Accession Number:

ADA300940

Title:

A Fast Numerical Method for Isothermal Resin Transfer Mold Filling,

Descriptive Note:

Technical letter,

Corporate Author:

MINNESOTA UNIV MINNEAPOLIS

Report Date:

1994-05-13

Pagination or Media Count:

22.0

Abstract:

An efficient numerical scheme is presented for simulating isothermal flow in resin transfer molding RTM. The problem involves transient, free-surface flow of an incompressible fluid into a nondeforming porous medium. A new variant of the control volume finite element CVFE algorithm is explained in detail. It is shown how the pressure solutions at each time step can be obtained by adding a single row and column to the Cholesky factorization of the stiffness matrix derived from a finite-element formulation for the pressure field. This approach reduces the computation of a new pressure solution at each time step to essentially just two sparse matrix back-substitutions. The resulting performance improvement facilitates interactive simulation and the solution of inverse problems which require many simulations of the filling problem. MM

Subject Categories:

  • Laminates and Composite Materials
  • Plastics
  • Manufacturing and Industrial Engineering and Control of Production Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE