IMAGE TENSOR ANALYSIS – A NUMERICAL TOOL FOR DATA ACQUISITION AND CONSTITUTIVE ANALYSIS OF HISTORIC CONTINUA
P.F. Britton, J.G. Loughran · Applied Mechanics · 2002
Image measurement based on the Fast Fourier Transform convolution theorem has been combined with a finite difference algorithm to produce image tensor analysis (ITA), a numerical tool for experimental determination of deformation for historic continua. ITA allows the deformation within an image-compatible material body to be quantified using digital video footage taken from experimental events. Hence the deformation output from computational modelling of the same event can be directly compared to the measured deformation field given by the image-based numerical solution. The current research application of ITA aims to provide experimental deformation data and characterisation of the constitutive behaviour of the fibro-porous media prepared sugar cane. This paper outlines the numerical procedure of ITA and details the possible post processing applications with respect to both data acquisition and constitutive modelling.