Accession Number : ADA266328


Title :   Anisotropic Damage Mechanics Modeling in Metal Matrix Composites


Descriptive Note : Final rept. 1 Apr 1992-31 Mar 1993


Corporate Author : LOUISIANA STATE UNIV BATON ROUGE DEPT OF CIVIL ENGINEERING


Personal Author(s) : Voyiadjis, George Z ; Kattan, Peter I ; Venson, Anthony R ; Park, Taehyo


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a266328.pdf


Report Date : 15 May 1993


Pagination or Media Count : 142


Abstract : A consistent and systematic theory is developed for the analysis of damage mechanisms in metal matrix composites (MMCs). The theory involves both analytical and experimental procedures for the quantification of certain types of damage in MMCs. The analytical model involves both overall and local approaches to characterize damage in these materials. A series of experiments are conducted for micro- and macro-structural characterization of the MMC. Experiments were conducted on a titanium aluminide SiC-reinforced metal matrix composite. Center-cracked plates with laminate layups of (0/90)s, and (+/-45)s were tested under uniaxial tension. In order to investigate and model damage evolution, each of the specimens is loaded to different load levels ranging from fracture load down to 70% of the fracture load. Scanning electron microscopy (SEM) is performed on representative cross-sections of the damaged specimens. The measured crack densities are then used to define the damage parameters that are used in the theoretical model.... Metal matrix composites, Scanning electron microscopy, Damage parameters, Plasticity, Finite elements.


Descriptors :   *DAMAGE , *METAL MATRIX COMPOSITES , *ANISOTROPY , PLASTIC DEFORMATION , STRESS ANALYSIS , COMPOSITE MATERIALS , FINITE ELEMENT ANALYSIS , FRACTURE(MECHANICS) , MECHANICS , FIBER REINFORCEMENT , ALUMINIDES , PLASTIC PROPERTIES , TITANIUM ALUMINIDE , TENSION , CROSS SECTIONS , CRACK PROPAGATION , ELECTRON MICROSCOPY , THEORY , CRACKS , LAMINATES , MATERIALS , DENSITY


Subject Categories : Laminates and Composite Materials


Distribution Statement : APPROVED FOR PUBLIC RELEASE