A Knowledge-based System for the Determination of Material Response States

Y.M. Haddad (Canada)

Keywords

Material, Response state, Identification, Quantitative, Nondestructive, Pattern recognition

Abstract

The mechanical response state of an engineering material is determined; using quantitative non-destructive testing combined with “pattern recognition and classification” methodologies. In the pertaining experimental procedure, stress waves are “simulated” in the microstructure of the material to resemble acoustic-emission waves but without disrupting the material, i.e., without a simultaneous application of an external loading. The presented approach aims at determining quantitatively the mechanical response states in homogeneous and heterogeneous classes of engineering materials that were subjected a priori to unknown static, quasi-static and dynamic types of loading. The experimental results pertinent to a number of these studies are presented in the paper. The presented approach has proven to be convenient, powerful and efficient. It has also the strong potential of determining non-destructively the ultimate strength of the material in a quantitative manner.

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