Experimental methods for the characterization of fatigue in microstructures

G. De Pasquale, A. Somà

Abstract


The mechanical fatigue behavior of gold microbeams is analyzed. Dedicated devices have beendesigned and built able to produce alternate loading on gold specimens; the electrostatic actuation is used asdriving force. Gold beams are tested under both bending and tensile alternate loadings. Results were used toplot S-N curves and fatigue Goodman-Smith diagram in order to estimate the fatigue limit of the material inpresence of mean and alternate stress conditions. The surface topography evolution is studied and failure modesare discussed.

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DOI: http://dx.doi.org/10.3221%2FIGF-ESIS.23.12