Characterization of heterogeneous strain fields by digital image correlation

Structural components, such as turbine parts, are often subjected to severe mechanical and

environmental conditions. In order to extend their in-service life and thus reduce the costs associated

to their maintenance and replacement, it is of importance to understand the factors that impact their

behavior. The development of deformation heterogeneities figures among the main factors. This

project aims at providing a tool for studying the damaging and failure of materials by means of

evaluating strains at the micrometer scale. The tool consists in a code based on the technique of

digital image correlation which compares pairs of images of the same specimen before and after

applied deformation. Typically, these can be optical images, but more sophisticated observation

instruments can also be used. The code evaluates the global necessary deformation to transform the

first image into the second one, hence giving access to the real, mechanical deformation undergone

by the specimen. The final goal is then to investigate relationships between the……..

Faculty Supervisor:

Philippe Bocher

Student:

Partner:

Institut de Recherche Hydro-Québec

Discipline:

Engineering

Sector:

Professional, scientific and technical services; Utilities

University:

École de technologie supérieure

Program:

Accelerate

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