Accession Number : ADA310029

Title :   Micromechanics-Based Failure Model of Granular/Particulate Medium with Reinforcing Fibers.

Descriptive Note : Final rept. 1 Mar 93-29 Feb 96,

Corporate Author : JOHNS HOPKINS UNIV BALTIMORE MD DEPT OF CIVIL ENGINEERING

Personal Author(s) : Michalowski, Radoslaw L.

PDF Url : ADA310029

Report Date : 23 APR 1996

Pagination or Media Count : 96

Abstract : This research has focused on limit behavior of fiber composites with granular matrices (such as fiber reinforced soils). Dominant mechanisms of fiber matrix interaction were identified. Mathematical description of the behavior of granular composites on the macroscale was presented based on microstructural interactions. The concept of mathematical homogenization was introduced to represent the failure properties of the composite on the macroscale. Failure criteria for composites both with fibers in a preferred direction and with randomly distributed fibers were derived. A Laboratory technique was devised for preparation of the specimens of fiber reinforced composites. Experimental test were carried out, and the experimental evidence was collected for validation of the mathematical description. Implementation of the derived criteria in numerical methods for solving boundary value problems was presented.

Descriptors :   *FIBER REINFORCED COMPOSITES, *MATRIX MATERIALS, *FAILURE(MECHANICS), MICROSTRUCTURE, VALIDATION, INTERACTIONS, EXPERIMENTAL DESIGN, PROBLEM SOLVING, BOUNDARY VALUE PROBLEMS, LABORATORY PROCEDURES, NUMERICAL METHODS AND PROCEDURES, REINFORCING MATERIALS, HOMOGENEITY.

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE