Accession Number : ADA290644

Title :   Finite Element Technology for Penetration Problems.

Descriptive Note : Final rept. 1 Jan 91-30 Sep 94,

Corporate Author : NORTHWESTERN UNIV EVANSTON IL DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Belytschko, Ted ; Liu, Wing K.

PDF Url : ADA290644

Report Date : 22 DEC 1994

Pagination or Media Count : 10

Abstract : Finite element methods for penetration mechanics are developed. A pinball contact-impact algorithm which is easily vectorizable has been implemented on partitioned memory SIMD computers. The pinball algorithm is further extended to problems with friction and erosion; Lagrange and augmented Lagrange multiplier methods, and its convergence have also been studied. Multiple-quadrature elements with hourglass control and physical stabilization and multi-time step integration have also been studied. Numerical results of the multiple-quadrature elements with stabilization showed that simple stabilization forces can be obtained which are convergent and based on physical parameters. The implementation of this algorithm on massively parallel machines has also been investigated. (AN)

Descriptors :   *FINITE ELEMENT ANALYSIS, *PENETRATION, STABILIZATION, STRESS STRAIN RELATIONS, ALGORITHMS, COMPUTATIONS, IMPACT, LOADS(FORCES), DEFORMATION, PARALLEL PROCESSING, FRACTURE(MECHANICS), EROSION, SOLUTIONS(GENERAL), NUMERICAL INTEGRATION, SHEAR STRESSES, NONLINEAR ANALYSIS, APPLIED MATHEMATICS, FRICTION, LAGRANGIAN FUNCTIONS, NUMERICAL QUADRATURE.

Subject Categories : Mechanics
      Operations Research

Distribution Statement : APPROVED FOR PUBLIC RELEASE