To overcome this problem, numerous constitutive models covering the full strain-raterange applicable in superplastic forming have been proposed historically, including the hyperbolicsine equation. However, there is no clear consensus on the type of hyperbolic sine function to use.Some authors include a sensitivity parameter while others do not. This article aims to study thecharacteristics of the hyperbolic sine constitutive model, checking which of the historicallyproposed models achieves better results in the test at free deformation and constant pressure.
PB Materials Research Forum LLC
SN 2474-395X
YR 2023
FD 2023
LK http://hdl.handle.net/10498/31840
UL http://hdl.handle.net/10498/31840
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 10-may-2026