Accession Number : ADA188308

Title :   Further Refinement and Applications of the Mixed Computational Algorithm for Plane Elastic Contact Problems.

Descriptive Note : Interim rept.,

Corporate Author : VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF ENGINEERING SCIE NCE AND MECHANICS

Personal Author(s) : Yogeswaren, E ; Reddy, J N

PDF Url : ADA188308

Report Date : Oct 1987

Pagination or Media Count : 41

Abstract : The mixed finite element scheme developed earlier has been further studied in order to improve the model characteristics and operation as well as to explore further applications with regards to mechanical joints. One of the important modifications that has been implemented in the present study is the utilization of a dynamic as well as a static coefficient of fraction for the evaluation of contacting surface behavior instead of a single friction coefficient used in the previous study. This has improved the model behavior and involved a substantial reorganization of program methodology. Other refinements include the incorporation of a modified solution technique that allows the solution of the indefinite stiffness equation system which if formed in the first iteration of the first load step, and the usage of a finer mesh. The new solution technique also avoids the halt of execution of the program whenever small elements are introduced in the leading diagonal due to contact loss.

Descriptors :   *FRICTION, *JOINTS, *MATHEMATICAL MODELS, *ALGORITHMS, COEFFICIENTS, EQUATIONS, FINITE ELEMENT ANALYSIS, ITERATIONS, LOSSES, MECHANICAL COMPONENTS, MIXING, SOLUTIONS(GENERAL), STATICS, STIFFNESS, SURFACE PROPERTIES, SURFACES, VERTEBRATES, METAL PLATES, LAMINATES, FRACTURE(MECHANICS), SHEAR STRESSES

Subject Categories : Couplers, Fasteners, and Joints
      Mechanics
      Operations Research

Distribution Statement : APPROVED FOR PUBLIC RELEASE