A Coupled Electrical–Thermal–Mechanical Modeling of Gleeble Tensile Tests for Ultra-High-Strength (UHS) Steel at a High Temperature |
| |
Authors: | Changli Zhang Michel Bellet Manuel Bobadilla Houfa Shen Baicheng Liu |
| |
Affiliation: | 1.Key Laboratory for Advanced Materials Processing Technology, Department of Mechanical Engineering,Tsinghua University,Beijing,P.R. China;2.Mines-ParisTech—Centre de Mise en Forme des Matériaux,Sophia Antipolis,France;3.ArcelorMittal, Research and Development,Maizières-lès-Metz,France |
| |
Abstract: | A coupled electrical–thermal–mechanical model is proposed aimed at the numerical modeling of Gleeble tension tests at a high
temperature. A multidomain, multifield coupling resolution strategy is used for the solution of electrical, energy, and momentum
conservation equations by means of the finite element method. Its application to ultra-high-strength steel is considered.
After calibration with instrumented experiments, numerical results reveal that significant thermal gradients prevail in Gleeble
tensile steel specimen in both axial and radial directions. Such gradients lead to the heterogeneous deformation of the specimen,
which is a major difficulty for simple identification techniques of constitutive parameters, based on direct estimations of
strain, strain rate, and stress. The proposed direct finite element coupled model can be viewed as an important achievement
for subsequent inverse identification methods, which should be used to identify constitutive parameters for steel at a high
temperature in the solid state and in the mushy state. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|