Accession Number : ADA133969

Title :   Modelling Particle - Particle Interaction at the Micro Scale.

Descriptive Note : Final rept. 1 Nov 77-30 Sep 81,


Personal Author(s) : Swedlow,J L

PDF Url : ADA133969

Report Date : 15 Mar 1983

Pagination or Media Count : 117

Abstract : IN high-strength alloys, microstructure can influence toughness in a manner not yet fully quantified. Computational mechanics offers a tool whereby the events leading to fracture may be simulated, but the success of such an enterprise depends heavily upon the quality of the model employed. This report outlines a sequence of events thought to precede ductile fracture and presents a finite element model designed to capture the main events. The model is considered to be an improvement over an earlier one, and data are presented to support this conclusion. Work of this type requires a fine degree of resolution which normally will entail very large, detailed finite element maps. Such map sizes could easily exceed the capacity of research computers, and a substructuring technique is essential to pursue research of this sort. Such a technique has been developed for use without modification to an existing code, i.e., it may be implemented on a standard finite element program directly. (Author)

Descriptors :   *Mathematical models, *Finite element analysis, *High strength alloys, *Microstructure, Particles, Interactions, Toughness, Ductility, Computerized simulation, Loads(Forces), Matrix materials, Dispersing, Stress concentration, Plastic properties, Elastic properties, Titanium alloys, Aluminum, Vanadium, Stress strain relations

Subject Categories : Properties of Metals and Alloys
      Numerical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE