El modelado de una grieta de fatiga en una estructura plana y su detección mediante la transformada wavelet

the results of a modal analysis performed in several finite elements models of a planar truss with and without a partial crack, and crack detection by the wavelet transform of nodal displacements in the first mode are shown. the crack is represented by a zone with reduced bending stiffness, following the idea developed by a p. bovsunovsky and v. v. matveev for a cantilever beam, using the concept of strain energy in the crack tip. several mother wavelet were used in order to find the most appropriated for the detection of discontinuities produced by the crack, and its usefulness in crack detection is probed.