AN IMPROVED THERMAL-STRUCTURAL FINITE ELEMENT MODEL FOR MANUFACTURING PROCESSES WITH HEAT GENERATION

000008776 001__ 8776
000008776 005__ 20141204083519.0
000008776 04107 $$aeng
000008776 046__ $$k12/05/2014
000008776 100__ $$aÉcsi, L.
000008776 24500 $$aAN IMPROVED THERMAL-STRUCTURAL FINITE ELEMENT MODEL FOR MANUFACTURING PROCESSES WITH HEAT GENERATION

000008776 24630 $$n20.$$pEngineering Mechanics 2014
000008776 260__ $$bBrno University of Technology- Institute of Solid Mechanics, Mechatronics and Biomechanics
000008776 506__ $$arestricted
000008776 520__ $$2eng$$aIn this paper a universal mathematical model capable of predicting thermo-mechanical behaviour of various types of metal during their manufacturing using fully coupled thermal-structural finite element analysis is presented. The model takes into account the internal damping of the material, elastic and plastic heating and it can be used in wide range of strain rates that accompany the deformation of the body. In the model finite element implementation an improved heat equation, the updated Lagrangian formulation, the NoIHKH material model and the Jaumann rate in the form of the Green-Naghdi rate in the co-rotational Cauchy’s stress tensor integration have been used. Cyclic tension of a notched aluminium specimen has been studied using prescribed axial deformation and a sine function with linearly increasing amplitude and 2 Hz frequency in the run-up stage of the test and a sine function with constant amplitude and linearly increasing frequency in the operation stage of the test. A few selected analysis results are presented and briefly discussed. The analysis results are very positive and the authors believe that the model might open new perspectives in the study and numerical simulations of metals.

000008776 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000008776 653__ $$aThermal-structural analysis, Strong coupling, Finite strain elastoplasticity, Internal damping, Elastic, Plastic and internal damping induced heating, Wide range of strain rates.

000008776 7112_ $$aEngineering Mechanics 2014$$cSvratka (CZ)$$d12/05/2014 - 15/05/2014$$gEM2014
000008776 720__ $$aÉcsi, L.$$iJančo, R.$$iÉlesztős, P.
000008776 8560_ $$ffischerc@itam.cas.cz
000008776 8564_ $$s538367$$uhttp://invenio.itam.cas.cz/record/8776/files/28-Ecsi-CD.pdf$$yOriginal version of the author's contribution as presented on CD, paper No. 28.
000008776 962__ $$r70
000008776 980__ $$aPAPER

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