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Evaluation of microdeformations and fracture quantities by means of micro moire methods

: Michel, B.; Kühnert, R.

Silva Gomes, J.F.; Branco, F.B.; Martins de Brito, F.; Gil Saraiva, J.; Lurdes Eusebio, M.; Sousa Cirne, J.; Correia da Cruz, A.:
Recent advances in experimental mechanics. Vol.1
Rotterdam: A.A.Balkema, 1994
ISBN: 90-5410-395-7
International Conference on Experimental Mechanics <10, 1994, Lisbon>
Fraunhofer IZM ()
electron microscopy; experimental mechanics; FEM; fracture mechanics; micro moiré method; microdeformation analysis

A hybrid experimental and numerical approach for the determination of microdeformations and fracture quantities is presented on the example of a fatigue cracked aluminum alloy CT-specimen. Using the Micro Moiré Technique the deformation state of the notch and crack tip region is recorded as interference pattern during an in-situ-deformation. The experiments are carried out in a Scanning Electron Microscope. The experiments are coupled with a finite element analysis (2d and 3d). This method can be applied for various materials. From the analysis crack and fracture parameters can be obtained.