Accession Number : ADA295599

Title :   Numerical Simulation of Aluminum Extrusion Processes.

Descriptive Note : Final rept. 15 Feb 95-15 Apr 95,

Corporate Author : TECHNICAL MANAGEMENT CONCEPTS INC BEAVERCREEK OH

Personal Author(s) : Hughes, T. J. ; Muller, A.

PDF Url : ADA295599

Report Date : APR 1995

Pagination or Media Count : 25

Abstract : This presentation describes a research program directed towards the development of automated design procedures for aluminum extrusion technology. The objective is to eliminate costly trial and error by being able to simultaneously design the product, die, billet, and process (e.g.. extrusion temperatures and speeds, uniformizing metal flow, etc.), within constraints of feasibility, and satisfying objectives including, but not limited to, optimizing shape, surface finish, and properties of the product, processing costs, time to market, and full utilization of capabilities. The approach is based on the development of efficient and effective analysis of the whole processing system employing newly developed finite element solution technologies for complex, multi region, multiphysical behavior. Generalizations of these methodologies to include Arbitrary Lagrangian-Eulerian (ALE) mesh descriptions for nonlinear, elastic viscoplastic mechanical constitution equations will allow the faithful modeling of the metal flow within the die system and the accurate attainment of final shape upon exit. Automatic meshing and adaptive remeshing will insure efficient and accurate simulation of the entire forming process. New element technologies facilitating the use of general meshing procedures for difficult metal-forming processes involving a variety of kinematical constraints, such as incompressibility, contact, etc., are utilized. Feature based design methodologies, parametric modeling, and knowledge-based engineering techniques will constitute the fundamental methodologies for representing designs, managing the hierarchy of analysis models, performing model reduction and feature removal, and effectively utilizing design knowledge. (AN)

Descriptors :   *COMPUTER AIDED DESIGN, *EXTRUSION, *KNOWLEDGE BASED SYSTEMS, VISCOPLASTICITY, MATHEMATICAL MODELS, COMPUTERIZED SIMULATION, REMOVAL, OPTIMIZATION, PARAMETRIC ANALYSIS, AUTOMATION, COST EFFECTIVENESS, FINITE ELEMENT ANALYSIS, DEFORMATION, VISCOELASTICITY, SHAPE, ACCURACY, MESH, REDUCTION, BILLETS(MATERIALS), FLOW FIELDS, SOLUTIONS(GENERAL), ALUMINUM, TWO DIMENSIONAL FLOW, NUMERICAL METHODS AND PROCEDURES, HIERARCHIES, STEADY FLOW, DIE CASTING, METAL FORMING PRESSES.

Subject Categories : Fabrication Metallurgy
      Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE