Accession Number : ADA267666


Title :   Elastic-Plastic Finite-Difference Analysis of Unidirectional Composites Subjected to Thermomechanical Cyclic Loading


Descriptive Note : Final rept. 1 Jan-1 Dec 92,


Corporate Author : DAYTON UNIV OH RESEARCH INST


Personal Author(s) : Coker, Demirkan ; Ashbaugh, Noel E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a267666.pdf


Report Date : Dec 1992


Pagination or Media Count : 99


Abstract : An analytical tool was developed to model a unidirectional composite subjected to thermomechanical cyclic loading and processing conditions. The finite difference method was incorporated into a PC compatible computer code, FIDEP (Finite-Difference Code for Elastic-Plastic Analysis of Composites). FIDEP provides an efficient numerical procedure for analyzing a variety of problems involving thermal and mechanical cycling. The procedure allows the modeling of the constituent materials as elastic-plastic with temperature dependent properties. The concentric cylinder approximation allows the computations to capture the three-dimensional aspects of the stress state in a real composite. Results for a thermal cool-down in an SCS-6/Ti-24A1-11Nb unidirectional composite compare well with those obtained using the finite element method. Several problems were solved for thermomechanical loading conditions and demonstrate the three-dimensional nature of the stress fields in the matrix material. Concentric cylinder model, Elastic plastic, Finite difference methods, Metal matrix composite, Thermomechanical fatigue, Unidirectional composite.


Descriptors :   *METAL MATRIX COMPOSITES , *PLASTICS , *THERMAL STRESSES , METALS , TEMPERATURE , COMPUTATIONS , STRESS ANALYSIS , MODELS , THERMOCHEMISTRY , FATIGUE , MICROMECHANICS , UNIDIRECTIONAL , CYCLIC LOADS , FATIGUE(MECHANICS) , GEOMETRY , THREE DIMENSIONAL , TOOLS , PROCESSING , COMPOSITE MATERIALS , ELASTIC PROPERTIES


Subject Categories : Plastics


Distribution Statement : APPROVED FOR PUBLIC RELEASE