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http://dx.doi.org/10.5000/EESK.2004.8.2.019

Finite Element Formulation for the Finite Strain Thermo-Elasto-Plastic Solid using Exponential Mapping Algorithm : Model and Time Integration Scheme  

박재균 (단국대학교 토목환경공학과)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.8, no.2, 2004 , pp. 19-25 More about this Journal
Abstract
The linear analysis for the balance of linear momentum of a structure is relatively easy to perform, but the error becomes large when the structure experiences large deformation. Therefore, the material and geometric nonlinearity need to be considered for the precise calculations in that case. The plastic flow of a ductile steel-like metal mainly transforms its dissipated mechanical energy into heat, which transfers under the first and second law of thermodynamics. This heat increases the temperature of the material and the strength of the material decreases accordingly, which affects mechanical behavior of the given structure. This paper presents a finite-strain thermo-elasto-plastic steel model. This model can handle large deformation and thermal load simultaneously, which is common during earthquake periods. Two 3-dimensional finite element analyses verify this formulation.
Keywords
nonlinear large deformation; thermo-elasto-plastic model; 3-dimensional finite element analysis;
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