Experimental Images of the Distribution of Maximal Shear Stresses in Diametrally Compressed MMC and Aluminum Disks

Published

July 5, 1998

Author(s)

Y Yacobi, Geoffrey B. McFadden, E Drescher-Krasicka

Abstract

Stress mapping techniques by use of an acoustic microscope make use of shear acoustic modes traveling back and forth across the specimen, generated by use of the microscope in an out of focus mode. In the absence of stress the resultant SV (shear vertical) waves would be polarized normal to their direction of propagation, in the vertical plane containing this direction. Stress, however, splits an SV wave into two quasi-shear waves, with their own wave speeds, and polarizations normal to each other and almost normal to their direction of propagation. These waves return with phase differences that depend on the stress in the region sampled by the shear waves, and the interference pattern that results provides the map of that stress. This paper presents stress imaging for diametrally compressed disks from MMC (Metal Matrix Composite). The disks used in the experiment were cut from an extruded aluminum matrix silicon carbide composite plates. The presence of anisotropy introduced by extrusion acts as an additional polarizer in analogy to photoelasticity.

Proceedings Title

ICCCE/5: proceedings of the 5th International Conference on Composites Engineering

Conference Dates

July 5-11, 1998

Conference Location

Undefined

Conference Title

International Conference on Composites Engineering

Pub Type

Conferences

Keywords

accoustoelasiticity, acoustic microscopy, diametrally-compressed disks, metal matrix composites

Citation

Yacobi, Y. , McFadden, G. and Drescher-Krasicka, E. (1998), Experimental Images of the Distribution of Maximal Shear Stresses in Diametrally Compressed MMC and Aluminum Disks, ICCCE/5: proceedings of the 5th International Conference on Composites Engineering, Undefined (Accessed July 18, 2024)