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Department of Industrial Engineering (DIIn)
773
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205
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Department of Medicine and Surgery
357
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Publication History View all

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    ABSTRACT: The quality of the joints, in terms of surface aspect and material deposition, was verified by visual inspection, liquid penetrant and X-ray NDT. The chemical composition in the weld zone was estimated by spectrometric analysis, while microstructural aspects were inferred by conventional metallographic techniques. Tensile and hardness tests revealed the conformity of the joints to acceptance criteria specified by AMS 4439F normative. The longitudinal residual stresses induced by FSW, measured using the contour method, follow an M-shaped distribution with the absolute maximum equal to 109 MPa in the advancing side of the weld. Obtained outcomes highlight the feasibility of the FSW process and some advantages achievable w.r.t. TIG process.
    Journal of Materials Processing Technology 01/2015; 215:87–94. DOI:10.1016/j.jmatprotec.2014.07.026
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    ABSTRACT: Biodegradable polymers present a very narrow processing window, with the suitable processing temperatures close to the degradation conditions. The aim of this work was to analyze the foamability of a biodegradable polymer, namely the poly(lactic acid), PLA. Foam injection molding was conducted by using a blowing agent under high pressure and temperature to produce parts having a cellular core and a compact solid skin (the so-called “structural foam”). The effect of a physical blowing agent (PBA) on density and morphology of foamed parts was characterized. A masterbatch of PLA and talc was prepared and adopted to obtain a compound containing 3% of talc. On adding this percentage of talc to PLA it was possible to obtain foamed parts with a much better morphology.
    Journal of Materials Processing Technology 12/2014; 214(12):3098–3107. DOI:10.1016/j.jmatprotec.2014.07.002
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    ABSTRACT: In this paper a geometrically nonlinear model for studying the lateral global buckling problem of a generic thin-walled composite beam is presented. The model is based on full second-order deformable beam theory and accounts for axial, flexural, shear, torsional and warping displacements. Moreover, the web/flange junctions are supposed to be deformable. Governing nonlinear equations are derived from the principle of virtual displacements. Initial numerical results, obtained by means of a finite element approximation, deal with open cross-section composite profiles under flexural/torsional loads, making it possible to identify the relevance of the connection stiffness over the pre-buckling range of the mechanical response. Comparisons with numerical and experimental results available in the literature are also discussed.
    Composite Structures 11/2014; 117:396–410. DOI:10.1016/j.compstruct.2014.06.041

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  • Address
    via Giovanni Paolo II, 132, 84084, Fisciano, Campania, Italy
  • Head of Institution
    Aurelio Tommasetti
  • Website
    http://www.unisa.it/
  • Phone
    +39 089 961111
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Top publications last week by downloads

 
Science of The Total Environment 06/2013; 461-462C:265-281. DOI:10.1016/j.scitotenv.2013.05.004
331 Downloads
 
IEEE Transactions on Power Electronics 08/2005; DOI:10.1109/TPEL.2005.850975
122 Downloads

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