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jorgegdiaz's picture

SIF analytic Solution (Mode I and/or II) for Tubes

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I was wondering if anyone knows of an analytic Solution for KI and/or KII in tubes.

I´ve seen an infinite number of equations, shape functions, FEM simulations, standards, etc. But one closed solution for tubes?, an analog to Williams series but for cilindirical surfaces?

I am trying to fit experimental displacement data to Williams series. I´ve done it succesfully for flat specimens (kind of easy actually). But now, we have to do the same for tubes. When cracks are long, you can´t approximate the tube surface to an infinite plate anymore.

Fabrice Pierron's picture

PhD opportunity at ONERA Lille, France

Virtual Fields Method for the dynamic behaviour
characterisation of metallic materials under purely inertial loads

Inelastic material parameter identification is usually performed
using simple or standardized specimens and unidirectional loadings in order to
stress the specimen with a uniformed field (uni-axial tension, torsion, etc.). However,
these tests, called statically determined, become much more complex to analyse

Matlab-based Digital Image and Volume Correlation Simulators


I just posted a Matlab-GUI easy-to-use DIC and DVC simulator tool on our website ( for download for anyone that works with DIC or DVC. The purpose of these simulators is to simulate deformation fields based on a user provided image (2D) or volume (3D), and evaluate the correlation results with the analytical solutions to provide quantitative feedback on the "goodness" of the provided images for DIC or DVC purposes.

Feel free to use them for research, teaching, etc. We welcome any suggestions for improvements, etc.

chris's picture

Multi-Scale Digital Image Correlation and Tracking with MATLAB

C. Eberl, D. S. Gianola, R. J. Thompson (in alphabetic order)


With this contribution we would like to point to a free MATLAB tool which uses digital image correlation and tracking techniques to measure strain from a series of digital images. The code can be found on the ‘MATLAB central file exchange’ as well as the documentation, example images and some slides. We use the code on a daily basis for micro- and nanoscale measurements and present it here to be used and further developed by the community. Since it was posted at the end of september the code is now ranked place one or two in google and has been downloaded about 1000 times.

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