Accession Number : ADA304016

Title :   Large Deformation Analysis of Nonlinear Homogeneous and Heterogeneous Media Using an Adaptive Arbitrary Lagrangian-Eulerian Finite Element Method.

Descriptive Note : Final rept. 16 Aug 91-30 Sep 95,

Corporate Author : OHIO STATE UNIV COLUMBUS

Personal Author(s) : Ghosh, Somnath

PDF Url : ADA304016

Report Date : NOV 1995

Pagination or Media Count : 174

Abstract : Research has been conducted to advance the state of the art in (a) multiple scale modeling of advanced heterogeneous materials, (b) in large deformation analysis of solids with applications in metal forming, and also (c) in solidification modeling. For modeling heterogeneous materials (a), a new Voronoi Cell finite element model has been developed which naturally evolves from the microstructure. Formulations have been developed for thermo-dasticity, elasto-plasticity and heat conduction. This is then cast in multiple scale modeling of heterogeneous (porous and composite) materials by combining with asymptotic homogenization theory. In (b), an adaptive arbitrary Lagrangian-Eulerian (ALE) finite element method has been developed for solving metal forming problems with strain localization. The ALE mesh movement is coupled with r-adaptation to minimize element distortion, and with s-adaptation to achieve local enrichment. Finally heat transfer analysis for solidification problems has been conducted to evaluate the temperature field and location of the phase change interface using the ALE description. (AN)

Descriptors :   *FINITE ELEMENT ANALYSIS, *DEFORMATION, *ELASTOPLASTICITY, *THERMOELASTICITY, KINEMATICS, MATHEMATICAL MODELS, MICROSTRUCTURE, STRESS ANALYSIS, PHASE TRANSFORMATIONS, COMPOSITE MATERIALS, STRUCTURAL ANALYSIS, MODULUS OF ELASTICITY, SOLIDIFICATION, STRAIN(MECHANICS), THERMAL ANALYSIS, THERMAL CONDUCTIVITY, HETEROGENEITY, NONLINEAR ANALYSIS, EULER EQUATIONS, DISTORTION, CONDUCTION(HEAT TRANSFER), POROUS MATERIALS, SURFACE TENSION, VARIATIONAL PRINCIPLES, HOMOGENEITY, LAGRANGIAN FUNCTIONS, METALWORKING.

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE