User Instructions for the EPIC-2/Rezone Code
Abstract
This report provides user instructions for the 1987 version of the EPIC-2/REZONE code for use with the 1986 version of the EPIC-2 code. Use is restricted to two dimensional geometry (axisymmetric, plane strain, plane stress), and only triangular elements can be rezoned. The primary motivation for this work was the desire to be able to rezone computations involving explosive metal interaction and subsequent jet formulation. It should be useful for other applications. There are two primary reasons for rezoning. One is to improve accuracy and the other is to decrease computing time through use of a larger integration time increment. When triangular elements become very distorted (long and slender) they may not be able to properly represent gradients along the longer dimension of the element, and this can lead to artificial stiffness. Similarly, during high distortion the minimum altitude of the element can become very small and this decreases the integration time increment, which is bounded by the sound speed transit time across the element. Rezoning allows the user to replace distorted elements with compact elements; decreasing the larger dimension gives greater accuracy, and increasing the shorter dimension gives a larger integration time increment.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1987
- Accession Number
- ADA233460
Entities
People
- G. R. Johnson
- R. A. Stryk
Organizations
- Honeywell International, Inc.