Accession Number:

ADA231049

Title:

Contact-Impact Algorithms for Penetration Studies

Descriptive Note:

Final rept. Mar 1987-Aug 1990

Corporate Author:

NORTHWESTERN UNIV EVANSTON IL DEPT OF CIVIL ENGINEERING

Report Date:

1990-11-15

Pagination or Media Count:

22.0

Abstract:

Contact impact algorithms, which are sometimes called slideline algorithms, are a computationally time-consuming part of many explicit simulations of nonlinear problems. One of the reasons for their computational expense is that slideline algorithms are complex with many branches, so they are not amenable to vectorization, which is essential for speed on supercomputers. The pinball algorithm is a simplified slideline algorithm which is readily vectorized. Its major idea is to embed pinballs in surface elements and to enforce the impenetrability condition only to pinballs. The algorithm has been implemented in the WHAMS-3D code. Examples of solutions and running times are given.

Subject Categories:

  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE