Thermo-mechanical finite element model of shell behavior in continuous casting of steel

Chunsheng Li, Brian G. Thomas

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A finite-element model, CON2D, has been developed to simulate temperature, shape, stress, and hot-tear crack development during the continuous casting of steel, both in and below the mold. The stress model features an elastic-viscoplastic creep constitutive equation that accounts for the different responses of the liquid, semi-solid, delta-ferrite, and austenite phases. Temperature and composition-dependent functions are also employed for properties such as thermal linear expansion. A contact algorithm prevents penetration of the shell into the mold wall due to the internal liquid ferrostatic pressure. An efficient two-step algorithm has been developed to integrate these highly non-linear equations. An inelastic strain-based criterion is developed to predict damage leading to hot-tear crack formation, which includes the contribution of liquid flow during feeding of the mushy zone. The model is validated with an analytical solution for temperature and stress in a solidifying plate. It is then applied to predict the maximum casting speed to avoid crack formation due to bulging below the mold during casting of square steel billets.

Original languageEnglish (US)
Title of host publicationModeling of Casting, Welding and Advanced Solidification Processes
EditorsD,M. Stefanescu, J.A. Warren, M.R. Jolly, M.J.M. Krane, D.M. Stefanescu, J.A. Warren, M.R. Jolly, M.J.M. Krane
Pages385-392
Number of pages8
StatePublished - 2003
EventProceedings of the Tenth International Conference on Modeling of Casting, Welding and Advanced Solidification Processes - Destin, FL, United States
Duration: May 25 2003May 30 2003

Publication series

NameModeling of Casting, Welding and Advanced Solidification Processes

Other

OtherProceedings of the Tenth International Conference on Modeling of Casting, Welding and Advanced Solidification Processes
Country/TerritoryUnited States
CityDestin, FL
Period5/25/035/30/03

ASJC Scopus subject areas

  • General Materials Science
  • Mechanical Engineering

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