DIM - MAQLAB - Trabajos de investigación

Permanent URI for this collection

https://hdl.handle.net/10016/1169

Browse

Recent Submissions

Now showing 1 - 2 of 2
  • Thumbnail Image
    Publication
    Review of recent advances in the application of the wavelet transform to diagnose cracked rotors
    (MDPI, 2016-03-14) Gómez García, María Jesús; Castejón Sisamón, Cristina; García Prada, Juan Carlos
    Wavelet transform (WT) has been used in the diagnosis of cracked rotors since the 1990s. At present, WT is one of the most commonly used tools to treat signals in several fields. Understandably, this has been an area of extensive scientific research, which is why this paper aims to summarize briefly the major advances in the field since 2008. The present review considers advances in the use and application of WT, the selection of the parameters used, and the key achievements in using WT for crack diagnosis.
  • Thumbnail Image
    Publication
    Mechanical behaviour analyses of sap ascent in vascular plants
    (Springer Verlag, 2010-05) Pérez Díaz, José Luis; García Prada, Juan Carlos; Romera Juárez, Fernando; Díez Jiménez, Efrén
    A pure mechanical anisotropic model of a tree trunk has been developed based on the 3D finite element method. It simulates the microscopic structure of vessels in the trunk of a European beech (Fagus sylvatica) in order to study and analyse its mechanical behaviour with different configurations of pressures in the conduits of xylem and phloem. The dependence of the strains at the inner bark was studied when sap pressure changed. The comparison with previously published experimental data leads to the conclusion that a great tensile stress —or ‘negative pressure’— must exist in the water column in order to achieve the measured strains if only the mechanical point of view is taken into account. Moreover, the model can help to design experiments where qualitatively knowing the strains and the purely mechanical behaviour of the tree is required.