A thermomechanical model for the analysis of light alloy solidification in a composite mould

Celentano, Diego, Gunasegaram, Dayalan and Nguyen, Thang (1999) A thermomechanical model for the analysis of light alloy solidification in a composite mould. International Journal of Solids and Structures, 36 16: 2341-2378.


Author Celentano, Diego
Gunasegaram, Dayalan
Nguyen, Thang
Title A thermomechanical model for the analysis of light alloy solidification in a composite mould
Journal name International Journal of Solids and Structures   Check publisher's open access policy
Publication date 1999-06-01
Sub-type Article
DOI 10.1016/S0020-7683(98)00114-0
Volume number 36
Issue number 16
ISSN 0020-7683
Start page 2341
End page 2378
Total pages 38
Editor C. Steele
Place of publication UK
Publisher Elsevier Science
Collection year 1999
Language eng
Subject C1
291403 Alloy Materials
671004 Castings
Abstract A coupled thermomechanical model to simulate light alloy solidification problems in permanent composite moulds is presented. This model is based on a general isotropic thermoelasto-plasticity theory and considers the different thermomechanical behaviours of each component of the mould as well as those of the solidifying material during its evolution from liquid to solid. To this end, plastic evolution equations, a phase-change variable and a specific free energy function are proposed in order to derive temperature-dependent material constitutive laws. The corresponding finite element formulation and the staggered scheme used to solve the coupled nonlinear system of equations are also presented. Finally, the temperature and displacement predictions of the model are validated with laboratory measurements obtained during an experimental trial. (C) 1999 Elsevier Science Ltd. All rights reserved.
Keyword Mechanics
Casting Process
Light Alloy Solidification
Permanent Composite Mould
Coupled Thermomechanical Analysis
Temperature-based Formulation
Air-gap Formation
Behavior
Metals
Q-Index Code C1

Document type: Journal Article
Sub-type: Article
Collection: School of Mechanical & Mining Engineering Publications
 
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